Publications
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CRESCENT earthquake dynamic rupture, earthquake cycle, and tsunami code verification platform CRESCENT earthquake dynamic rupture, earthquake cycle, and tsunami code verification platform
Physics-based simulations are critical for understanding natural hazards. The increasing complexity of numerical codes requires benchmark exercises to verify that different computational methods yield consistent results when solving the same governing equations. Here, we present an open-access web platform designed for the verification of earthquake dynamic rupture, seismic cycle, and...
Authors
Loic Bachelot, Fabian Kutschera, Michael Barall, Brittany Erickson, Eric Dunham, Alice-Agnes Gabriel, Ruth A. Harris, Shuo Ma, Amanda M. Thomas, Wenqiang Zhang
Corundum discovered by SuperCam and the Perseverance rover at Jezero crater, Mars Corundum discovered by SuperCam and the Perseverance rover at Jezero crater, Mars
Mars is primarily composed of mafic mineral assemblages and their alteration products, but small, scattered rocks strewn across the landscape offer clues to greater petrological diversity. While traversing the Jezero crater rim, the Perseverance rover encountered several plagioclase-rich light-toned float rocks. SuperCam identified the distinctive signature of corundum (α-Al2O3) in these...
Authors
A.M. Ollila, O. Beyssac, A. Fau, O. Forni, E. Clave, P.S.A. Beck, C. C. Bedford, V. Payre, E. Dehouck, S.A. Connell, J.A. Manrique, P. Pilleri, O. Gasnault, G.M. Martinez, A. Udry, S. Bernard, P. Gasda, T. Acosta-Maeda, R.B. Anderson, Travis S.J. Gabriel, F. Calef, J.F. Bell, J. N. Maki, S. Schroder, C. Quantin-Nataf, J.R. Johnson, B. Chide, K. Rammelkamp, F. Poulet, C. Royer, M. Rock, N.L. Lanza, S.K. Sharma, G. Lopez-Ryeys, T. Fouchet, J. Comellas, A. Zastrow, E. Coutis, R.C. Wiens, A. Cousin, S. Maurice, S. M. Clegg, P. Bernardi, T. Nelson
Simulation-based scenario ShakeMaps for large magnitude (MW6.5+) crustal earthquakes on the Seattle, Tacoma, and southern Whidbey Island faults, Washington, USA Simulation-based scenario ShakeMaps for large magnitude (MW6.5+) crustal earthquakes on the Seattle, Tacoma, and southern Whidbey Island faults, Washington, USA
Scenario ground‐motion maps based on empirical ground‐motion models (GMMs) provide a rapid and generally reliable means of estimating the amplitude and distribution of earthquake shaking. However, because GMMs are designed for broad applicability, they often rely on simplified representations of Earth structure, which can limit their accuracy in regions with complex source, path, and...
Authors
Ian P. Stone, Erin A. Wirth, Alex R. Grant, Julia Grossman, Arthur D. Frankel
Testing characteristic magnitude distributions in modern PSHA models Testing characteristic magnitude distributions in modern PSHA models
The characteristic magnitude distribution hypothesis predicts a higher rate of large earthquakes than a Gutenberg–Richter extrapolation of the small‐earthquake rate would imply. Characteristic magnitude distributions have been commonly applied to faults in probabilistic seismic hazard analysis (PSHA), and in modern models they can emerge from the way short‐term seismicity constraints are...
Authors
Morgan T. Page, Kevin Ross Milner, Edward H. Field
Velocity-independent dry friction on mica: A realization of ideal Amontons-Coulomb friction Velocity-independent dry friction on mica: A realization of ideal Amontons-Coulomb friction
The Amontons-Coulomb friction law assumes that the frictional force between materials is independent of sliding velocity. However, as Coulomb noted, this is a rough approximation, and a second-order dependence of friction on the logarithm of sliding velocity is incorporated in a commonly used ‘rate- and state-dependent’ friction representation. Here we conduct shear experiments on mica...
Authors
Hiroshi Sakuma, Diane E. Moore, David A. Lockner, Toshihiro Kogure
Amazonian mass balance history of Martian ice reservoirs: Current knowledge and uncertainties Amazonian mass balance history of Martian ice reservoirs: Current knowledge and uncertainties
A major part of the history of the Amazonian period on Mars is the movement of water ice between near-surface reservoirs across the planet. This work assesses the ages and volumes of different parts of the Martian water ice inventory over the last ∼1 Gyr, to reconstruct the time history of ice reservoirs to the extent that it is currently known and determine whether they provide a mass...
