Publications
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Evidence of active Quaternary deformation on the Great Valley fault system near Winters, northern California Evidence of active Quaternary deformation on the Great Valley fault system near Winters, northern California
The Great Valley fault system defines the tectonic boundary between the Coast Ranges and the Central Valley in California, is active throughout the Quaternary, and has been the source of several significant ( M > 6) historic earthquakes, including the 1983 M 6.5 Coalinga earthquake and the 1892 Vacaville–Winters earthquake sequence. However, the locations and geometries of individual...
Authors
Charles Cashman Trexler, Alexander E. Morelan, Rufus D. Catchings, Mark Goldman, Jack Willard
Apophis specific action team report Apophis specific action team report
This report about Asteroid (99942) Apophis's Earth close approach on April 13, 2029 was generated by a Specific Action Team (SAT) formed by the Small Body Assessment Group (SBAG) at the request of NASAs Planetary Science Division (PSD). The SAT assessed the current predictions for the effects that may occur due to the close encounter, evaluated observing capabilities, and identified...
Authors
J. L. Dotson, M. Brozovic, S. Chesley, S. Jarmak, N. Moskovitz, A. Rivkin, P. Sanchez, D. Souami, Timothy N. Titus
The 2020 Westmorland, California earthquake swarm as aftershocks of a slow slip event sustained by fluid flow The 2020 Westmorland, California earthquake swarm as aftershocks of a slow slip event sustained by fluid flow
Swarms are bursts of earthquakes without an obvious mainshock. Some have been observed to be associated with transient aseismic fault slip, while others are thought to be related to fluids. However, the association is rarely quantitative due to insufficient data quality. We use high-quality GPS/GNSS, InSAR, and relocated seismicity to study a swarm of >2,000 earthquakes which occurred...
Authors
K. Sirorattanakul, Z.E. Ross, M. Khoshmanesh, Elizabeth S. Cochran, M. Acosta, J.-P. Avouac
Climatic influence on the expression of strike-slip faulting Climatic influence on the expression of strike-slip faulting
Earthquakes on strike-slip faults are preserved in the geomorphic record by offset landforms that span a range of displacements, from small offsets created in the most recent earthquake (MRE) to large offsets that record cumulative slip from multiple prior events. An exponential decay in the number of large cumulative offsets has been observed on many faults, and a leading hypothesis is...
Authors
Nadine G. Reitman, Yann Klinger, Richard W. Briggs, Ryan D. Gold
Rock alteration mapping in and around fossil shallow intrusions at Mt. Ruapehu New Zealand with laboratory and aerial hyperspectral imaging Rock alteration mapping in and around fossil shallow intrusions at Mt. Ruapehu New Zealand with laboratory and aerial hyperspectral imaging
Diagnostic absorption features in hyperspectral data can be used to identify a specific mineral or mineral associations. However, it is unknown how accurate hyperspectral mapping can be for identifying alteration mineral compositions at the resolution required to describe structures such as fossil intrusions, or whether it can accurately quantify the alteration present. This study...
Authors
Abbey Douglas, Gabor Kereszturi, Lauren N. Schaefer, Ben M. Kennedy
Preface to the focus section on deformation models for the U.S. National Seismic Hazard Model Preface to the focus section on deformation models for the U.S. National Seismic Hazard Model
No abstract available.
Authors
Frederick Pollitz, Alexandra Elise Hatem, Kaj M. Johnson
The generational gap: Children, adults, and protective actions in response to earthquakes The generational gap: Children, adults, and protective actions in response to earthquakes
In addition to academic curricula, schools offer regular drills to train young people and adult staff on what to do in an emergency or disaster. Earthquake drills in the United States currently recommend the protective action “drop, cover, and hold on” in the event of shaking. Yet, little is known about whether this guidance is followed in schools and homes by children and adults. To...
