Professor R. Paul Young

Professor of Geophysics

Formerly Vice-President Research, University of Toronto (2007 - 2014)

Professor Paul Young

Contact me

Paul Young
Dept. of Civil Engineering
University of Toronto
35 St. George St.
Toronto, Ontario
Canada, M5S 1A4

Tel: 416-978-5252
Fax: 416-978-4820

paul.young@utoronto.ca

Research Interests

My research group carries out fundamental and applied research at the interface between seismology and rock mechanics.  We are interested in rock fracture physics, earthquake processes, geophysics and geomechanics.  The group currently consists of post-doctoral researchers and PhD students.  The group has a considerable history with alumni as NASA astronauts, academics, seismologists, rock mechanics and geotechnical engineers, and medical doctors.  They work for government, natural radwaste agencies, mining and petroleum companies and are involved in fundamental science and engineering consulting. 

Professor Young has recently been interviewed by the International Innovation publication about Seismic Sounds. In this lively discussion, Prof Young describes how the sounds that different rocks make under stress enable him and his group to see the processes that lead to earthquakes as they unfold. To read the full interview with Prof Young click on the Following link.

Seismic sound

Resources

Research is conducted through laboratory experiments using state of the art rock testing and monitoring equipment, and through developing and using sophisticated geomechanical modelling computer software packages.  We also have extensive in situ microseismic datasets recorded at the Underground Research Laboratory in Canada where experiments were conducted to study induced fracturing and rock-fluid interactions.  Additionally, the group applies acoustic emission and ultrasonic monitoring techniques to concrete structures to further understand the load-induced failure process. For more information on research group resources and facilities please Click Here.

Education and Qualifications

2007, FRSC (Fellow, Royal Society of Canada)
1986, C.Eng. (Chartered Professional  Engineer)
1983, FGS (Fellow, Geological Society of London)
1983, C. Geol. (Chartered Professional Geologist)
1981, Ph.D. (Council National Academic Awards, U.K.)
1976, Postrgraduate Cert. Ed. (University of London, U.K.)
1974, M.Sc. (University of Newcastle-upon-Tyne, U.K.)
1973, B.Sc. Hons (University of London, U.K.)

Biography

Teaching

Course Code Title & Description
*Note: This website represents the official and most accurate timetable. Please cross reference ROSI/ACORN with this table for correct dates and times.
Keywords Instructor Session Location(s) Day(s) + Time(s)

Possible research topics for future students

Possible Research topics
  • Rock fracture dynamics: A combination of lab studies and numerical modelling to yield insights into brittle fracture processes
  • Induced seismicity: an investigation of relationships between rock damage, rock integrity and seismicity in-situ through active and passive acoustic studies and advanced data analysis and interpretation techniques
  • Earthquake and fault mechanics: Simulation of unstable stick-slip behaviour in the lab and on computers - accompanied by detailed micostructural analyses of fault zones
  • Rock damage: understanding the evolution of rock damage under different mechanical, thermal and hydraulic stress conditions using continuous acoustic recording and numerical simulations

If you are interested in joining the group and pursuing graduate studies in this field, please  Contact Professor Young

