Publications
Educational Publications
Educational Publications
Selected publications about earthquakes In plain language.
Filter Total Items: 2792
False positives in the identification of dynamic earthquake triggering False positives in the identification of dynamic earthquake triggering
Dynamic earthquake triggering is commonly identified through the temporal correlation between increased seismicity rates and global earthquakes that are possible triggering events. However, correlation does not imply causation. False positives may occur when unrelated seismicity rate changes coincidently occur at around the time of candidate triggers. We investigate the expected false...
Authors
Jeanne L. Hardebeck, Nicolas D. DeSalvio, Wenyuan Fan, Andrew J. Barbour
Impact of gas/liquid phase change of CO2 during injection for sequestration Impact of gas/liquid phase change of CO2 during injection for sequestration
CO2 sequestration in deep saline formations is an effective and important process to control the rapid rise in CO2 emissions. The process of injecting CO2 requires reliable predictions of the stress in the formation and the fluid pressure distributions – particularly since monitoring of the CO2 migration is difficult – to mitigate leakage, prevent induced seismicity, and analyze wellbore...
Authors
M. Karimi, Elizabeth S. Cochran, Mehrdad Massoudi, Noel Walkington, Matteo Pozzi, Kaushik Dayal
High-pass corner frequency selection and review tool for use in ground-motion processing High-pass corner frequency selection and review tool for use in ground-motion processing
Raw seismological waveform data contain noise from the instrument’s surroundings and the instrument itself that can dominate recordings at low and high frequencies. To use these data in ground‐motion modeling, the effects of noise on the signals must be reduced and the signals’ usable frequency range identified. We present automated procedures to efficiently reduce low‐frequency noise...
Authors
Maria E. Ramos-Sepulveda, Scott J. Brandenberg, Tristan E Buckreis, Grace Alexandra Parker, Jonathan P. Stewart
An empirical Green’s function approach for isolating directivity effects in earthquake ground-motion amplitudes An empirical Green’s function approach for isolating directivity effects in earthquake ground-motion amplitudes
In this study, we apply an empirical Green’s function (eGf) method within a ground‐motion modeling framework to mitigate trade‐offs between source, path, and site effects. Many physical processes contribute to spatial variations in observed ground motions, including earthquake radiation pattern, directivity, variable path attenuation, and site effects. Current nonergodic ground‐motion...
Authors
Grace Alexandra Parker, Annemarie S. Baltay Sundstrom, Evan Tyler Hirakawa
Meet the people where they are: Assessing user needs for aftershock forecast products in El Salvador, Mexico and the United States Meet the people where they are: Assessing user needs for aftershock forecast products in El Salvador, Mexico and the United States
Aftershock forecasts can help communities reduce their seismic risk by conveying how many aftershocks can be expected following a large earthquake, and how the expected number of aftershocks and their corresponding ground shaking evolves over time and space. Prior work finds that graphical forecast products may communicate such information better than only text or numbers. To identify...
Authors
Max Schneider, Anne Wein, Sara K. McBride, Nicholas van der Elst, Julia Becker, Raul Castro, Manuel Diaz, Hector Gonzalez-Huizar, Jeanne L. Hardebeck, Andrew J. Michael, Luis E. Mixco, Morgan T. Page
Bayesian ETAS modeling for the Pacific Northwest: Uncovering effects of tectonic regimes, regional differences, and swarms on aftershock parameters Bayesian ETAS modeling for the Pacific Northwest: Uncovering effects of tectonic regimes, regional differences, and swarms on aftershock parameters
The Pacific Northwest (PNW) of North America has high seismic hazard due to numerous earthquake sources under populated areas. It hosts several tectonic regimes and subregional seismic zones that are hypothesized to have different patterns of earthquake and aftershock occurrence. It is also predisposed to earthquake swarms, which can complicate the statistical modeling of these patterns...
Authors
Max Schneider, Michael Barall, Peter Guttorp, Jeanne L. Hardebeck, Andrew J. Michael, Morgan T. Page, Nicholas van der Elst
Dendroseismological investigation of redwood trees along the North Coast section of the San Andreas Fault Dendroseismological investigation of redwood trees along the North Coast section of the San Andreas Fault
Sequoia sempervirens (coast redwood) tree rings have the potential to annually resolve late-Holocene earthquakes on the northern San Andreas Fault based on direct (e.g., physical damage) and indirect (e.g., co-seismic environmental change) impacts, but scarcity of suitable samples and challenges crossdating this long-lived species have limited progress. More precise dating of the pre...
