Publications
Filter Total Items: 2062
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
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
Comparative properties of saponitic fault gouge and serpentinite muds cored from mud volcanoes of the Mariana subduction zone Comparative properties of saponitic fault gouge and serpentinite muds cored from mud volcanoes of the Mariana subduction zone
We obtained 12 core samples for physical and chemical characterization from three serpentinite mud volcanoes (Yinazao, Asùt Tesoru, and Fantangisña) located on the forearc of the Mariana subduction system, that were drilled during International Ocean Discovery Program Expedition 366. Two samples from the Fantangisña mud volcano are interpreted to be clay-rich fault gouges derived from...
Authors
Diane E. Moore, C.A. Morrow, David A. Lockner, Barbara A. Bekins
Seismic moment and local magnitude scales in Ridgecrest, CA from the SCEC/USGS Community Stress Drop Validation Study Seismic moment and local magnitude scales in Ridgecrest, CA from the SCEC/USGS Community Stress Drop Validation Study
We illustrate the systematic difference between moment magnitude and local magnitude caused by underlying earthquake source physics, using seismic moments submitted to the Statewide California Earthquake Center/United States Geological Survey Community Stress Drop Validation Study 2019 Ridgecrest data set. While the relationship between seismic moment and moment magnitude ( M or Mw) of...
Authors
Annemarie S. Baltay Sundstrom, Rachel E. Abercrombie
The GorDAS Distributed Acoustic Sensing experiment above the Cascadia locked zone and subducted Gorda Slab The GorDAS Distributed Acoustic Sensing experiment above the Cascadia locked zone and subducted Gorda Slab
The southernmost portion of the Cascadia Subduction zone in Northern California produces high rates of moderate and large earthquakes owing to subduction of the Gorda slab and deformation associated with the Mendocino Triple Junction. Distributed Acoustic Sensing (DAS) is rapidly advancing as a method for detecting earthquakes and imaging crustal structure. We have begun a long-term DAS...
Authors
Jeffrey J. McGuire, Andrew J. Barbour, Connie Stewart, Victor Yartsev, Martin Karrenbach, Mark Hemphill-Haley, Robert C. McPherson, Kari Stockdale, Clara Yoon, Theresa Marie Sawi
Migration of seismicity from the mantle to the upper crust beneath Harrat Lunayyir volcanic field, Saudi Arabia Migration of seismicity from the mantle to the upper crust beneath Harrat Lunayyir volcanic field, Saudi Arabia
Harrat Lunayyir is a volcanic field in Saudi Arabia that experienced a Mw~5.4 earthquake driven by an upper-crustal dike intrusion in May 2009. This volcanic field has exhibited numerous forms of volcanic seismicity both prior to and since the 2009 dike intrusion. Significantly, earthquakes within the lithospheric mantle and, rarely, the lower crust are present in the two-decade long...
Authors
Alexander R. Blanchette, Simon L. Klemperer, Walter D. Mooney, Turki A. Sehli
Implications of physics-based M9 ground motions on liquefaction-induced damage in the Cascadia Subduction Zone: Looking forward and backward Implications of physics-based M9 ground motions on liquefaction-induced damage in the Cascadia Subduction Zone: Looking forward and backward
Given the likelihood of future M9 Cascadia Subduction Zone (CSZ) earthquakes, various estimates of the resulting, regional ground motions have been made, including a suite of 30 physics-based simulations that reflect key modeling uncertainties. However, because the last CSZ interface rupture occurred in 1700 CE, the shaking expected in such an event is especially uncertain, as are the...
Authors
Ryan A. Rasanen, Alex R. Grant, Andrew James Makdisi, Brett W. Maurer, Erin A. Wirth