Rock Physics and Geomechanics Research Group

Current Members

Publication

  1. H.O. Ghaffari and B.D. Thompson and R.P. Young, 2014, Complex networks and waveforms from acoustic emissions in laboratory earthquakes, Nonlinear Processes in Geophysics, 21, 763 - 775.
  2. Goodfellow, S.D., J.W. Flynn, J.M. Reyes-Montes, M.H.B. Nasseri, and R.P. Young, 2014, Acquisition of Complete Amplitude Records during Rock Fracture Experiments, Journal of Acoustic Emission, Vol 32, pp. 1 - 11.
  3. Ghaffari, H.O., M.H.B. Nasseri, and R.P. Young, 2014, Faulting of Rocks in a Three-Dimensional Stress Field by Micro-Anticracks, Nature Scientific Reports, DOI: 10.1038/srep05011.
  4. Goodfellow, S.D., and R.P. Young, 2014, A Laboratory Acoustic Emission Experiment Under In Situ Conditions, Geophysical Research Letters, DOI: 10.1002/2014GL059965.
  5. Nasseri, M.H.B, Goodfellow, S.D., Lombos, L., Young, R.P., (2013) 3-D Transport and acoustic properties of Fountainebleau sandstone during true-triaxial deformation experiments. Accepted to International Journal of Rock Mechanics and Mining Sciences.
  6. Nasseri, M.H.B. Goodfellow, S.D. Wanne, T.S. and Young, R.P (2013), Thermo-Hydro-Mechanical properties of Cobourg Limestone, Int. J. Rock Mech. Min. Sci., 61, 212-222.
  7. Ghaffari H.O., and Young R.P, (2013). Acoustic-Friction Networks and Evolution of Shear Ruptures in Laboratory Earthquakes, in revision for Nature-Scientific Reports.
  8. Ghaffari, H.O. Sharifzdeh, M. and Young, R.P. (2013). Complex Aperture Networks; Physica A; 392, 4, 15 2013, 1028–103.
  9. Ghaffari H.O., and Young R.P. (2012). Network–Configurations of Dynamic Friction Patterns, EPL 98 48003 doi:10.1209/0295-5075/98/48003(2012).
  10. Ghaffari H.O., M.Sharifzadeh, E.Evgin and P.Young, (2012) Complexity of Frictional Interfaces: A Complex Network Perspective; Geomechanics and Geoengineering: An International Journal; DOI:10.1080/17486025.2012.727036 (2012).
  11. Ghaffari H.O., and Young R.P. (2012). Topological complexity of frictional interfaces: friction networks; Nonlin. Processes Geophys., 19, (2012),215-225.
  12. Young R.P, M.H.B. Nasseri and L. Lombos, (2011). Imaging the effect of the intermediate principal stress on strength, deformation and transport properties of rocks using seismic methods. P. 167-179. True Triaxial Testing of Rocks (Geomechanics Research Series Book) Edited by Marek Kwasniewski, Xiaochun Li, Manabu Takahashi.
  13. Zhao, X. P., and R. P. Young, (2011) "Numerical Modeling of Seismicity Induced by Fluid Injection in Naturally Fractured Reservoirs," Geophysics, 76, 169-184.
  14. Nasseri, M.H.B. F.Rezannezhad And Young, R. P. (2010). Analysis of fracture damage zone in anisotropic granitic rock using 3D X-ray CT scanning techniques. Int. J. of Fracture DoI 10.1007/s10704-010-995-0.
  15. Nasseri, M.H.B. Grasselli, G. Mohanty, B. (2010). Fracture toughness and fracture roughness in anisotropic granitic rocks. J of Rock Mechanics, Vol 43, 4:403-415.
  16. Zhao, X. P., D. Collins and R. P. Young, (2010). "Gaussian-Beam Polarization-based Location Method Using S-wave for Hydraulic Fracturing Induced Seismicity," CSEG Recorder, 35, 28-33 (2010).
  17. Nasseri MHB, Tatone BSA, Grasselli G and Young RP (2009), Fracture toughness and fracture roughness interrelationship in thermally treated Westerly granite, Pure and Applied Geophysics (DOI 10.1007/s00024-009-0476-3).
  18. Nasseri MHB, Schubnel A, Benson PM and Young RP (2009), Common evolution of mechanical and transport properties in thermally cracked Westerly granite at elevated isostatic pressure, Pure and Applied Geophysics, (DOI 10.1007/s00024-009-0485-2).
  19. Thompson BD, Young RP and Lockner DA (2009). Premonitory Acoustic Emissions and stick-Slip in Natural and Smooth Faulted Westerly Granite (Short Title: AE and CT Imaging of a Natural Fault), Journal of Geophysical Research, vol, 114, B02205, dio: 10.1029/2008JB005753,.
  20. Benson P.M., P.G. Meredith, S. Vinciguerra, and R.P. Young (2008), Laboratory Simulation of Volcano Seismicity.* Science, 322, 249, doi: 10.1126/science.1161927
  21. Townend E, Thompson BD, Benson PM, Meredith PG, Baud P, and Young RP, 2008. Imaging compaction band propagation in Diemelstadt sandstone using acoustic emission locations, Geophys. Res. Lett., 35, L15301, doi:10.1029/2008GL034723.
  22. Thompson BD, Young RP and Lockner DA, 2008. Premonitory Acoustic Emissions and Stick-Slip in Natural and Smooth Faulted Westerly Granite (Short Title: AE and CT Imaging of a Natural Fault), Journal of Geophysical Research, submitted.
  23. Reyes-Montes JM, Pettitt WS and Young RP, 2008. Enhanced Spatial Resolution of Caving-Induced Microseismicity, in Proceedings of 5th International Conference on Mass Mining, Lulea, Sweden, June 9-11.
  24. Katsaga T and Young RP, 2007. Acoustic Emission and X-ray Tomography Imaging of Shear Fracture Formation in Concrete, Journal of Acoustic Emission, 25, 294-307.
  25. Schubnel A, Thompson BD, Fortin J, Gueguen Y and Young RP, 2007. Fluid-induced Rupture Experiment on Fontainebleau Sandstone: Premonitory Activity, Rupture Propagation, and Aftershocks, Geophysical Research Letters, 34, L19307, doi:10.1029/2007GL031076.
  26. Wanne TS and Young RP, 2007. Bonded-particle modeling of thermally fractured granite, International Journal of Rock Mechanics and Mining Sciences, doi:10.1016/j.ijrmms.2007.09.004.
  27. Katsaga T, Sherwood EG, Collins MP and Young RP, 2007. Acoustic emission imaging of shear failure in large reinforced concrete structures, International Journal of Fracture, DOI: 10.1007/s10704-008-9174-x.
  28. Wanne TS and Young RP, 2007. Thermal modeling using particle clusters in PFC, in Proceedings of 11th Congress of Int Soc for Rock Mechanics, Lisbon, July 9-13.