Authors
Allyson L. Carroll, Belle E. Philibosian, Stephen C. Sillett, Marie E. Antoine, Özgür Kozaci
Factors influencing landslide occurrence in low-relief formerly glaciated landscapes: Landslide inventory and susceptibility analysis in Minnesota, USA Factors influencing landslide occurrence in low-relief formerly glaciated landscapes: Landslide inventory and susceptibility analysis in Minnesota, USA
In landscapes recently impacted by continental glaciation, landslides may occur where topographic relief has been generated by the drainage of glacial lakes and ensuing post-glacial fluvial network development into unconsolidated glacially derived sediments and exhumed bedrock. To investigate linkages among environmental variables, post-glacial landscape development, and landslides, we...
Authors
Laura Triplett, Morena N Hammer, Stephen B. DeLong, Karen B. Gran, Carrie E. Jennings, Zachary T. Engle, Julie K. Bartley, Dylan J. Blumentritt, Andy Breckenridge, Stephanie Day, Melissa A. Kohout, Philip H. Larson, Jeni A. McDermott, Emilie Richard
Overview of The SCEC/USGS Community Stress Drop Validation Study using the 2019 Ridgecrest earthquake sequence Overview of The SCEC/USGS Community Stress Drop Validation Study using the 2019 Ridgecrest earthquake sequence
We present initial findings from the ongoing Community Stress Drop Validation Study to compare spectral stress‐drop estimates for earthquakes in the 2019 Ridgecrest, California, sequence. This study uses a unified dataset to independently estimate earthquake source parameters through various methods. Stress drop, which denotes the change in average shear stress along a fault during...
Authors
Rachel E. Abercrombie, Annemarie S. Baltay Sundstrom, Shanna Chu, Taka’aki Taira, Dino Bindi, Oliver S. Boyd, Xiaowei Chen, Elizabeth S. Cochran, Emma Devin, Douglas Dreger, William Ellsworth, Fan Wenyuan, Rebecca Harrington, Yihe Huang, Kilian Kemna, Meichen Liu, Adrien Oth, Grace Alexandra Parker, Colin Pennington, Matteo Picozzi, Christine J. Ruhl, Peter Shearer, Daniele Spallarossa, Daniel Trugman, Ian Vandevert, Qimin Wu, Clara Yoon, Ellen Yu, Gregory C. Beroza, Tom Eulenfeld, Trey Knudson, Kevin Mayeda, Paola Morasca, James S. Neely, Jorge I. Roman-Nieves, Claudio Satriano, Mariano Supino, William R. Walter, Ralph Archuleta, Gail Marie Atkinson, Giovanna Calderoni, Chen Ji, Hongfeng Yang, Jiewen Zhang
Introduction to the special section on improving measurements of earthquake source parameters Introduction to the special section on improving measurements of earthquake source parameters
Earthquake source parameters such as magnitude, seismic moment, source dimension, stress drop, and radiated energy are fundamental to understanding earthquake physics, and are also key ingredients in earthquake ground‐motion modeling, rupture simulation, and statistical seismology. However, the uncertainties in these parameters estimated from the radiated seismic wavefield are large due...
Authors
Annemarie S. Baltay Sundstrom, Rachel E. Abercrombie, Adrien Oth, Takahiko Uchide
Increased flood exposure in the Pacific Northwest following earthquake-driven subsidence and sea-level rise Increased flood exposure in the Pacific Northwest following earthquake-driven subsidence and sea-level rise
Climate-driven sea-level rise is increasing the frequency of coastal flooding worldwide, exacerbated locally by factors like land subsidence from groundwater and resource extraction. However, a process rarely considered in future sea-level rise scenarios is sudden (over minutes) land subsidence associated with great (>M8) earthquakes, which can exceed 1 m. Along the Washington, Oregon...
Authors
Tina Dura, William Chilton, David Small, Andra Garner, Andrea D. Hawkes, Diego Melgar, Simon E. Engelhart, Lydia M. Staisch, Robert C. Witter, Alan Nelson, Harvey Kelsey, Jonathan Allan, David S. Bruce, Jessica DePaolis, Mike Priddy, Richard W. Briggs, Robert Weiss, SeanPaul La Selle, Michael J. Willis, Benjamin P. Horton
Destruction and transformation: Lessons learned from the 2015 Gorkha, Nepal, earthquake Destruction and transformation: Lessons learned from the 2015 Gorkha, Nepal, earthquake
No abstract available.
Authors
Surya Narayan Shrestha, Susan E. Hough