Publications
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Post-landing major element quantification using SuperCam laser induced breakdown spectroscopy
The SuperCam instrument on the Perseverance Mars 2020 rover uses a pulsed 1064 nm laser to ablate targets at a distance and conduct laser induced breakdown spectroscopy (LIBS) by analyzing the light from the resulting plasma. SuperCam LIBS spectra are preprocessed to remove ambient light, noise, and the continuum signal present in LIBS observations. Prior to quantification, spectra are masked to r
Authors
Ryan Anderson, Olivier Forni, Agnes Cousin, Roger C. Wiens, Samuel M. Clegg, Jens Frydenvang, Travis S. J. Gabriel, Ann M. Ollila, Susanne Schröder, Olivier Beyssac, Erin Gibbons, David Vogt, Elise Clave, Jose-Antonio Manrique, Carey Legett, Paolo Pilleri, Raymond Newell, Joseph Sarrao, Sylvestre Maurice, Gorka Arana, Karim Benzerara, Pernelle Bernardi, Sylvain Bernard, Bruno Bousquet, Adrian J. Brown, Cesar Alvarez-Llamas, Baptiste Chide, Edward A. Cloutis, Jade Comellas, Stephanie Connell, Erwin Dehouck, Dorothea Delapp, Ari Essunfeld, Cecile Fabre, Thierry Fouchet, Cristina Garcia, Laura Garcia-Gomez, Patrick J. Gasda, Olivier Gasnault, Elisabeth Hausrath, Nina L. Lanza, Javier Laserna, Jeremie Lasue, Guillermo Lopez, Juan Manuel Madariaga, Lucia Mandon, Nicolas Mangold, Pierre-Yves Meslin, Marion Nachon, Anthony Nelson, Horton E. Newsom, Adriana Reyes-Newell, Scott Robinson, Fernando Rull, Shiv Sharma, Justin I Simon, Pablo Sobron, Imanol Torre Fernandez, Arya Udry, Dawn Venhaus, Scott McLennan, Richard V. Morris, Bethany L. Ehlmann
hical—The HiRISE radiometric calibration software developed within the ISIS3 planetary image processing suite
IntroductionThis report summarizes the software and algorithms that are used to calibrate images returned by the High Resolution Imaging Science Experiment (HiRISE) camera onboard the Mars Reconnaissance Orbiter (MRO) spacecraft. The instrument design and data processing methods are summarized below, followed by a description of relevant calibration data and details of the calibration procedure. I
Authors
Kris J. Becker, Moses P. Milazzo, W. Alan Delamere, Kenneth E. Herkenhoff, Eric M. Eliason, Patrick S. Russell, Laszlo P. Keszthelyi, Alfred S. McEwen
Seismic background noise levels across the continental United States from USArray Transportable Array: The influence of geology and geography
Since 2004, the most complete estimate of background noise levels across the continental U.S. was attained using 61 broadband seismic stations to calculate power spectral density (PSD) probability density functions. To improve seismic noise estimates across the U.S., we examine vertical component seismic data from the EarthScope USArray Transportable Array seismic network that rolled across the U.
