Publications
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Planetary geologic mapping protocol—2022 Planetary geologic mapping protocol—2022
The Planetary Geologic Mapping Protocol covers the idealized process of compiling a NASA-funded map product of a non-terrestrial solid surface planetary body for U.S. Geological Survey (USGS) publication and summarizes technical specifications of the Mapping Process for authors and reviewers. Directed by community and programmatic recommendations, the USGS Planetary Geologic Map...
Authors
James A. Skinner, Alexandra E. Huff, Sarah R. Black, Holly C. Buban, Corey M. Fortezzo, Tenielle A. Gaither, Trent M. Hare, Marc A. Hunter
Morphology and paleohydrology of intracrater alluvial fans north of Hellas Basin, Mars Morphology and paleohydrology of intracrater alluvial fans north of Hellas Basin, Mars
Alluvial fans and sinuous ridges are both important records of the history of fluvial activity on Mars, and they often occur together. We present observations of alluvial fans, many of which exhibit inverted relief, in five craters in the region north of Hellas basin. The observed fans ranged in size from ~10 to 820 km2. We identified three primary fan surface morphology classes (chute...
Authors
Ryan B. Anderson, Rebecca Williams, Amber L. Gullikson, William Nelson
Enumerating plausible multifault ruptures in complex fault systems with physical constraints Enumerating plausible multifault ruptures in complex fault systems with physical constraints
We propose a new model for determining the set of plausible multifault ruptures in an interconnected fault system. We improve upon the rules used in the Third Uniform California Earthquake Rupture Forecast (UCERF3) to increase connectivity and the physical consistency of ruptures. We replace UCERF3’s simple azimuth change rules with new Coulomb favorability metrics and increase the...
Authors
Kevin R. Milner, Bruce E. Shaw, Edward H. Field
Mapping a magnetic superstorm: March 1989 geoelectric hazards and impacts on United States power systems Mapping a magnetic superstorm: March 1989 geoelectric hazards and impacts on United States power systems
A study is made of the relationships between geomagnetic and geoelectric field variation, Earth-surface impedance, and operational interference (anomalies) experienced on electric-power systems across the contiguous United States during the March 13-14, 1989 magnetic storm. For this, a 1-minute-resolution sequence of geomagnetic field maps is constructed from magnetometer time series...
Authors
Jeffrey J. Love, Greg M. Lucas, E. Joshua Rigler, Benjamin Scott Murphy, Anna Kelbert, Paul A. Bedrosian
Surface elevation change dynamics in coastal marshes along the northwestern Gulf of Mexico: Anticipating effects of rising sea-level and intensifying hurricanes Surface elevation change dynamics in coastal marshes along the northwestern Gulf of Mexico: Anticipating effects of rising sea-level and intensifying hurricanes
Accelerated sea-level rise and intensifying hurricanes highlight the need to better understand surface elevation change in coastal wetlands. We used the surface elevation table-marker horizon approach to measure surface elevation change in 14 coastal marshes along the northwestern Gulf of Mexico, within five National Wildlife Refuges in Texas (USA). During the 2014–2019 study period, the...
Authors
Jena A. Moon, Laura Feher, Tiffany C. Lane, William Vervaeke, Michael Osland, Douglas M. Head, Bogdan Chivoiu, David R. Stewart, Darren Johnson, James Grace, Kristine L. Metzger, Nicole M. Rankin
Luminescence sediment tracing reveals the complex dynamics of colluvial wedge formation Luminescence sediment tracing reveals the complex dynamics of colluvial wedge formation
Paleoearthquake studies that inform seismic hazard rely on assumptions of sediment transport that remain largely untested. Here, we test a widespread conceptual model and a new numerical model on the formation of colluvial wedges, a key deposit used to constrain the timing of paleoearthquakes. We perform this test by applying luminescence, a sunlight-sensitive sediment tracer, at a field...
Authors
Harrison J. Gray, Christopher B. DuRoss, Sylvia Nicovich, Ryan D. Gold
P- and S-wave velocity estimation by ensemble Kalman inversion of dispersion data for strong motion stations in California P- and S-wave velocity estimation by ensemble Kalman inversion of dispersion data for strong motion stations in California
This study uses an ensemble Kalman method for near-surface seismic site characterization of 154 network earthquake monitoring stations in California to improve the resolution of S-wave velocity (VS) and P-wave velocity (VP) profiles—up to the resolution depth—coupled with better quantification of uncertainties compared to previous site characterization studies at this network. These...