  29. Young RP and Thompson BD, 2007. Imaging dynamic rock fracture with acoustic emission and x-ray tomography, in Proceedings of 11th Congress of Int Soc for Rock Mechanics, Lisbon, July 9-13.
  30. Nasseri MHB, Schubnel A and Young RP, 2007. The evolution of fracture toughness and permeability in thermally cracked westerly granite from elastic wave velocities, in Proceedings of 1st Canada-US Rock Mechanics Symposium, Vancouver, May 27-31.
  31. Schubnel A, Jones G, Thompson B, Fortin J, Gueguen Y and Young RP, 2007. Pore pressure induced rupture and aftershocks on intact and fractured Fontainebleau sandstone in the laboratory, Journal of Geophysical Research, submitted.
  32. Mair K, Marone C and Young RP, 2007. Rate dependence of acoustic emissions generated during shear of simulated fault gouge, Bulletin Seismological Society America, 97 (6), 1841-1849, doi:10.1785/0120060242.
  33. Nasseri MHB, Schubnel A, and Young RP, 2007. Coupled Evolutions of Fracture Toughness and Elastic Properties at High Crack Density in Thermally Treated Westerly Granite, International Journal of Rock Mechanics and Mining Sciences, 44, 4, 601-616.
  34. Benson PM, Thompson BD, Meredith PG, Vinciguerra S and Young RP, 2007. Imaging slow failure in triaxially deformed Etna basalt using 3D acoustic-emission location and X-ray computed tomography, Geophysical Research Letters, 34, L03303, doi:10.1029/2006GL028721.
  35. Haycox JR, Pettitt WS, Collins DS and Young RP, 2006. Validating 3-D numerical models of rock fracture with laboratory and field scale studies, in Proceedings of 5th International Congress on Environmental Geotechnics, Wales.
  36. Pettitt WS, Haycox JR and Young RP, 2006. Monitoring the rock barrier around a deep repository using scaled seismic studies, in Proceedings of 5th International Congress on Environmental Geotechnics, Wales.
  37. Wanne TS and Young RP, 2006. Bonded-Particle Model for Thermally Fractured Granitic Rock, in Proceedings of Eurock 2006, Belgium.
  38. Nasseri MHB, Mohanty B and Young RP, 2006. Fracture Toughness Measurements and Acoustic Emission Activity in Brittle Rocks, Pure and Applied Geophysics, 163, 5-6, 10.1007/s00024-006-0064-8, 1-29.
  39. Thompson BD, Young RP and Lockner DA, 2006. Fracture in Westerly Granite under AE Feedback and Constant Strain Rate Loading: Nucleation, Quasi-static Propagation, and the Transition to Unstable Fracture Propagation, Pure and Applied Geophysics, 163, 10.1007/s00024-006-0054.
  40. Schubnel A, Thompson B, Fortin J, Gueguen Y and Young RP, 2006. Transient Creep, Aseismic Damage and Slow Failure Observed Around the Brittle Ductile Transition of Carrara Marble, Geophysical Research Letters, 33, L17301, doi:10.1029/2006GL026619.
  41. Schubnel A, Benson P, Thompson B, Hazzard J and Young RP, 2006. Quantifying Damage, Saturation and Anisotropy in Cracked Rocks by Inverting Elastic Wave Velocities, Pure and Applied Geophysics, 163 (5-6), doi:10.1007/s00024-006-0061-y, 947-973.
  42. Benson P, Schubnel A, Vinciguerra S, Trovato C, Meredith P and Young RP, 2006. Modelling the Permeability Evolution of Micro-cracked Rocks from Elastic Wave Velocity Inversion at Elevated Hydrostatic Pressure, Journal of Geophysical Research, 111, B04202.
  43. Meglis IL, Chow T, Martin CD and Young RP, 2005. Assessing In Situ Microcrack Damage Using Ultrasonic Velocity Tomography, International Journal of Rock Mechanics and Mining Sciences, 42 (1), 25-34.
  44. Thompson BD, Young RP and Lockner DA, 2005. Observations of Premonitory Acoustic Emission and Slip Nucleation During a Stick Slip Experiment in Smooth Faulted Westerly Granite, Geophysical Research Letters, 32, L10304.
  45. Nasseri BMH, Thompson B, Schubnel A and Young RP, 2005. Acoustic Emission Monitoring of Mode I Fracture Toughness (CCNBD) Test in Lac du Bonnet Granite, in Proceedings of Alaska Rocks conference, Alaska.
  46. Iwata T and Young RP, 2005. Tidal Stress/Strain and the b-value of Acoustic Emissions in the Underground Research Laboratory, Canada, Pure and Applied Geophysics, 162, 1291-1308.
  47. Hildyard MW, Young RP, Collins DS and Pettitt W, 2005. Seismic Wave Propagation to Diagnose the State of Fracturing, Journal of the South African Institute of Mining and Metallurgy, 105, 437-447.
  48. Al-Busaidi A, Hazzard JF and Young RP, 2005. Distinct Element Modeling of Hydraulically Fractured Lac du Bonnet Granite, Journal of Geophysical Research, 110, B06302.
  49. Nasseri BMH, Mohanty B and Robin P-Y, 2005. Characterization of Microstructures and Fracture Toughness in Five Granitic Rocks, International Journal of Rock Mechanics, 42 (3), 450-460.
  50. Reyes-Montes, Rietbrock A, Collins DS and Young RP, 2005. Relative Location of Excavation Induced Microseismicity at the Underground Research Laboratory (AECL, Canada) Using Surveyed Reference Events, Geophysical Research Letters, 32, doi:10.1029/2004GL021733.
  51. Fortin J, Schubnel A and Guéguen Y, 2005. Elastic Wave Velocities and Permeability Evolution During Compaction of Bleuswiller Sandstone, International Journal of Rock Mechanics, 42 (7-8), 873-889.
  52. Young RP, Collins DS, Pettitt WS and Hazzard JF, 2004. Imaging and Visualization of Fractures in Rock Engineering, in Proceedings of the ISRM International Symposium 3rd ARMS, Kyoto, Japan, Ohnishi & Aoki (eds), Millpress, Rotterdam, 3-12.
  53. Hazzard JF and Young RP, 2004. Dynamic Modelling of Induced Seismicity, International Journal of Rock Mechanics, 41(8), 1365-1376.
  54. Young RP, Collins DS, Reyes-Montes JM and Baker C, 2004. Quantification and Interpretation of Seismicity, International Journal of Rock Mechanics, 41(8), 1317-1328.
