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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Jeanne L. Hardebeck

USGS
Research Geophysicist

Expertise: Stress triggering of earthquakes, crustal stress, fault mechanics
 
 
About Me Publications
Schneider, M., Wein, A., van der Elst, N. J., McBride, S. K., Becker, J. S., Castro, R. R., Diaz, M., Gonzalez-Huizar, H., Hardebeck, J. L., Michael, A. J., Mixco, L., Page, M. T., & Palomo, J. (2023, 09). Visual Communication of Aftershock Forecasts Driven by User Needs . Poster Presentation at 2023 SCEC Annual Meeting. SCEC Contribution 13289
Hardebeck, J. L. (2023, 09). Physical Properties of the Crust Influence Aftershock Locations. Poster Presentation at 2023 SCEC Annual Meeting. SCEC Contribution 12999
Luttrell, K., Hardebeck, J. L., & Marshall, S. T. (2023, 09). Unboxing the Community Stress Model: Progress, Challenges, and Opportunities in Describing the Fundamental Forces Behind Earthquakes. Oral Presentation at 2023 SCEC Annual Meeting. SCEC Contribution 12858
Shelly, D. R., Goldberg, D. E., Skoumal, R. J., Hardebeck, J. L., Materna, K. Z., Yoon, C. E., Yeck, W. L., & Earle, P. (2023, 09). The 2022 M 6.4 Ferndale, California Earthquake Sequence: A Piece of the Puzzle at the Mendocino Triple Junction. Poster Presentation at 2023 SCEC Annual Meeting. SCEC Contribution 12821
Nevitt, J. M., Brooks, B. A., Hardebeck, J. L., & Aagaard, B. T. (2022, 09). Geologic inheritance of the 2019 M7.1 Ridgecrest earthquake source faults and the resulting slip distribution. Poster Presentation at 2022 SCEC Annual Meeting. SCEC Contribution 12492
Schneider, M., Guttorp, P., van der Elst, N. J., Barall, M. J., Michael, A. J., Hardebeck, J. L., & Page, M. T. (2022, 09). Bayesian ETAS for Improved Earthquake Rate Models for the Pacific Northwest. Poster Presentation at 2022 SCEC Annual Meeting. SCEC Contribution 12235
Wilson, L. J., Luttrell, K. M., & Hardebeck, J. L. (2021, 08). Understanding Crustal Stress Heterogeneity in the Los Angeles Region using Focal Mechanism Inversions and Shear Wave Splitting Fast Velocities. Poster Presentation at 2021 SCEC Annual Meeting. SCEC Contribution 11425
van der Elst, N. J., McBride, S. K., Hardebeck, J. L., Michael, A. J., & Page, M. T. (2021, 08). Communicating Aftershock Forecasts for Situational Awareness During Humanitarian Response. Poster Presentation at 2021 SCEC Annual Meeting. SCEC Contribution 11307
Hardebeck, J. L. (2021, 08). What Physical Properties Control Aftershock Locations?. Poster Presentation at 2021 SCEC Annual Meeting. SCEC Contribution 11264
Shelly, D. R., Skoumal, R. J., & Hardebeck, J. L. (2021, 08). Conjugate Rupture Patterns and Role of Fluids in the 2020 Maacama Fault, California Earthquake Swarm. Poster Presentation at 2021 SCEC Annual Meeting. SCEC Contribution 11168
Abercrombie, R. E., Trugman, D. T., Shearer, P. M., Chen, X., Zhang, J., Pennington, C. N., Hardebeck, J. L., Goebel, T. H., & Ruhl, C. J. (2020, 08). Does earthquake stress drop increase with depth? . Poster Presentation at 2020 SCEC Annual Meeting. SCEC Contribution 10725
Luttrell, K. M., & Hardebeck, J. L. (2020, 08). Reconciling crustal stress heterogeneity from borehole breakouts and earthquake focal mechanisms. Poster Presentation at 2020 SCEC Annual Meeting. SCEC Contribution 10639
Nevitt, J. M., Brooks, B. A., Hardebeck, J. L., & Aagaard, B. T. (2020, 08). Slip distribution controlled by inherited fault geometry during the 2019 M7.1 Ridgecrest earthquake. Poster Presentation at 2020 SCEC Annual Meeting. SCEC Contribution 10550
Hardebeck, J. L. (2020, 07). A Stress-Similarity Triggering Model for Aftershocks of the Mw 6.4 and 7.1 Ridgecrest Earthquakes. Oral Presentation at 2020 SCEC Annual Meeting. SCEC Contribution 10192
Barall, M., Michael, A. J., & Hardebeck, J. L. (2019, 08). The USGS Automatic Aftershock Forecasting System. Poster Presentation at 2019 SCEC Annual Meeting. SCEC Contribution 9562