Authors
Rachel M. Adams, Jennifer Tobin, Lori Peek, Jolie Breeden, Sara K. McBride, Robert Michael deGroot
Modeling geomagnetic induction in submarine cables Modeling geomagnetic induction in submarine cables
Submarine cables have become a vital component of modern infrastructure, but past submarine cable natural hazard studies have mostly focused on potential cable damage from landslides and tsunamis. A handful of studies examine the possibility of space weather effects in submarine cables. The main purpose of this study is to develop a computational model, using Python, of geomagnetic...
Authors
Shibaji Chakraborty, David H. Boteler, Xueling Shi, Benjamin Scott Murphy, Michael D. Hartinger, Xuan Wang, Greg M. Lucas, Joseph B. H. Baker
Multi-hazard risk analysis for the U.S. Department of the Interior: An integration of expert elicitation, planning priorities, and geospatial analysis Multi-hazard risk analysis for the U.S. Department of the Interior: An integration of expert elicitation, planning priorities, and geospatial analysis
An integral part of disaster risk management is identifying and prioritizing hazards and their potential impacts in a meaningful way to support risk-reduction planning. There has been considerable use and subsequent criticism of threat prioritization efforts that simply compare likelihoods and consequences of plausible threats. This article summarizes a new mixed-methods and scalable...
Authors
Nathan J. Wood, Alice Pennaz, Jason Marineau, Jeanne M. Jones, Jamie Jones, Peter Ng, Kevin Henry
A global catalog of calibrated earthquake locations A global catalog of calibrated earthquake locations
We produced a globally distributed catalog of earthquakes and nuclear explosions with calibrated hypocenters, referred to as the Global Catalog of Calibrated Earthquake Locations (GCCEL). This dataset currently contains 18,782 events in 289 clusters with >3.2 million arrival times observed at 19,258 stations. The term “calibrated” refers to the property that the hypocenters are minimally...
Authors
Eric A. Bergman, Harley M. Benz, William L. Yeck, Ezgi Karasözen, E. Robert Engdahl, Abdolreza Ghods, Gavin P. Hayes, Paul S. Earle
Planetary caves: A Solar System view of processes and products Planetary caves: A Solar System view of processes and products
We provide the first solar system wide compendium of speleogenic processes and products. An examination of 15 solar system bodies revealed that six cave-forming processes occur beyond Earth including volcanic (cryo and magmatic), fracturing (tectonic and impact melt), dissolution, sublimation, suffusion, and landslides. Although no caves (i.e., confirmed entrances with associated linear...
Authors
J. Judson Wynne, John E. Mylroie, Timothy N. Titus, Michael J. Malaska, Debra L. Buczkowski, Peter B. Buhler, Paul K. Byrne, Glen E. Cushing, Ashley Gerard Davies, Amos Frumkin, Candice Hansen-Koharcheck, Victoria Hiatt, Jason D. Hofgartner, Trudi Hoogenboom, Ulyana Horodyskyj, Kynan H. G. Hughson, Laura A. Kerber, Margaret E. Landis, Erin J. Leonard, Elodie Lesage, Alice Lucchetti, Matteo Massironi, Karl L. Mitchell, Luca Penasa, Cynthia B. Phillips, Riccardo Pozzobon, Jani Radebaugh, Francesco Sauro, Robert V. Wagner, Thomas R. Watters
Probing the upper end of intracontinental earthquake magnitude: A prehistoric example from the Dzhungarian and Lepsy faults of Kazakhstan Probing the upper end of intracontinental earthquake magnitude: A prehistoric example from the Dzhungarian and Lepsy faults of Kazakhstan
The study of surface ruptures is key to understanding the earthquake occurrence of faults especially in the absence of historical events. We present a detailed analysis of geomorphic displacements along the Dzhungarian Fault, which straddles the border of China and Kazakhstan. We use digital elevation models derived from structure-from-motion analysis of Pléiades satellite imagery and...
Authors
Chia-Hsin Tsai, Kanatbek Abdrakhmatov, Aidyn Mukambayev, Austin John Elliott, John R. Elliott, Christoph Grutzner, Edward J. Rhodes, A. H. Ivester, R. T. Walker, Roberta Wilkinson