  55. Hazzard JF and Young RP, 2004. Numerical investigation of induced cracking and seismic velocity changes in brittle rock, Geophysical Research Letters, 31(1), doi:10.1029/2003GL019190.
  56. Hazzard JF and Mair K, 2003. The Importance of the Third Dimension in Granular Shear, Geophysical Research Letters, 30(13), doi:10.1029/2003GL017534.
  57. Hazzard JF and Young RP, 2002. Moment tensors and micromechanical models, Tectonophysics, 356, 181-197.
  58. Hazzard JF, Young RP and Oates SJ, 2002. Numerical modelling of seismicity induced by fluid injection in a fractured reservoir, in Mining and Tunnel Innovation and Opportunity, Proceedings of the 5th North American Rock Mechanics Symposium, Toronto, Canada, 1023-1030. University of Toronto Press.
  59. Pettitt WP, Baker C and Young RP, 2002. Using Acoustic Emission and Ultrasonic techniques for assessment of damage around critical engineering structures, in Mining and Tunnel Innovation and Opportunity, Proceedings of the 5th North American Rock Mechanics Symposium, Toronto, Canada, 1161-1170. University of Toronto Press.
  60. Baker C and Young RP, 2002. Applications of ultrasonic techniques to in-situ investigation of critical structures in rock and concrete, in Mining and Tunnel Innovation and Opportunity, Proceedings of the 5th North American Rock Mechanics Symposium, Toronto, Canada, 425-432. University of Toronto Press.
  61. Collins DS and Young RP, 2002. Interpreting the amount and orientation of microcracks in the Excavation Disturbed Zone using velocity, modulus and crack density values, in Proceedings of Workshop on Excavation Damage Zone at the 5th North American Rock Mechanics Symposium, Toronto, Canada
  62. Hazzard JF, 2002. 3D Numerical Modelling of Acoustic Emissions, in Proceedings of the ISRM workshop on Geophysics in Rock Mechanics at the 5th North American Rock Mechanics Symposium, Toronto, Canada.
  63. Mair K, 2002. Experimental Studies of Rock Fracture, in Proceedings of the ISRM workshop on Geophysics in Rock Mechanics at the 5th North American Rock Mechanics Symposium, Toronto, Canada.
  64. Iwata, T., 2002. Tidal stress/strain and acoustic emission activity at the Underground Research Laboratory, Canada, Geophysical Research Letters, 29 (7), 30-1 - 30-4
  65. Collins DS, Pettitt WS and Young RP, 2002. High-resolution mechanics of a micro-earthquake sequence, Pure Appl. Geophys., 159, 197 - 219
  66. Hazzard JF, Collins DS, Pettitt WS, and Young RP,2002. Simulation of unstable fault slip in granite using a bonded-particle model, Pure Appl. Geophys., 159 , 221 - 245
  67. Pettitt WS, Baker C, Young RP, Dahlstrom LO, and Ramqvist G, 2002. The assessment of damage around critical engineering structures using induced seismicity, Pure Appl. Geophys., 159, 179 - 195
  68. Hildyard, MW and Young RP, 2002. Modelling seismic waves around underground openings, Pure Appl. Geophys., 159, 247 - 276
  69. Debski W & Young RP, 2002. Tomographic imaging of thermally induced fractures in granite using Bayesian inversion, Pure Appl. Geophys., 159 , 277 - 307
  70. Young, R.P. and Baker, C, 2001. Microseismic Investigation of Rock Fracture and its Application in Rock and Petroleum Engineering. Int. Soc. Rock Mech. News Journal , 7, 19 - 27
  71. Young, R.P. and Collins, D.C, 2001. Seismic studies of rock fracture at the Underground Research Laboratory, Canada, Int. J. Rock Mech. Min. Sci., special issue on geophysics in rock mechanics, 38, 787 - 799
  72. Šílený, J., Pšencík, I., and Young, R.P., 2001. Point-source inversion neglecting a nearby free surface: simulation of the Underground Research Laboratory, Canada, Geophys. J. Int., 146, 171-180
  73. Hazzard, J.F. and Young, R.P., 2001. Seismic validation of micromechanical models, in Rock Mechanics in the National Interest (Proceedings of the 38th U.S. Rock Mechanics Symposium, Washington D.C., USA, 7-10 July 2001) , D. Elsworth, J.P. Tinucci, K.A. Heasley (eds.), Vol. 2, pp. 1327-1334. Balkema, Lisse
  74. Meglis, I.L., Chow, T. and Young, R.P., 2001. Assessing microcrack damage around a tunnel at the Underground Research Laboratory using ultrasonic velocity tomography, in Rock Mechanics in the National Interest (Proceedings of the 38th U.S. Rock Mechanics Symposium, Washington D.C., 7-10 July 2001) , D. Elsworth, J.P. Tinucci, K.A. Heasley (eds.), Vol. 2, pp. 919-926. Balkema, Lisse.
  75. Hazzard JF, Young RP, and Maxwell SC, 2000. Micromechanical modelling of cracking and failure in brittle rocks. J. Geophys. Res., 105, B7, 16,683-16,697.
  76. Young, RP, Hazzard, JF and Pettitt, WS, 2000. Seismic and Micromechanical Studies of Rock Fracture, Geophys. Res. Lett., 27, 1767-1770.
  77. Collins DS and Young RP, 2000. Lithological Controls on Seismicity in Granitic Rocks. Bull. Seismol. Soc. Am., 90, 3, 709-723.
  78. Hazzard JF and Young RP, 2000. Simulating acoustic emissions in bonded particle models of rock. Int. J. Rock Mech. Min. Sci., 37, 867-872.
  79. Chandler N, Read RS, Cundall P, Potyondy D, Detournay E, Young RP, Lau J, and Simmons G, 2000. An integrated approach to excavation design - a project within Canada's used fuel disposal program, in Pacific Rocks, Proceedings of the 4th North American Rock Mechanics Symposium (NARMS), Seattle, Washinton, USA, 31 July-3 August 2000 , J. Girard, M. Liebman, C. Breeds & T. Doe (eds.), pp. 1271-1278, Balkema: Rotterdam.
  80. Young RP, and Pettitt WS, 2000. Investigating the stability of engineered structures using acoustic validation of numerical models (invited paper), in Trends in Rock Mechanics, Proceedings of Geo-Denver 2000, Denver, Colorado, Aug. 5-8, 2000, pp. 1-15, American Society of Civil Engineers Geotechnical Special Publication No. 102, Reston, Virginia.