Hardebeck, J. L., Michael, A. J., Page, M. T., van der Elst, N. J., Barall, M., Llenos, A. L., Martinez, E. M., & McBride, S. K. (2019, 08). Aftershock forecasts following the M6.4 and M7.1 Ridgecrest, California, earthquakes of July 2019. Poster Presentation at 2019 SCEC Annual Meeting. SCEC Contribution 9467
Luttrell, K. M., & Hardebeck, J. L. (2019, 04). Heterogeneity of Shallow Crustal Stress Estimated from Borehole Breakouts and Local Earthquake Focal Mechanism Inversions in the Los Angeles Basin. Oral Presentation at SSA Annual Meeting. SCEC Contribution 9033
Luttrell, K. M., & Hardebeck, J. L. (2018, 08). Estimates of Shallow Crustal Stress Heterogeneity Length Scale from Borehole Breakouts and Local Earthquake Focal Mechanism Inversions in the Los Angeles Basin. Poster Presentation at 2018 SCEC Annual Meeting. SCEC Contribution 8803
Hardebeck, J. L., Llenos, A. L., Michael, A. J., Page, M. T., & van der Elst, N. J. (2018, 08). Updated California Aftershock Parameters. Poster Presentation at 2018 SCEC Annual Meeting. SCEC Contribution 8361
Shelly, D. R., & Hardebeck, J. L. (2018, 08). Illuminating faulting complexity of the 2017 Yellowstone (Maple Creek) earthquake swarm. Poster Presentation at 2018 SCEC Annual Meeting. SCEC Contribution 8323
Luttrell, K. M., & Hardebeck, J. L. (2017, 08). Borehole Breakouts Versus Earthquake Focal Mechanisms as Stress Field Orientation Indicators in Southern California: Should We Agree to Disagree?. Poster Presentation at 2017 SCEC Annual Meeting. SCEC Contribution 7642
Hardebeck, J. L. (2017, 07). Are the Stress Drops of Small Earthquakes Good Predictors of the Stress Drops of Larger Earthquakes?. Poster Presentation at 2017 SCEC Annual Meeting. SCEC Contribution 7345
Field, E. H., Milner, K. R., Hardebeck, J. L., Page, M. T., van der Elst, N. J., Jordan, T. H., Michael, A. J., Shaw, B. E., & Werner, M. J. (2016, 08). A Spatiotemporal Clustering Model for the Third Uniform California Earthquake Rupture Forecast (UCERF3-ETAS) – Toward an Operational Earthquake Forecast. Poster Presentation at 2016 SCEC Annual Meeting. SCEC Contribution 6920
Shelly, D. R., Hardebeck, J. L., Ellsworth, W. L., & Hill, D. P. (2016, 08). A new strategy for earthquake focal mechanisms using waveform-correlation-derived relative polarities and cluster analysis: Application to a fluid-driven earthquake swarm. Poster Presentation at 2016 SCEC Annual Meeting. SCEC Contribution 6766
Hardebeck, J. L. (2016, 07). Can tectonic loading be observed as interseismic stress rotation?. Poster Presentation at 2016 SCEC Annual Meeting. SCEC Contribution 6391
Wilson, L. J., Luttrell, K. M., & Hardebeck, J. L. (2021, 12). Understanding Crustal Stress Heterogeneity in Southern California using Focal Mechanism Inversions and Shear Wave Splitting Fast Velocities. Poster Presentation at AGU Fall Meeting. SCEC Contribution 11850
Abercrombie, R. E., Trugman, D. T., Shearer, P. M., Chen, X., Zhang, J., Pennington, C. N., Hardebeck, J. L., Goebel, T. W., & Ruhl, C. J. (2021). Does Earthquake Stress Drop Increase With Depth in the Crust?. Journal of Geophysical Research: Solid Earth, 126(10). doi: 10.1029/2021JB022314. SCEC Contribution 11037
Luttrell, K., & Hardebeck, J. (2021). A Unified Model of Crustal Stress Heterogeneity From Borehole Breakouts and Earthquake Focal Mechanisms. Journal of Geophysical Research: Solid Earth, 126(2). doi: 10.1029/2020JB020817. SCEC Contribution 10303
Hardebeck, J. L. (2020). A Stress-Similarity Triggering Model for Aftershocks of the Mw 6.4 and 7.1 Ridgecrest Earthquakes. Bulletin of the Seismological Society of America, 110(4), 1716–1727. doi: 10.1785/0120200015. SCEC Contribution 10118
