Exciting news! We're transitioning to the Statewide California Earthquake Center. Our new website is under construction, but we'll continue using this website for SCEC business in the meantime. We're also archiving the Southern Center site to preserve its rich history. A new and improved platform is coming soon!
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Charles G. Sammis

University of Southern California

Expertise: Rock Mechanics and Mineral Physics
About Me Publications
Lippoldt, R. C., & Sammis, C. G. (2017, 08). A Simple Spring-Mass-Dashpot Model for Slow Earthquakes on a Viscous Fault . Poster Presentation at 2017 SCEC Annual Meeting. SCEC Contribution 7669
Lippoldt, R. C., Porritt, R. W., & Sammis, C. G. (2016, 08). Constraining the velocity structure near the tremorogenic portion of the San Andreas Fault near Parkfield, CA using Ambient Noise Tomography . Poster Presentation at 2016 SCEC Annual Meeting. SCEC Contribution 6999
Sammis, C. G., & Smith, S. W. (2012). The collective synchronization of great earthquakes. Nature, (submitted). SCEC Contribution 1668
Sammis, C. G., & Smith, S. W. (2012). Non-Volcanic Seismic Tremor, Phase-Locking, and The Global Clustering of Great Earthquakes. Geophysical Research Letters, (in preparation). SCEC Contribution 1640
Goebel, T. H., Becker, T. W., Sammis, C. G., Dresen, G., & Schorlemmer, D. (2014). Off-fault damage and acoustic emission distributions during the evolution of structurally-complex faults over series of stick-slip events. Geophysical Journal International, 197(3), 1705-1718. doi: 10.1093/gji/ggu074. SCEC Contribution 1902
Goebel, T. H., Candela, T., Sammis, C. G., Becker, T. W., & Dresen, G. (2014). Seismic event distributions and off-fault damage during frictional sliding of saw-cut surfaces with predefined roughness. Geophysical Journal International,. doi: 10.1093/gji/ggt401. SCEC Contribution 1901
Sammis, C. G., & Smith, S. W. (2013). Triggered tremor, phase-locking, and the global clustering of great earthquakes. Tectonophysics, 589, 167–171. doi: 10.1016/j.tecto.2012.12.021. SCEC Contribution 1968
Goebel, T. H., Schorlemmer, D., Becker, T. W., Dresen, G., & Sammis, C. G. (2013). Acoustic emissions document stress changes over many seismic cycles in stick-slip experiments. Geophysical Research Letters, 40(10), 2049-2054. doi: 10.1002/grl.50507. SCEC Contribution 1854
Goebel, T. H., Sammis, C. G., Becker, T. W., Dresen, G., & Schorlemmer, D. (2013). A comparision of seismicity characteristics and fault structure in stick-slip experiments and nature. Pure and Applied Geophysics,. doi: 10.1007/s00024-013-0713-7. SCEC Contribution 1849
Goebel, T. H., Becker, T. W., Schorlemmer, D., Stanchits, S. A., Sammis, C. G., Rybacki, E., & Dresen, G. (2012). Identifying fault heterogeneity through mapping spatial anomalies in acoustic emission statistics. Journal of Geophysical Research: Solid Earth, 117(B3), B03310. doi: 10.1029/2011JB008763. SCEC Contribution 1900
Bhat, H. S., Rosakis, A. J., & Sammis, C. G. (2012). A Micromechanics Based Constitutive Model For Brittle Failure at High Strain Rates. Journal of Applied Mechanics, 79(3). doi: 10.1115/1.4005897. SCEC Contribution 1598
Bhat, H. S., Biegel, R. L., Rosakis, A. J., & Sammis, C. G. (2010). The Effect of Asymmetric Damage on Dynamic Shear Rupture Propagation II: With Mismatch in Bulk Elasticity. Tectonophysics,. doi: 10.1016/j.tecto.2010.03.016. SCEC Contribution 1236
Biegel, R. L., Bhat, H. S., Sammis, C. G., & Rosakis, A. J. (2010). The Effect of Asymmetric Damage on Dynamic Shear Rupture Propagation I: No Mismatch in Bulk Elasticity. Tectonophysics,. doi: 10.1016/j.tecto.2010.03.020. SCEC Contribution 1235