  81. Holmes GM, Crampin S, Young RP, 2000. Controlled sources for shear-wave surveys in mines, Geophysical Prospecting, 48, 399-414.
  82. Holmes GM, Crampin S, Young RP, 2000. Seismic anisotropy in granite at the Underground Research Laboratory, Manitoba, Geophysical Prospecting, 48 , 415-436.
  83. Young RP and Collins DS, 1999. Monitoring an Experimental Tunnel Seal in Granite using Acoustic Emission and Ultrasonic Velocity. in Rock Mechanics for Industry, Proceedings of the 37th US Rock Mechanics Symposium, Vail, Colorado, 6-9 June 1999 , Amadei, Kranz, Scott & Smeallie (eds), Vol, 2, pp. 869-876, Balkema: Rotterdam
  84. Cabrera J, Volant P, Baker C, Pettitt WS, and Young RP, 1999. Structural and geophysical investigations in the EDZ (Excavation Disturbed Zone) in indurated argillaceous media: The tunnel and the galleries of the IPSN Tournemire site, France, in Rock Mechanics for Industry, Proceedings of the 37th US Rock Mechanics Symposium, Vail, Colorado, 6-9 June 1999, Amadei, Kranz, Scott & Smeallie (eds), Vol. 2, pp. 957-964, Balkema: Rotterdam
  85. Debski W and Young RP, 1999. Enhanced velocity tomography: practical method of combining velocity and attenuation parameters, Geophys. Res. Lett. , 26 , 3253-3256.
  86. Maxwell SC, Young RP, Bossu R, Jupe A, Dangerfield J, 1999. Microseismic logging of Ekofisk, Journal of Petroleum Technology, 51, 78-79
  87. Young RP, 1999. Acoustic Remote Monitoring of Rock and Concrete Structures for Nuclear Waste Repositories, Swedish National Council for Nuclear Waste International Seminar on Retrievability of HLW and Spent Nuclear Fuel, Stockholm.
  88. Maxwell SC, Young RP, and Read RS, 1998. A micro-velocity tool to assess the excavation damaged zone. Int. J. Rock Mech. Min. Sci., 35 , 235-247.
  89. Falls SD and Young, RP, 1998. Acoustic Emission and ultrasonic-velocity methods used to characterise the excavation disturbance associated with deep tunnels in hard rock. Tectonophysics, 289, 1-15.
  90. Maxwell SC and Young, R.P., 1998. Propagation effects of an Underground Excavation. Tectonophysics , 289, 17-30.
  91. Hazzard JF, Maxwell S, and Young RP, 1998. Micromechanical modelling of acoustic emissions. in Eurock98, Proceedings SPE/ISRM Rock Mechanics in Petroleum Engineering, Trondheim, Norway, 8-10 July 1998, Vol. 1, pp. 519-526, SPE 47320.
  92. Pettitt WS, Young RP and Marsden JR, 1998. Investigating the mechanics of microcrack damage induced under true-triaxial unloading, in Eurock98, Proceedings SPE/ISRM Rock Mechanics in Petroleum Engineering, Trondheim, Norway, 8-10 July 1998 , Vol, 1, pp. 509-518, SPE 47319.
  93. Maxwell SC, Young RP, Bossu R, Jupe A and Dangerfield J, 1998. Microseismic Logging of the Ekofisk Reservoir, in Eurock98, Proceedings SPE/ISRM Rock Mechanics in Petroleum Engineering, Trondheim, Norway, 8-10 July 1998, Vol. 1, pp. 387-394, SPE 47276.
  94. Baker C and Young RP, 1997. Evidence for extensile crack initiation in point source time-dependent moment tensor solutions. Bull. Seismol. Soc. Am., 87, 6, 1442-1453.
  95. Maxwell SC and Young, RP, 1997. Assessing induced fracturing around underground excavations using velocity imaging and induced seismicity, in Rockbursts and Seismicity in Mines, Proceedings of the 4th International Symposium, Krakow, Poland, 11-14 August, 1997, S.J. Gibowicz & S. Lasocki (eds.), pp. 373-377, Balkema: Rotterdam.
  96. Šílený J, Vavrycuk V, Baker C, and Young RP, 1997. Determination of source parameters from noisy waveforms: Inversion of displacement seismograms versus accelerograms. in Rockbursts and Seismicity in Mines, Proceedings of the 4th International Symposium, Krakow, Poland, 11-14 August, 1997, S.J. Gibowicz & S. Lasocki (eds.), pp. 95-100, Balkema: Rotterdam.
  97. Šílený J, Baker, C, 1997. Fast estimate of the focal mechanism of mining tremors from P and S amplitudes, in Rockbursts and Seismicity in Mines, Proceedings of the 4th International Symposium, Krakow, Poland, 11-14 August, 1997 , S.J. Gibowicz & S. Lasocki (eds.), pp. 39-43, Balkema: Rotterdam.
  98. Maxwell SC and Young, RP, 1996. Seismic imaging of rock mass response to excavation, Int. J. Rock Mech. Min. Sci., 33, 713-724.
  99. Maxwell SC, Young RP, Baker C, Collins DS, and Martin CD, 1996. Mapping the excavation disturbed zone around the mine-by tunnel using induced seismicity and velocity imaging, in Proceedings of International Conference on Geological Disposal of Radioactive Waste, Special Publication of the Canadian Nuclear Society , J. Martino & D. Martin (eds.), pp. 67-76.
  100. Falls, SD, and Young RP, 1996. Comparison of excavation disturbance around deep tunnels in hard rock using acoustic emission and ultrasonic velocity methods, in Proceedings of International Conference on Geological Disposal of Radioactive Waste, Special Publication of the Canadian Nuclear Society , J. Martino & D. Martin (eds.), pp. 77-86.
  101. Falls, SD, and Young RP, 1996. Examination of the Excavation-Disturbed Zone in the Swedish ZEDEX Tunnel Using Acoustic Emission and Ultrasonic Velocity Measurements, in Eurock '96, Proceedings SPE/ISRM Rock Mechanics in Petroleum Engineering, Turin, Italy, Barla (ed.), pp. 1337-1344, Balkema: Rotterdam.
  102. Young RP, 1995. Application of induced seismicity to radioactive waste management programmes, in Engineering Geology of Waste Disposal, S.P. Bentley (ed.), Geological Society Engineering Geology Special Publication No. 11 , pp. 223-230.
  103. Meglis IL, Chow TM and Young RP, 1995. Progressive microcrack development in tests on lac du bonnet granite-I. acoustic emission source location and velocity measurements. Int. J. Rock Mech. Min. Sci., 32, 741-750