Authors
Colin M. Dundas
2026–2031 U.S. Geological Survey strategy for a hazard ready Nation—Actionable science for risk reduction 2026–2031 U.S. Geological Survey strategy for a hazard ready Nation—Actionable science for risk reduction
Authors
Alice B. Pennaz, Jack R. Friedman, Nathan J. Wood, Jacqueline R. Meszaros
Site-specific amplifications in Northwestern Turkiye: A generic approach Site-specific amplifications in Northwestern Turkiye: A generic approach
In this study, we derive generic site amplification functions applicable to Northwestern Türkiye and follow guidance on site classifications established by the United States National Earthquake Hazards Reduction Program (NEHRP). We employ the one-dimensional (1-D) equivalent linear ground response analysis method and focus on recordings from a select suite of free-field strong motion (SM...
Authors
Gamze Muratoglu, Aysegul Askan, Alan Yong
Lunar-VISE landing site selection and characterization at Mons Gruithuisen Gamma Lunar-VISE landing site selection and characterization at Mons Gruithuisen Gamma
The Lunar Vulkan Imaging and Spectroscopy Explorer (Lunar-VISE) was selected for a Commercial Lunar Payload Services (CLPS) delivery to the Gruithuisen domes region of the Moon as part of NASA’s Payloads and Research Investigation on the Surface of the Moon (PRISM) program. The Gruithuisen domes are chemically and morphologically distinct from their surroundings with a thorium-rich...
Authors
Jean-Pierre Williams, Margaret E. Landis, Kristen A. Bennett, Sarah Valencia, Kerri L. Donaldson Hanna, Adrienne Dove, Patrick O'Brien, Erwan Mazarico, Javier Benavente, Brett W. Denevi, Justin Hagerty, Craig Hardgrove, Paul O. Hayne, Lena Heffernan, Adam LaMee, Thomas H. Prettyman, Katherine A. Shirley, Matthew A. Siegler, Jessica M. Sunshine, John S. Karcz, Maria E. Banks
The digital archivist: Automating legacy macroseismic data processing using large language models The digital archivist: Automating legacy macroseismic data processing using large language models
Macroseismic data are a key resource to investigate shaking and damage from preinstrumental and early instrumental eras. However, data are often stored as inconsistently formatted reports describing observed shaking and damage, making manually parsing and interpreting accounts labor‐intensive. We introduce a novel workflow using Google’s Gemini 2.5 Pro large language model (LLM) to...
Authors
Aarnav Agrawal, Susan E. Hough, Mostafa Mousavi, Margaret Hellweg, William Ellsworth, Clara Yoon, Salvador Blanco
Mars as one system: Insights from the 8th international conference on Mars polar science and exploration Mars as one system: Insights from the 8th international conference on Mars polar science and exploration
The 8th International Conference on Mars Polar Science and Exploration (ICMPSE) provided new insights into the complex interplay between Martian ice, climate, and atmospheric dynamics. The conference emphasized a holistic view of Mars as a system, where surface processes, subsurface ice, atmospheric dynamics, and historical climate shifts are interconnected. Research updates spanned...
Authors
Isaac B. Smith, Chimira Andres, Shannon Hibbard, Stefano Nerozzi, Roberto Aguilar, Peter Buhler, Ben Cornford, Leslie Tamppari, Timothy N. Titus
Cascadia Subduction Zone science: Call for the next generation community seismic velocity model Cascadia Subduction Zone science: Call for the next generation community seismic velocity model
The Cascadia subduction zone (CSZ) hosts major seismic and tsunami hazards, yet key questions persist about the relationship between margin structure, fluid distribution, episodic tremor and slip, shallow megathrust behavior, shaking and tsunamigenesis, and the resulting hazard estimates. Addressing these problems requires an empirically grounded, three‐dimensional seismic velocity model...
Authors
Valerie J. Sahakian, Asif Ashraf, Charity Mann, Pieter-Ewald Share-MacParland, Rasheed Ajala, Jonathan Delph, Bin He, Emilie Hooft, Alex R. Grant, William J. Stephenson, Erin A. Wirth, Amanda Thomas, Diego Melgar, Jill Elizabeth