Publications
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Quantitative risk of earthquake disruption to global copper and rhenium supply Quantitative risk of earthquake disruption to global copper and rhenium supply
Earthquakes have the potential to substantially affect mining operations, potentially leading to supply chain disruptions and adversely affecting the global economy. This study explores the quantification of earthquake risk to copper and rhenium commodity supply by examining the spatial concentration of high earthquake hazard areas and the commodity-specific mining, smelting, and...
Authors
Kishor S. Jaiswal, Nico Luco, Emily K. Schnebele, Nedal T. Nassar, Donya Otarod
Aftershock forecasting Aftershock forecasting
Aftershocks can compound the impacts of a major earthquake, disrupting recovery efforts and potentially further damaging weakened buildings and infrastructure. Forecasts of the probability of aftershocks can therefore aid decision-making during earthquake response and recovery. Several countries issue authoritative aftershock forecasts. Most aftershock forecasts are based on simple...
Authors
Jeanne L. Hardebeck, Andrea L. Llenos, Andrew J. Michael, Morgan T. Page, Max Schneider, Nicholas van der Elst
Collision structures of the Prince William terrane and Chugach terrane docking along the Shumagin and Unimak convergent margins, Alaska, USA Collision structures of the Prince William terrane and Chugach terrane docking along the Shumagin and Unimak convergent margins, Alaska, USA
Western Alaska’s convergent margins are composed of tectonostratigraphic terranes. On land, terrane assembly is recognized along boundaries or sutures between neighboring geologic elements with distinctly different origins. In marine areas where rock outcrops are covered by sediment, recognizing terrane sutures is problematic. A fault in seismic dip line 5 of the ALEUT project has been...
Authors
Roland E. von Huene, John J. Miller
Global variability of the composition and temperature at the 410-km discontinuity from receiver function analysis of dense arrays Global variability of the composition and temperature at the 410-km discontinuity from receiver function analysis of dense arrays
Seismic boundaries caused by phase transitions between olivine polymorphs in Earth's mantle provide thermal and compositional markers that inform mantle dynamics. Seismic studies of the mantle transition zone often use either global averaging with sparse arrays or regional sampling from a single dense array. The intermediate approach of this study utilizes many densely spaced seismic...
Authors
Margaret Elizabeth Glasgow, Hankui K. Zhang, Brandon Schmandt, Wen-Yi Zhou, Jinchi Zhang
Debris avalanches in the northern California Coast Range triggered by plate boundary earthquakes Debris avalanches in the northern California Coast Range triggered by plate boundary earthquakes
Determining the timing and cause for ancient hillslope failures proves difficult in the western United States, yet critical as it ties directly into groundmotion estimates for hazardous events. This knowledge gap is important to confront as hillslope failures are candidates to be triggered by earthquakes along active plate boundaries. We identify two prehistoric, i.e., preinstrumental...
Authors
Jessie K. Pearl, Harvey Kelsey, Stephen J. Angster, Dylan Caldwell, Ian Pryor, Brian Sherrod
Wildfire, extreme precipitation and debris flows, oh my! Channel response to compounding disturbances in a mountain stream in the Upper Colorado Basin, USA Wildfire, extreme precipitation and debris flows, oh my! Channel response to compounding disturbances in a mountain stream in the Upper Colorado Basin, USA
Compounding changes in climate and human activities stand to increase sediment input to rivers in many landscapes, including via discrete perturbations such as post-fire debris flows. Because sediment supply is a dominant control on river morphology, understanding mountain river responses to sediment regime perturbations is critical to predicting and addressing downstream effects to...
Authors
Paxton Ridgeway, Belize Lane, Haley Canham, Brendan Murphy, Patrick Belmont, Francis K. Rengers
A comparison of CO2 seasonal activity in Mars' northern and southern hemispheres A comparison of CO2 seasonal activity in Mars' northern and southern hemispheres
Carbon dioxide is Mars' most active volatile. The seasonal and diurnal processes of when and where it condenses and sublimates are determined by energy balance between the atmosphere and surface ice in Mars' vapor pressure equilibrium climate. Mars' current obliquity ensures that the polar caps are stable locations for seasonal condensation. The eccentricity of Mars' orbit is the major...
Authors
Candice J. Hansen, Shane Byrne, Wendy M. Calvin, Serina Diniega, Colin M. Dundas, Paul O. Hayne, Alfred S. McEwen, Lauren E McKeown, Sylvain Piqueux, Ganna Portyankina, Meg E Schwamb, Timothy N. Titus, Jacob M Widmer
Geologic constraints on the formation and evolution of Saturn’s mid-sized moons Geologic constraints on the formation and evolution of Saturn’s mid-sized moons
Saturn’s mid-sized icy moons have complex relationships with Saturn’s interior, the rings, and with each other, which can be expressed in their shapes, interiors, and geology. Observations of their physical states can, thus, provide important constraints on the ages and formation mechanism(s) of the moons, which in turn informs our understanding of the formation and evolution of Saturn...