  104. Chow TM, Meglis IL and Young RP, 1995. Progressive microcrack development in tests on lac du bonnet granite-II. ultrasonic tomographic imaging. Int. J. Rock Mech. Min. Sci. , 32, 751-761.
  105. Maxwell SC and Young RP, 1995. A controlled in-situ investigation of the relationship between stress, velocity and induced seismicity. Geophys. Res. Lett. , 22, 1049-1052.
  106. Meglis IL, Gagnon RE and Young RP, 1995. Microcracking during stress-relief of polycrystalline ice formed at high pressure. Geophys. Res. Lett.,22, 2207-2210.
  107. Trifu CI, Urbancic TI and Young RP, 1995. Source parameters of mining-induced seismic events: an evaluation of homogeneous and inhomogeneous faulting models for assessing damage potential. Pure Appl. Geophys., 145 , 3-27.
  108. Martin CD, Young RP, and Collins DS, 1995. Monitoring progressive failure around a tunnel in massive granite, in Proceedings of the 8th International Congress of the International Society for Rock Mechanics, Tokyo, Japan, Sept. 1995 , pp. 627-634.
  109. Urbancic, T.I. and Young RP, 1995. Structural characterization of highly stressed rock masses using microseismic fault-plane solutions, in Fractured and Jointed Rock Masses, Proceedings of the Conference on Fractured and Jointed Rock Masses, Lake Tahoe, California, 3-5 June 1992, L.R. Myer, N.G.W. Cook, R.E. Goodman & C.F. Tsang (eds.), pp. 237-244.
  110. Feustal, A.J. and Young, R.P., 1994. Qß Estimates from Spectral Ratios and Multiple Lapse Time Window Analysis: Results from an Underground Research Laboratory in Granite , Geophys. Res. Lett. , 21, 1503-1506
  111. Young, R.P., and Maxwell, S.C. 1994. Seismic Imaging in Rockburst Investigations, in Proceedings of International Workshop on Applied Rockburst Research, Santiago, Chile, 12 May 1994, pp. 25-41.
  112. Maxwell, S.C. and Young, R.P., 1994. Application of Seismic Tomography to Induced Seismicity Investigations, in Eurock '94, Proceedings SPE/ISRM Rock Mechanics in Petroleum Engineering, Delft, Netherlands, 29-31 Aug 1994 , pp. 597-604, Balkema: Rotterdam. SPE 28102
  113. Young, R.P. and Martin, C.D., 1993. Potential Role of Acoustic Emission/Microseismicity Investigations in the Site Characterization and Performance Monitoring of Nuclear Waste Repositories, Int. J. Rock Mech. Min. Sci. , 30, 797-803
  114. Carlson, S.R. and Young, R.P., 1993. Acoustic Emission and Ultrasonic Velocity Study of Excavation-Induced Microcrack Damage at the Underground Research Laboratory, Int. J. Rock Mech. Min. Sci., 30, 901-907
  115. Connors, C.F., Urbancic, T.I., Bawden, W.F. and Young, R.P., 1993. Constraining Numerical Models with Geomechanical Data and Microseismic Fault-plane Solutions, Int. J. Rock Mech. Min. Sci., 30, 1371-1377.
  116. Maxwell, S.C., Young, R.P., 1993. Associations Between Temporal Velocity Changes and Induced Seismicity, Geophys. Res. Lett., 20, 2929-2932
  117. Maxwell, S.C. and Young, R.P., 1993. Seismic Imaging of Blast Damage, Int. J. Rock Mech. Min. Sci., 30, 1435-1440
  118. D.P.Jansen, S.R.Carlson, R.P. Young, and D.A. Hutchins, 1993. Ultrasonic Imaging and Acoustic Emission Monitoring of Thermally Induced Microcracks in Lac du Bonnet Granite, J. Geophys. Res., 98, 22,231-22,243.
  119. Urbancic, T.I., Trifu, C.I. and Young, R.P., 1993. Microseismicity derived fault-planes and their relationship to focal mechanism, stress inversion, and geologic data. Geophys. Res. Lett., 20, 2475-2478.
  120. Urbancic, T.I. and Young, R.P., 1993. Space-Time Variations in Source Parameters of Mining-Induced Seismic Events with M < 0, Bull. Seismol. Soc. Am ., 83 , 378-397
  121. Young, R.P., 1993. Seismic Methods Applied to Rock Mechanics, Int. Soc. Rock Mech. News Journal , 1, 4-18
  122. Maxwell, S.C. and Young, R.P., 1993. A Comparison Between Controlled Source and Passive Source Seismic Velocity Images, Bull. Seismol. Soc. Am., 83 , 1813-1834
  123. Trifu, C.I., Urbancic, T.I. and Young, R.P., 1993. Non-Similar Frequency-Magnitude Distribution for M<1 Seismicity. Geophys. Res. Lett., 20 , 427-430
  124. 7 papers in Rockbursts and Seismicity in Mines, Proceedings of the 3rd International Symposium, Kingston, Ontario Canada, 16-18 August, 1993 . R.P.Young (ed.).
  125. Young, R.P., Maxwell, S.C., Urbancic, T.I. and Feignier, B., 1992. Mining-Induced Microseismicity: Monitoring and Applications of Imaging and Source Mechanism Techniques, Pure Appl. Geophys., 139, 697-719
  126. Urbancic, T.I., Feignier, B. and Young, R.P., 1992. Influence of Source Region Properties on Scaling Relations for M < 0 Events. Pure Appl. Geophys., 139, 721-739
  127. Urbancic, T.I., Trifu, C.I., Long, J.M. and Young, R.P., 1992. Space-Time Correlations of b-Values with Stress Release. Pure Appl. Geophys., 139, 449-462..
  128. Maxwell, S.C. and Young, R.P., 1992. Sequential Velocity Imaging and Microseismic Monitoring of Mining-Induced Stress Change, Pure Appl. Geophys., 139 , 421-447
  129. Feignier, B. and Young, R.P., 1992. Moment Tensor Inversion of Induced Microseismic Events: Evidence of Non-Shear Failures in the -4 < M < -2 Moment Magnitude Range, Geophys. Res. Lett., 19, 1503-1506
  130. Young, R.P. and Maxwell, S.C, 1992. Seismic Characterization of a Highly Stressed Rock Mass Using Tomographic Imaging and Induced Seismicity, J. Geophys. Res ., 97 , 12,361-12,373
  131. Falls, S.D., Young, R.P., Carlson, S.R. and Chow, T., 1992. Ultrasonic Tomography and Acoustic Emission in Hydraulically Fractured Lac du Bonnet Grey Granite, J. Geophys. Res ., 97, 6867-6884
  132. Talebi, S. and Young, R.P., 1992. Microseismic Monitoring in Highly Stressed Granite: Relation between Shaft-Wall Cracking and In Situ Stress, Int. J. Rock Mech. Min. Sci. , 29, 25-34