Field, E. H., Jordan, T. H., Page, M. T., Milner, K. R., Shaw, B. E., Dawson, T. E., Biasi, G. P., Parsons, T., Hardebeck, J. L., Michael, A. J., Weldon, R. J., Powers, P. M., Johnson, K. M., Zeng, Y., Felzer, K. R., van der Elst, N. J., Madden, C., Arrowsmith, R., Werner, M. J., & Thatcher, W. R. (2017). A Synoptic View of the Third Uniform California Earthquake Rupture Forecast (UCERF3). Seismological Research Letters, 88(5), 1259-1267. doi: 10.1785/0220170045. SCEC Contribution 7165
Field, E. H., Milner, K. R., Hardebeck, J. L., Page, M. T., van der Elst, N. J., Jordan, T. H., Michael, A. J., Shaw, B. E., & Werner, M. J. (2017). A Spatiotemporal Clustering Model for the Third Uniform California Earthquake Rupture Forecast (UCERF3-ETAS): Toward an Operational Earthquake Forecast. Bulletin of the Seismological Society of America, 107(3), 1049-1081. doi: 10.1785/0120110177. SCEC Contribution 7163
Yu, J., Becker, T. W., Hardebeck, J. L., & SCEC CSM Working Group, .. (2013, 9). The SCEC Community Stress Model web site v.0.1. Poster Presentation at SCEC Annual Meeting 2013. SCEC Contribution 2043
Lin, G., Thurber, C. H., Zhang, H., Hauksson, E., Shearer, P. M., Waldhauser, F., Brocher, T. M., & Hardebeck, J. L. (2010). A California statewide three-dimensional seismic velocity model from both absolute and differential times. Bulletin of the Seismological Society of America, 100, 225-240. doi: 10.1785/0120090028. SCEC Contribution 1360
Hardebeck, J. L., & Michael, A. J. (2006). Damped regional-scale stress inversions: Methodology and examples for southern California and the Coalinga aftershock sequence. Journal of Geophysical Research: Solid Earth, 111(B11). doi: 10.1029/2005JB004144. SCEC Contribution 9086
Bakun, W., Aagaard, B. T., Dost, B., Ellsworth, W. L., Hardebeck, J. L., Harris, R. A., Ji, C., Johnston, M., Langbein, J. O., Lienkaemper, J. J., Michael, A. J., Murray, J. R., Nadeau, R. M., Reichle, M., Reasenberg, P., Roeloffs, E., Shakal, A., Simpson, R. W., & Waldhauser, F. (2005). Implications for prediction and hazard assessment from the 2004 Parkfield earthquake. Nature, 437(13 October 2005), 969-974. doi: 10.1038/nature04067. SCEC Contribution 920
Hardebeck, J. L. (2004). Stress Triggering and Earthquake Probability Estimates. Journal of Geophysical Research, 109(B04310). doi: 10.1029/2003JB002437. SCEC Contribution 764
Hardebeck, J. L., & Shearer, P. M. (2003). Using S/P Amplitude Ratios to Constrain the Focal Mechanisms of Small Earthquakes. Bulletin of the Seismological Society of America, 93(6), 2434-2444. doi: 10.1785/0120020236. SCEC Contribution 706
Shearer, P. M., Hardebeck, J. L., Astiz, L., & Richards-Dinger, K. B. (2003). Analysis of similar event clusters in aftershocks of the 1994 Northridge, California, earthquake. Journal of Geophysical Research, 108(B1), 2035. doi: 10.1029/2001JB000685. SCEC Contribution 653
Hardebeck, J. L., & Shearer, P. M. (2002). A New Method for Determining First-Motion Focal Mechanisms. Bulletin of the Seismological Society of America, 92(6), 2264-2276. doi: 10.1785/0120010200. SCEC Contribution 647
Hardebeck, J. L., & Hauksson, E. (2001). Crustal stress field in southern California and its implications for fault mechanics. Journal of Geophysical Research, 106(B10), 21859-21882. SCEC Contribution 541
Hardebeck, J. L., & Hauksson, E. (2001). Stress Orientations Obtained from Earthquake Focal Mechanisms: What Are Appropriate Uncertainty Estimates?. Bulletin of the Seismological Society of America, 91(2), 250-262. doi: 10.1785/0120000032. SCEC Contribution 493
Hardebeck, J. L., Nazareth, J., & Hauksson, E. (1998). The static stress change triggering model: Constraints from two southern California aftershock sequences. Journal of Geophysical Research, 103(B10), 24427-24437. SCEC Contribution 370
Hardebeck, J. L., & Hauksson, E. (1997). Static Stress Drop in the 1994 Northridge, California, Aftershock Sequence. Bulletin of the Seismological Society of America, 87(6), 1495-1501. SCEC Contribution 337

Last updated Sep 21, 2023.