Authors
Alyssa Rhoden, Sierra Ferguson, William F. Bottke, Julie C. Castillo-Rogez, Emily Martin, Michael T. Bland, Michelle R. Kirchoff, Marco Zannoni, Nicolas Rambaux, Julien Salmon
The High-Resolution Imaging Science Experiment (HiRISE) in the MRO extended science phases (2009–2023) The High-Resolution Imaging Science Experiment (HiRISE) in the MRO extended science phases (2009–2023)
The Mars Reconnaissance Orbiter has been orbiting Mars since 2006 and has acquired >80,000 HiRISE images with sub-meter resolution, contributing to over 2000 peer-reviewed publications, and has provided the data needed to enable safe surface landings in key locations by several rovers or landers. This paper describes the changes to science planning, data processing, and analysis tools...
Authors
Alfred S. McEwen, Shane Byrne, Candice J. Hansen, Ingrid J. Daubar, Sarah Sutton, Colin M. Dundas, Nicole Bardabelias, Nicole Baugh, James W. Bergstrom, Ross A. Beyer, Kristin M Block, Veronica Bray, John C. Bridges, Matthew Chojnacki, Susan J. Conway, W Alan Delamere, T. Ebben, Yisrael Espinosa, Audrie Fennema, John Grant, Virginia C Gulick, Kenneth E. Herkenhoff, Rodney Heyd, Richard Leis, Lujendra Ojha, Singleton Papendick, Christian Schaller, Nicolas Thomas, Livio L. Tornabene, Catherine M. Weitz, Sharon A. Wilson
Polar science results from Mars Reconnaissance Orbiter: Multiwavelength, multiyear insights Polar science results from Mars Reconnaissance Orbiter: Multiwavelength, multiyear insights
Mars Reconnaissance Orbiter (MRO), with its arrival in 2006 and nearly continuous operation since, has provided data for the study of martian polar processes spanning nine Mars years. Mars' polar deposits have long been thought to preserve records of past climates, potentially readable like terrestrial ice cores. However, unraveling millions of years of history in the ice depends on...
Authors
Margaret E. Landis, P. J. Acharya, N. R. Alsaeed, C. Andres, Patricio Becerra, Wendy M. Calvin, E. M. Cangi, S. F. A. Cartwright, M. S. Chaffin, Serina Diniega, Colin M. Dundas, Candice J. Hansen, Paul O. Hayne, Kenneth E. Herkenhoff, David M. Kass, Aditya R. Khuller, Lauren McKeown, Patrich S. Russell, Isaac B. Smith, Sarah S. Sutton, J. M. Widmer, Jennifer L Whitten
New, dated small impacts on the South Polar Layered Deposits (SPLD), Mars, and implications for shallow subsurface properties New, dated small impacts on the South Polar Layered Deposits (SPLD), Mars, and implications for shallow subsurface properties
The Mars Reconnaissance Orbiter (MRO) Context Camera (CTX) imaged two newly formed impact craters on the South Polar Layered Deposits (SPLD) of Mars in 2018 and 2020. These two new craters, the first detected on the SPLD, measure ∼17 m and ∼48 m in diameter. Follow-up observations were conducted with the High Resolution Imaging Science Experiment (HiRISE), showing seasonal and...
Authors
Margaret E. Landis, Colin M. Dundas, Alfred S. McEwen, Ingrid J. Daubar, Paul O. Hayne, Shane Byrne, Sarah S. Sutton, Vidhya Ganesh Rangarajan, Livio L. Tornabene, Andrew Britton, Kenneth E. Herkenhoff
Novel quantitative methods to enable multispectral identification of high-purity water ice exposures on Mars using High Resolution Imaging Science Experiment (HiRISE) images Novel quantitative methods to enable multispectral identification of high-purity water ice exposures on Mars using High Resolution Imaging Science Experiment (HiRISE) images
Reliable detection and characterization of water ice on the Martian surface is pivotal to not only understand its present and past climate, but to also provide valuable information on in-situ resource availability and distribution for future human exploration missions. Ice-rich features are currently identified with visible/near-IR (VNIR), thermal IR and radar data. However, their coarse...
Authors
Vidhya Ganesh Rangarajan, Livio L. Tornabene, G. R. Osinski, Colin M. Dundas, Ross A. Beyer, Kenneth E. Herkenhoff, Shane Byrne, Rodney Heyd, Frank P. Seelos, G. Munaretto, Angela Dapremont