Authors
Elif Ecem Bas, Elnaz Seylabi, Alan K. Yong, Hesam Tehrani, Domniki Asimaki
Comparison of Digital Terrain Models from two photoclinometry methods Comparison of Digital Terrain Models from two photoclinometry methods
We evaluate the horizontal resolution and vertical precision for digital topographic models (DTMs) of the Moon derived from image radiance information, a process known as photoclinometry (PC) or shape-from-shading (SfS). We use the implementations in two available planetary image processing software systems, single image PC in the U.S. Geological Survey Integrated Software for Imagers...
Authors
Randolph L. Kirk, David Mayer, Colin M. Dundas, Benjamin H Wheeler, Ross A. Beyer, Oleg Alexandrov
Fundamental science and engineering questions in planetary cave exploration Fundamental science and engineering questions in planetary cave exploration
Nearly half a century ago, two papers postulated the likelihood of lunar lava tube caves using mathematical models. Today, armed with an array of orbiting and fly-by satellites and survey instrumentation, we have now acquired cave data across our solar system—including the identification of potential cave entrances on the Moon, Mars, and at least six other planetary bodies. These...
Authors
J. Judson Wynne, Timothy N. Titus, Ali-akbar Agha-Mohammadi, Armando Azua-Bustos, Penelope J. Boston, Pablo de Leon, Cansu Demirel-Floyd, Jo de Waele, Heather Jones, Michael J. Malaska, Ana Z. Miller, Haley M. Sapers, Francesco Sauro, Derek L. Sonderegger, Kyle Uckert, Uland Y. Wong, E. Calvin Alexander, Leroy Chiao, Glen E. Cushing, John DeDecker, Alberto G. Fairen, Amos Frumkin, Gary L. Harris, Michelle L. Kearney, Laura A. Kerber, Richard J. Leveille, Kavya Manyapu, Matteo Massironi, John E. Mylroie, Bogdan P. Onac, Scott E. Parazynski, Charity M. Phillips-Lander, Thomas H. Prettyman, Dirk Schulze-Makuch, Robert V. Wagner, William L. Whittaker, Kaj E. Williams
Constructing a large-scale landslide database across heterogeneous environments using task-specific model updates Constructing a large-scale landslide database across heterogeneous environments using task-specific model updates
Preparation and mitigation efforts for widespread landslide hazards can be aided by a large-scale, well-labeled landslide inventory with high location accuracy. Recent smallscale studies for pixel-wise labeling of potential landslide areas in remotely-sensed images using deep learning (DL) showed potential but were based on data from very small, homogeneous regions with unproven model
Authors
Savinay Nagendra, Daniel Kifer, Benjamin B. Mirus, Te Pei, Kathryn Lawson, Srikanth Banagere Manjunatha, Weixin Li, Hien Nguyen, Tong Qiu, Sarah Tran, Chaopeng Shen
#TheSmoreYouKnow and #emergencycute: A conceptual model on the use of humor by science agencies during crisis to create connection, empathy, and compassion #TheSmoreYouKnow and #emergencycute: A conceptual model on the use of humor by science agencies during crisis to create connection, empathy, and compassion
Studies from a variety of disciplines reveal that humor can be a useful method to reduce stress and increase compassion, connection, and empathy between agencies and people they serve during times of crisis. Despite this growing evidence base, humor's use during a geohazard (earthquake, volcanoes, landslides, and tsunami) to aid scientific agencies' crisis communication response has been...
Authors
Sara K. McBride, Jessica L. Ball
New model of the Barry Arm landslide in Alaska reveals potential tsunami wave heights of 2 meters, values much lower than previously estimated New model of the Barry Arm landslide in Alaska reveals potential tsunami wave heights of 2 meters, values much lower than previously estimated
The retreat of Barry Glacier has contributed to the destabilization of slopes in Barry Arm, creating the possibility that a landslide could rapidly enter the fjord and trigger a tsunami. The U.S. Geological Survey (USGS) recently released a report documenting potential tsunami wave heights in the event of a large, fast-moving landslide at the Barry Arm fiord near Prince William Sound...
Authors
Marisa A. Macias, Katherine R. Barnhart, Dennis M. Staley