News

News 2013-2016

2016

  • April 2016: Paul Young's research group attended EGU 2016, Vienna, Austria. Farzine Nasseri had a talk entitled " Coupled hydromechanical properties of Cobourg limestone with special reference to excavation damage zones", other research group members also participate in this conference by presenting posters. For more information about the conference please refer to EGU 2016 website.
  • February 2016: Prof. Paul Young will have a seminar in Stanford university on Thursday, 4th February 2016 12:00PM to 01:15 PM. The presentation will describe controlled true-triaxial deformation experiments from the laboratory and in situ that facilitate the study of rock fracture dynamics. For more information click here.
  • January 2016: Professor Greg McLaskey from Cornell university visited Prof.Paul young and his research group. Prof. Paul Young hosted a non-official seminar in RFDF seminar room, university of Toronto. In this seminar, Professor Greg McLaskey had a presentation about Calibrated Acoustic Emission systems and the recording of very small fracturing events down to M-8. All the rock physics colleagues from the department of Civil and Physics at the university of Toronto attended this seminar.
  • April 2016: A new session titled as "Laboratory Earthquakes: from shallow to deep, slow to fast, induced to triggered" is suggested for EGU 2016 . This session aim to bring together scientists from various disciplines, working on laboratory nano- and micro-earthquakes, whether slow or fast, shallow or deep, induced or triggered. Professor R.Paul Young as the convener of this session and other members of his research group will attend this conference. For more information click here.