Sammis, C. G., Rosakis, A. J., & Bhat, H. S. (2009). Effects of Off-Fault Damage on Earthquake Rupture Propagation: Experimental Studies. Pure and Applied Geophysics,. doi: 10.1007/s00024-009-0512-3. SCEC Contribution 1227
Fischer, A. D., & Sammis, C. G. (2009). Dynamic driving of Small Shallow Events During Strong Motion. Bulletin of the Seismological Society of America,. doi: 10.1785/0120080293. SCEC Contribution 1224
Sammis, C. G., & Ben-Zion, Y. (2008). Mechanics of grain‐size reduction in fault zones. Journal of Geophysical Research, 113, B02306. doi: 10.1029/2006JB004892. SCEC Contribution 1372
Fischer, A. D., Peng, Z., & Sammis, C. G. (2008). Dynamic triggering of high-frequency bursts by strong motions during the 2004 Parkfield earthquake sequence. Geophysical Research Letters, 35(12), n/a-n/a. doi: 10.1029/2008GL033905. SCEC Contribution 1201
Fischer, A. D., Sammis, C. G., Chen, Y., & Teng, T. (2008). Dynamic Triggering by Strong-Motion P and S Waves: Evidence from the 1999 Chi-Chi, Taiwan, Earthquake. Bulletin of the Seismological Society of America, 98(2), 580-592. doi: 10.1785/0120070155. SCEC Contribution 1129
Biegel, R. L., Sammis, C. G., & Rosakis, A. J. (2008). An experimental study of the effect of off-fault damage on the velocity of a slip pulse. Journal of Geophysical Research, 113, B04302. doi: 10.1029/2007JB005234. SCEC Contribution 1126
Dolan, J. F., Bowman, D., & Sammis, C. G. (2007). Long-Range and Long-Term Fault Interactions in Southern California. Geology, 35(9), 855-858. doi: 10.1130/G23789A.1. SCEC Contribution 1010
Biegel, R. L., & Sammis, C. G. (2007). Interaction of a Dynamic Rupture on a Fault Plane with Short Frictionless Fault Branches . Pure and Applied Geophysics, 164(10), 1881-1904. doi: 10.1007/s00024-007-0251-2. SCEC Contribution 1002
Kohen-Kadosh, S. Z., Sammis, C. G., & Bowman, D. (2006). An observational test of the Stress Accumulation model based on seismicity preceding the 1992 Landers, CA earthquake. Tectonophysics, 413(1-2), 39-52. doi: 10.1016/j.tecto.2005.10.032. SCEC Contribution 937
Manighetti, I., Campillo, M., Sammis, C. G., Mai, P. M., & King, G. C. (2005). Evidence for self-similar, triangular slip distributions on earthquakes: implications for earthquake and fault mechanics. Journal of Geophysical Research, 110(B05302). doi: 10.1029/2004JB003174. SCEC Contribution 894
Rice, J. R., & Sammis, C. G. (2005). Off-Fault Secondary Failure Induced by a Dynamic Slip Pulse. Bulletin of the Seismological Society of America, 95(1), 109-134. doi: 10.1785/0120030166. SCEC Contribution 732
Sammis, C. G., Bowman, D., & King, G. C. (2004). Anomalous Seismicity and Accelerating Moment Release Preceding the 2001 and 2002 Earthquakes in Northern Baja California, Mexico. Pure and Applied Geophysics, 161(11-12), 2369-2378. doi: 10.1007/s00024-004-2569-3. SCEC Contribution 698
Bowman, D., & Sammis, C. G. (2004). Intermittent Criticality and the Gutenberg-Richter Distribution. Pure and Applied Geophysics, 161(9-10), 1945-1956. doi: 10.1007/s00024-004-2541-z. SCEC Contribution 602
Ben-Zion, Y., & Sammis, C. G. (2003). Characterization of Fault Zones. Pure and Applied Geophysics, 160(3-4), 677-715. doi: 10.1007/PL00012554. SCEC Contribution 590
Sammis, C. G., & Rice, J. R. (2001). Repeating Earthquakes as Low-Stress-Drop Events at a Border between Locked and Creeping Fault Patches. Bulletin of the Seismological Society of America, 91(3), 532-537. doi: 10.1785/0120000075. SCEC Contribution 611
Ben-Zion, Y., Sammis, C. G., & Henyey, T. (1999). Perspective on the Field of Physics of Earthquakes. Seismological Research Letters, 70(4), 428-431. SCEC Contribution 469
