Publications
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Drivers, dynamics and impacts of changing Arctic coasts 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...
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 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...
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 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...
Authors
Elizabeth S. Cochran, Jessie Kate Saunders, Sarah E. Minson, Julian Bunn, Annemarie S. Baltay Sundstrom, Debi Kilb, Colin T O’Rourke, Mitsuyuki Hoshiba, Yuki Kodera
Long-term ocean observing for international capacity development around tsunami early warning 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...
Authors
Danielle F. Sumy, Sara K. 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) 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 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...
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 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...
Authors
Belle E. Philibosian, Nathalie Feuillet, Jennifer Weil-Accardo, Eric Jacques, Abel Guihou, Anne-Sophie Meriaux, Andre Anglade, Jean-Marie Saurel, Sebastien Deroussi
Open-source resources help navigate new IM regulations 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...
Authors
N. Simon Kwong, Kishor S. Jaiswal, J. W. Baker, Nico Luco, K. A. Ludwig, Vasey J. Stephens
Estimates of metals contained in abyssal manganese nodules and ferromanganese crusts in the global ocean based on regional variations and genetic types of nodules Estimates of metals contained in abyssal manganese nodules and ferromanganese crusts in the global ocean based on regional variations and genetic types of nodules
Deep-ocean ferromanganese crusts and manganese nodules are important marine repositories for global metals. Interest in these minerals as potential resources has led to detailed sampling in many regions of the global ocean, allowing for updated estimates of their global extent. Here, we present global estimates of total tonnage as well as contained metal concentrations and tonnages for
Authors
Kira Mizell, James R. Hein, Manda Viola Au, Amy Gartman
Seismic site characterization with shear wave (SH) reflection and refraction methods Seismic site characterization with shear wave (SH) reflection and refraction methods
Reflection and critically refracted seismic methods use traveltime measurements of body waves propagating between a source and a series of receivers on the ground surface to calculate subsurface velocities. Body wave energy is refracted or reflected at boundaries where there is a change in seismic impedance, defined as the product of material density and seismic velocity. This article...
Authors
James A. Hunter, Heather L. Crow, William J. Stephenson, Andre J.-M. Pugin, Robert Williams, James B. Harris, Jackson K. Odum, Edward W Woolery
An assessment of uncertainties in VS profiles obtained from microtremor observations in the phased 2018 COSMOS blind trials An assessment of uncertainties in VS profiles obtained from microtremor observations in the phased 2018 COSMOS blind trials
Site response is a critical consideration when assessing earthquake hazards. Site characterization is key to understanding site effects as influenced by seismic site conditions of the local geology. Thus, a number of geophysical site characterization methods were developed to meet the demand for accurate and cost-effective results. As a consequence, a number of studies have been...
Authors
Michael W. Asten, Alan Yong, Sebastiano Foti, Koichi Hayashi, Antony J. Martin, William J. Stephenson, John F. Cassidy, Jacie Coleman, Robert L. Nigbor, Silvia Castellaro, Kosuke Chimoto, Ikuo Cho, Cecile Cornou, Takumi Hayashida, Manuel Hobiger, Chun-Hsiang Kuo, Albert Macau, E. Diego Mercerat, Sheri Molnar, Passakorn Pananont, Marco Pilz, Nakhorn Poovarodom, Esteban Saez, Marc Wathelet, Hiroaki Yamanaka, Toshiaki Yokoi, Don Zhao
Zoning Verification in Mexico City Using Strong Motions of the M7.1 Puebla-Morelos Earthquake of September 19, 2017 Zoning Verification in Mexico City Using Strong Motions of the M7.1 Puebla-Morelos Earthquake of September 19, 2017
Mexico City suffers extensive damage from large earthquakes that originate at far distances due mainly to densely built areas on a filled lakebed. Seismic design codes in Mexico recognize the site-specific issues in Mexico City by acknowledging zones that represent lakebed as being riskier compared to other Mexico City areas. At the time of the 19 September 1985 M8.1 Michoacán Earthquake...
Authors
Mehmet Celebi, Valerie J. Sahakian, Diego Melgar, Luis Quintanar