2015

  • September 2015: Collaboration between University of Caltech and University of Toronto. In this collaboration Thomas Goebel (Post doctoral from Caltech University) and Paul Young's research group tried to understand the mechanism of triggered seismisity in laboratory scale. This was the start point on this project and more research will take place in the coming future.
  • May 2015: IMaGE with collaboration of Paul Young are hosting an Acoustic Emission Workshop and training event at the University of Toronto's Rock Fracture Dynamics Facility, May 14-15, 2015. For more detail Click here .

2014

  • July 2014: Mr. Ghaffari and coauthors B.D. Thompson (RFDF Alumni) and R.P. Young had their paper entitled "Complex networks and waveforms from acoustic emissions in laboratory earthquakes" published in Nonlinear Processes in Geophysics. Click here to view the paper.
  • July 2014: Mr. Ghaffari and coauthors Dr. Nasseri and Professor Young had their research presented in U of T News. Click here to see the full article, "Engineering a new kind of rock music"..
  • May 2014: Mr. Goodfellow will attend the ARMA conference in Minneapolis, June 1 - 4, to present the paper: Source Parameters of Acoustic Emissions Observed in Laboratory and Mine Environments.
  • May 2014: Mr. Ghaffari and his coauthors Dr. Nasseri and Dr. Young, had their paper entitled "Faulting of rocks in a three-dimensional stress field by micro-anticracks" published in Nature Scientific Reports.
  • May 2014: Mr. Goodfellow and Professor Young had their paper entitled "A laboratory acoustic emission experiment under in situ conditions" published in Geophysical Research Letters.
  • May 2014: The Council of Canadian Academies released a new report entitled "Environmental Impacts of Shale Gas Extraction in Canada". This report represents the work of a multidisciplinary panel of experts, of which Professor Paul Young, was a member. The Panel considered the state of knowledge of potential environmental impacts from the exploration, extraction, and development of Canada’s shale gas resources. Click here to view the full report.
  • April 2014: Dr. Nasseri and his coauthors Mr. Goodfellow, Mr. Lombos, and Dr. Young, had their paper entitled "3-D transport and acoustic properties of Fontainebleau sandstone during true-triaxial deformation experiments" published in the International Journal of Rock Mechanics and Mining Sciences. Click here to view the article.
  • March 2014: Mr. Ghaffari traveled to Denver, Colorado to participate in the American Physics Society March Meeting along with almost 10,000 other scientists. Mr. Ghaffari gave an oral presentation entitled "Listening to Anticracks in Laboratory Earthquakes".

2013

  • December 2013: The Rock Physics and Computational Geomechanics group traveled to San Francisco to participate in the AGU Annual Fall Meeting. Mr. Ghofrani, Mr. Ghaffari, and Mr. Goodfellow presented posters in the session "Advances in Rock Physics and Rock Mechanics - From Faults to Reservoirs" and Dr. Nasseri was invited to present the paper "Investigation of permeability anisotropy and polymodal fracture pattern development using a true-triaxial geophysical imaging cell" in the oral session.
  • November 2013: Professor Paul Young was featured in the leading dissemination resource; International Innovation North America. In the article entitled "Seismic Sounds" (Page 56 - 58), Dr. Young describes how the sounds that different rocks make under stress enable him and his group to see the processes that lead to earthquakes as they unfold.
  • June 2013: Mr. Goodfellow attended the American Rock Mechanics Association symposium held at the Westin Hotel in San Francisco and presented the papers: "Analysis of continuous Acoustic Emission waveform records from rock fracturing experiments"and "The influence of injection rate on Hydraulic Fracturing of Westerly granite" for which he was awarded the "ARMA Best Student Poster Award".
  • May 2013: Mr. Ghaffari and his coauthor Dr. Young, had their paper entitled "Acoustic-Friction Networks and the Evolution of Precursor Rupture Fronts in Laboratory Earthquakes" accepted for publication in Nature Scientific Reports.
  • April 2013: Mr. Ghofrani attended the EGU General Assembly in Vienna, Austria to present the paper ''A Computational Method for 3D Anisotropic Travel-time Tomography of Rocks in the Laboratory".
  • April 2013: Dr. Nasseri and his coauthors Mr. Goodfellow, Dr. Wanne and Dr. Young had their paper "Thermo-Hydro-Mechanical Properties of Cobourg Limestone" published in the International Journal of Rock Mechanics and Mining Sciences.
  • February 2013: Dr. Paul Young was awarded the Queen Elizabeth II Diamond Jubilee Medal for his service to scholarship and science in Canada.