Bowman, D., Ouillon, G., Sammis, C. G., Sornette, A., & Sornette, D. (1998). An Observational Test of the Critical Earthquake Concept. Journal of Geophysical Research, 103(B10), 24359-24372. doi: 10.1029/98JB00792. SCEC Contribution 417
An, L., & Sammis, C. G. (1996). Development of Strike-Slip Faults: Shear Experiments in Granular Materials and Clay Using a New Technique. Journal of Structural Geology, 18(8), 1061-1077. doi: 10.1016/0191-8141(96)00012-0 . SCEC Contribution 425
Saleur, H., Sammis, C. G., & Sornette, D. (1996). Renormalization Group Theory of Earthquakes. Nonlinear Processes in Geophysics, 3(2), 102-109. doi: 10.5194/npg-3-102-1996. SCEC Contribution 423
Sammis, C. G. (1996). Fractal Fragmentation and Frictional Stability in Granular Materials. Dordrecht, Netherlands: Springer Netherlands. doi: 10.1007/978-94-011-5520-5_3. SCEC Contribution 422
Sammis, C. G., Sornette, D., & Saleur, H. (1996). Complexity and Earthquake Forecasting. In J. B. Rundle, W. Klein, & D. L. Turcotte (Eds.), Reduction & Predictability of Natural Disasters, in SFI Studies on the Sciences of Complexity, (, pp. 143-156) Boston, USA: Addison Wesley SCEC Contribution 333
An, L., & Sammis, C. G. (1996). A Cellular Automaton for the Development of Crustal Shear Zones. Tectonophysics, 253(3-4), 247-270. doi: 10.1016/0040-1951(95)00062-3. SCEC Contribution 332
Saleur, H., Sammis, C. G., & Sornette, D. (1996). Discrete Scale Invariance, Complex Fractal Dimensions and log-periodic fluctuations in Seismicity. Journal of Geophysical Research, 101(B8), 17661-17677. doi: 10.1029/96JB00876. SCEC Contribution 326
Sornette, D., & Sammis, C. G. (1995). Complex Critical Exponents from Renormalization Group theory of Earthquakes: Implications for Earthquake Predictions. Journal de Physique I, 5(5), 607-619. doi: 10.1051/jp1:1995154 . SCEC Contribution 156
Robertson Haver, M., Sammis, C. G., Sahimi, M., & Martin, A. (1995). Fractal Analysis of Three-Dimensional Spatial Distributions of Earthquakes with a Percolation Interpretation. Journal of Geophysical Research, 100(B1), 609-620. SCEC Contribution 117
Scott, D., Lockner, D. A., Byerlee, J., & Sammis, C. G. (1994). Triaxial Testing of Lopez Fault Gouge at 150 MPa Mean Effective Stress. Pure and Applied Geophysics, 142(3/4), 749-775. doi: 10.1007/BF00876063. SCEC Contribution 103
Scott, D., Marone, C. J., & Sammis, C. G. (1994). The Apparent Friction of Granular Fault Gouge in Sheared Layers. Journal of Geophysical Research, 99(B4), 7231-7246. SCEC Contribution 102
Sahimi, M., Robertson Haver, M., & Sammis, C. G. (1993). Fractal Distribution of Earthquake Hypocenters and Its Relation to Fault Patterns and Percolation. Physical Review Letters, 70(14), 2186-2189. doi: 10.1103/PhysRevLett.70.2186. SCEC Contribution 51
Nakanishi, K., Sahimi, M., Robertson Haver, M., Sammis, C. G., & Rintoul, M. D. (1993). Fractal Properties of the Distribuation of Earthquake Hypocenters. Journal de Physique I, 3(3), 733-739. doi: 10.1051/jp1:1993158 . SCEC Contribution 334
Sahimi, M., Robertson Haver, M., & Sammis, C. G. (1992). Relation Between the Earthquake Statistics and Fault Patterns, and Fractals and Percolation. Physica A, 191(1-4), 57-68. doi: 10.1016/0378-4371(92)90506-L. SCEC Contribution 50
Steacy, S., & Sammis, C. G. (1992). A Damage Mechanics Model for Fault Zone Friction. Journal of Geophysical Research, 97(B1), 587-594. SCEC Contribution 336
King, G. C., & Sammis, C. G. (1992). The Mechanisms of Finite Brittle Strain. Pure and Applied Geophysics, 138(4), 611-640. doi: 10.1007/BF00876341. SCEC Contribution 335

Last updated May 06, 2019.