Authors
Robert E. Anthony, Adam T. Ringler, David C. Wilson
The occurrence and hazards of great subduction zone earthquakes
Subduction zone earthquakes result in some of the most devastating natural hazards on Earth. Knowledge of where great (moment magnitude M ≥ 8) subduction zone earthquakes can occur and how they rupture is critical to constraining future seismic and tsunami hazards. Since the occurrence of well-instrumented great earthquakes, such as the 2004 M9.1 Sumatra–Andaman and 2011 M9.1 Tohoku earthquakes, t
Authors
Erin Wirth, Valerie J. Sahakian, Laura M Wallace, Daniel Melnick
Drivers, dynamics and impacts of changing Arctic coasts
Arctic coasts are vulnerable to the effects of climate change, including rising sea levels and the loss of permafrost, sea ice and glaciers. Assessing the influence of anthropogenic warming on Arctic coastal dynamics, however, is challenged by the limited availability of observational, oceanographic and environmental data. Yet, with the majority of permafrost coasts being erosive, coupled with pro
Authors
Anna M. Irrgang, Mette Bendixen, Louise M. Farquharson, Alisa V. Baranskaya, Li H. Erikson, Ann E. Gibbs, Stanislav A. Ogorodov, Pier Paul Overduin, Hugues Lantuit, Mikhail N. Grigoriev, Benjamin M. Jones
Portable optically stimulated luminescence age map of a paleoseismic exposure
The quality and quantity of geochronologic data used to constrain the history of major earthquakes in a region exerts a first-order control on the accuracy of seismic hazard assessments that affect millions of people. However, evaluations of geochronological data are limited by uncertainties related to inherently complex depositional processes that may vary spatially and temporally. To improve con
Authors
Christopher DuRoss, Ryan D. Gold, Harrison J. Gray, Sylvia R. Nicovich
Alert optimization of the PLUM earthquake early warning algorithm for the western United States
We determine an optimal alerting configuration for the propagation of local undamped motion (PLUM) earthquake early warning (EEW) algorithm for use by the U.S. ShakeAlert system covering California, Oregon, and Washington. All EEW systems should balance the primary goal of providing timely alerts for impactful or potentially damaging shaking while limiting alerts for shaking that is too low to be
Authors
Elizabeth S. Cochran, Jessie Kate Saunders, Sarah E. Minson, Julian Bunn, Annemarie S. Baltay, Debi Kilb, Colin T O'Rourke, Mitsuyuki Hoshiba, Yuki Kodera
Long-term ocean observing for international capacity development around tsunami early warning
The 2004 magnitude (M) 9.1 Sumatra-Andaman Islands earthquake in the Indian Ocean triggered the deadliest tsunami ever, killing more than 230,000 people. In response, the United Nations Educational, Scientific, and Cultural Organization (UNESCO) established three additional Intergovernmental Coordination Groups (ICGs) for the Tsunami and Other Coastal Hazards Early Warning System: for the Caribbea
Authors
Danielle F. Sumy, Sara McBride, Christa von Hillebrandt-Andrade, Monica D. Kohler, John Orcutt, Shuichi Kodaira, Kate Moran, Daniel McNamara, Takane Hori, Elizabeth Vanacore, Benoit Pirenne, John A. Collins
Dynamic Rupture TAG – The 2021 Ingredients Workshop – Stress Conditions (SCEC Project 21127)
No abstract available.
Authors
Ruth A. Harris, Michael Barall
Tectonostratigraphy and major structures of the Georgian Greater Caucasus: Implications for structural architecture, along-strike continuity, and orogen evolution
Although the Greater Caucasus Mountains have played a central role in absorbing late Cenozoic convergence between the Arabian and Eurasian plates, the orogenic architecture and the ways in which it accommodates modern shortening remain debated. Here, we addressed this problem using geologic mapping along two transects across the southern half of the western Greater Caucasus to reveal a suite of re
Authors
Charles Cashman Trexler, Eric Cowgill, Nathan A Niemi, Dylan A Vasey, Tea Godoladze
20th-century strain accumulation on the Lesser Antilles megathrust based on coral microatolls
The seismic potential of the Lesser Antilles megathrust remains poorly known, despite the potential hazard it poses to numerous island populations and its proximity to the Americas. As it has not produced any large earthquakes in the instrumental era, the megathrust is often assumed to be aseismic. However, historical records of great earthquakes in the 19th century and earlier, which were most li
Authors
Belle E. Philibosian, Nathalie Feuillet, Jennifer Weil-Accardo, Eric Jacques, Abel Guihou, Anne-Sophie Mériaux, André Anglade, Jean-Marie Saurel, Sébastien Deroussi
Open-source resources help navigate new IM regulations
The revision of federal safety regulations for integrity management of gas transmission pipelines to require explicit consideration of seismicity increases the importance for operators to be actively identifying high-consequence areas (HCAs), evaluating seismic-related threats, and choosing a risk model to support risk management decisions. To ensure equal access to information by both operators a
Authors
N. Simon Kwong, Kishor S. Jaiswal, J. W. Baker, Nicolas Luco, K. A. Ludwig, Vasey J. Stephens