Publications
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Detection of aseismic slip and poroelastic reservoir deformation at the North Brawley Geothermal Field from 2009 to 2019
The North Brawley Geothermal Field, located within the Brawley Seismic Zone of Southern California, presents a case study for understanding seismic hazards linked to fluid injection and geothermal energy extraction. An earthquake swarm near the geothermal field in 2012 included two earthquakes with magnitudes greater than 5 and was potentially preceded by a years-long aseismic slip transient. To b
Authors
Kathryn Zerbe Materna, Andrew Barbour, Junle Jiang, Mariana Eneva
Interaction between climate and tectonics in the northern Lesser Antilles inferred from the last interglacial shoreline on Barbuda island
In the context of increasing evidence of plate interface coupling variability in subduction zones, there is a need to extend the short time window given by instrumental data and to gather data over multiple time and spatial scales. We hence investigated the long-term topography on Barbuda island, located in the northern part of the Lesser Antilles, west of the Caribbean subduction zone. Following
Authors
Jennifer Weil-Accardo, Nathalie Feuillet, Belle E. Philibosian, Abel Guihou, Eric Jacques, Guy Cabioch, André Anglade, Anne-Sophie Mériaux, Pierre Deschamps
Overview of the morphology and chemistry of diagenetic features in the clay-rich Glen Torridon Unit of Gale Crater, Mars
The clay-rich Glen Torridon region of Gale crater, Mars, was explored between sols 2300 and 3007. Here, we analyzed the diagenetic features observed by Curiosity, including veins, cements, nodules, and nodular bedrock, using the ChemCam, Mastcam, and Mars Hand Lens Imager instruments. We discovered many diagenetic features in Glen Torridon, including dark-toned iron- and manganese-rich veins, magn
Authors
Patrick J. Gasda, Jade Comellas, A Essunfeld, D. Das, Alex B Bryk, Erwin Dehouck, Susanne P. Schwenzer, Laura Crossey, Kenneth E. Herkenhoff, Jeffrey B. Johnson, Horton E. Newsom, Nina L. Lanza, William Rapin, Walter Goetz, Pierre-Yves Meslin, John C. Bridges, Ryan Anderson, Gaël David, S M R Turner, M T Thorpe, Linda C. Kah, Jens Frydenvang, Rachel Kronyak, G. Caravaca, Ann M. Ollila, Stephane Le Mouelic, M Nellessen, Megan Hoffman, Deirdra M. Fey, Agnes Cousin, Roger C. Wiens, Sam M. Clegg, Sylvestre Maurice, Olivier Gasnault, Dorothy Delapp, A. Reyes-Newell
2022 Crustal Deformation Modeling Workshop Report
The 2022 Crustal Deformation Modeling Workshop was held June 20–24 at the Colorado School of Mines in Golden, Colorado. The workshop included two days of tutorials on the use of the open-source software PyLith for crustal deformation modeling followed by three days of science talks and discussions. The workshop focused on three primary themes: (1) Earthquake cycle modeling; (2) Inversions for faul
Authors
Brad T. Aagaard, Sylvain Barbot, Brittany Erickson, Matthew Knepley, Mark Simons, Charles Williams
Improving the Development Pipelines for USGS Earthquake Hazards Program Real-Time and Scenario Products
The real-time and scenario products of the U.S. Geological Survey (USGS) Earthquake Hazards Program, such as the ComCat catalog, Did You Feel It?, ShakeMap, ShakeCast, and PAGER, are highly visible and used by a wide variety of stakeholders. We propose two significant enhancements to the development pipelines for the Earthquake Hazards Program real-time and scenario products that have far-reaching
Authors
Brad T. Aagaard, David J. Wald, Eric M. Thompson, Mike Hearne, Lisa Sue Schleicher
Improved resolution across the Global Seismographic Network: A new era in low-frequency seismology
The Global Seismographic Network (GSN)—a global network of ≈150 very broadband stations—is used by researchers to study the free oscillations of the Earth (≈0.3–10 mHz) following large earthquakes. Normal‐mode observations can provide information about the radial density and anisotropic velocity structure of the Earth (including near the core–mantle boundary), but only when signal‐to‐noise ratios
Authors
Adam T. Ringler, Robert E. Anthony, P. Thompson Davis, Carl Ebeling, K. Hafner, R. Mellors, S. Schneider, David C. Wilson
Working with dynamic earthquake rupture models: A practical guide
Dynamic rupture models are physics‐based simulations that couple fracture mechanics to wave propagation and are used to explain specific earthquake observations or to generate a suite of predictions to understand the influence of frictional, geometrical, stress, and material parameters. These simulations can model single earthquakes or multiple earthquake cycles. The objective of this article is t
Authors
Marlon D. Ramos, Prithvi Thakur, Yihe Huang, Ruth A. Harris, Kenny J. Ryan
The potential of using fiber optic distributed acoustic sensing (DAS) in earthquake early warning applications
As the seismological community embraces fiber optic distributed acoustic sensing (DAS), DAS arrays are becoming a logical, scalable option to obtain strain and ground‐motion data for which the installation of seismometers is not easy or cheap, such as in dense offshore arrays. The potential of strain data in earthquake early warning (EEW) applications has been recently demonstrated using records f
Authors
Noha Farghal, Jessie Kate Saunders, Grace Alexandra Parker
Planetary Aeolian landforms: An introduction to the Fifth Planetary Dunes Workshop Special Issue
Aeolian landforms are widespread in our solar system. Understanding the exact nature and processes of formation of these features are challenging tasks necessitating a strong collaboration between scientists with different skills and scientific backgrounds. This paper describes the special issue for the 5th International Planetary Dunes Workshop, which includes 15 research papers and three comment
Authors
Simone Silvestro, Timothy N. Titus
Considerations for creating equitable and inclusive communication campaigns associated with ShakeAlert, the earthquake early warning system for the West Coast of the USA
PurposeThe 2019 Global Assessment Report on Disaster Risk Reduction (GAR) cites earthquakes as the most damaging natural hazard globally, causing billions of dollars of damage and killing thousands of people. Earthquakes have the potential to drastically impact physical, social and economic landscapes; to reduce this risk, earthquake early warning (EEW) systems have been developed. However, these
Authors
Mariah Ramona Jenkins, Sara McBride, Meredith Morgoch, Hollie Smith
Insights into the geometry and evolution of the southern San Andreas Fault from geophysical data, southern California
Two new joint gravity-magnetic models in northern Coachella Valley provide additional evidence for a steep northeast dip of the Mission Creek strand of the southern San Andreas fault (southern California, USA). Gravity modeling indicates a steep northeast dip of the Banning fault in the upper 1–2 km in northern Coachella Valley. The Mission Creek strand and its continuation to the southeast (Coach
Authors
Victoria Langenheim, Gary S. Fuis
Preliminary geologic map of early Miocene felsic eruptive centers in the Aquarius Mountains, west-central Arizona
The first author, Gary S. Fuis, conducted this mapping in the summer of 1967 in partial fulfillment of the entry requirements into the Ph.D program of the Division of Geological and Planetary Sciences of the California Institute of Technology, Pasadena, Calif. The area mapped lies wholly within the Fort Rock Ranch, a private ranch spanning ~50 square miles in Mohave and Yavapai Counties, Arizona.
Authors
Gary S. Fuis, J. Luke Blair