Publications
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Probabilistic seismic hazard analysis at regional and national scale: State of the art and future challenges
Seismic hazard modelling is a multi-disciplinary science that aims to forecast earthquake occurrence and its resultant ground shaking. Such models consist of a probabilistic framework that quantifies uncertainty across a complex system; typically, this includes at least two model components developed from Earth science: seismic-source and ground-motion models. Although there is no scientific presc
Authors
M. C. Gerstenberger, W. Marzocchi, T. J. Allen, M. Pagani, Janice Adams, L. Danciu, Edward H. Field, H. Fujiwara, Nicolas Luco, K-F Ma, C. Meletti, Mark D. Petersen
Molecular indicators of methane metabolisms at cold seeps along the United States Atlantic margin
A lipid biomarker study was undertaken to determine the microbial composition and variability in authigenic carbonates and associated soft bottom habitats from the Norfolk and the Baltimore Canyon seep fields along the US mid-Atlantic margin. Results from this study capture a distinct molecular signal from methane oxidizing archaea, including archaeol (I), sn-2-hydroxyarchaeol, pentamethylicosane
Authors
Nancy G. Prouty, Pamela L. Campbell, Hilary Close, Jennifer F. Biddle, Sabrina Beckmann
Activation of optimally and unfavourably oriented faults in a uniform local stress field during the 2011 Prague, Oklahoma, sequence
The orientations of faults activated relative to the local principal stress directions can provide insights into the role of pore pressure changes in induced earthquake sequences. Here, we examine the 2011 M 5.7 Prague earthquake sequence that was induced by nearby wastewater disposal. We estimate the local principal compressive stress direction near the rupture as inferred from shear wave splitti
Authors
Elizabeth S. Cochran, Robert Skoumal, Devin McPhillips, Z. Ross, Katie M. Keranen
Mechanics of near-field deformation during co- and post-seismic shallow fault slip
Poor knowledge of how faults slip and distribute deformation in the shallow crust hinders efforts to mitigate hazards where faults increasingly intersect with the expanding global population at Earth’s surface. Here we analyze two study sites along the 2014 M 6.0 South Napa, California, earthquake rupture, each dominated by either co- or post-seismic shallow fault slip. We combine mobile laser sca
Authors
Johanna Nevitt, Benjamin A. Brooks, Rufus D. Catchings, Mark Goldman, Todd Ericksen, Craig L. Glennie
Earthquakes, ShakeCast
ShakeCast® – short for ShakeMap Broadcast – is a fully automated software system for delivering specific ShakeMap products to critical users and for triggering established post-earthquake response protocols. ShakeCast is a freely available, postearthquake situational awareness software application that automatically retrieves earthquake shaking data from ShakeMap to compare ground shaking intensit
Authors
Kuo-wan Lin, David J. Wald, Daniel Slosky
Map depicting susceptibility to landslides triggered by intense rainfall, Puerto Rico
Landslides in Puerto Rico range from nuisances to deadly events. Centuries of agricultural and urban modification of the landscape have perturbed many already unstable hillsides on the tropical island. One of the main triggers of mass wasting on the island is the high-intensity rainfall that is associated with tropical atmospheric systems. Puerto Rico’s geographic position and rugged topography re
Authors
K. Stephen Hughes, William Schulz
Dynamic rupture simulations of the M6.4 and M7.1 July 2019 Ridgecrest, California earthquakes
The largest earthquakes of the 2019 Ridgecrest, California, sequence were a M 6.4 left‐lateral rupture followed 34 hr later by a M 7.1 on a perpendicular right‐lateral fault. We use dynamic rupture modeling to address the questions of why the first earthquake did not propagate through the right‐lateral fault in one larger event, whether stress changes from the M 6.4 were necessary for the M 7.1 to
Authors
Julian C. Lozos, Ruth A. Harris
Response study of the tallest California building inferred from the Mw7.1 Ridgecrest, California earthquake of 5 July 2019 and ambient motions
The newly constructed tallest building in California, the 73-story Wilshire Grand in Los Angeles, California, is designed in conformance with performance-based design procedures. The building is designed with concrete core–shear walls, three outriggers with buckling restrained braces (BRBs) located along the height, and two three-story truss-belt structural systems. The building is equipped with a
Authors
Mehmet Çelebi, S. Farid Ghahari, Hamid Haddadi, Ertugrul Taciroglu
A lacustrine paleoenvironment recorded at Vera Rubin ridge, Gale crater: Overview of the sedimentology and stratigraphy observed by the Mars Science Laboratory Curiosity rover
For ~500 Martian solar days (sols), the Mars Science Laboratory team explored Vera Rubin ridge (VRR), a topographic feature on the northwest slope of Aeolis Mons. Here we review the sedimentary facies and stratigraphy observed during sols 1,800–2,300, covering more than 100 m of stratigraphic thickness. Curiosity's traverse includes two transects across the ridge, which enables investigation of la
Authors
Lauren A. Edgar, Christopher M. Fedo, Sanjeev Gupta, Steve G. Banham, Abigail A. Fraeman, John P. Grotzinger, Kathryn M. Stack, Nathan T. Stein, Kristen A. Bennett, Frances Rivera-Hernandez, Vivian Z. Sun, Kenneth S. Edgett, David M. Rubin, Christopher H House, Jason K. Van Beek
Coupling of Indo-Pacific climate variability over the last millennium
The Indian Ocean Dipole (IOD) impacts climate and rainfall across the world, and most
severely in nations surrounding the Indian Ocean1-4. The frequency and intensity of positive
IOD events increased during the 20th Century5 and may continue to intensify in a warming
world6; however, confidence in future IOD changes is limited by known biases in model
representations of the IOD7 and the lack of in
Authors
Nerilie J. Abram, Nicky M. Wright, Bethany Ellis, Bronwyn C. Dixon, Jennifer B. Wurtzel, Matthew H. England, Caroline C. Ummenhofer, Belle E. Philibosian, Sri Yudawati Cahyarini, Tsai-Luen Yu, Chuan-Chou Shen, Hai Cheng, R. Lawrence Edwards, David Heslop
An analysis of the factors that control fault zone architecture and the importance of fault orientation relative to regional stress
The moment magnitude 7.2 El Mayor−Cucapah (EMC) earthquake of 2010 in northern Baja California, Mexico produced a cascading rupture that propagated through a geometrically diverse network of intersecting faults. These faults have been exhumed from depths of 6−10 km since the late Miocene based on low-temperature thermochronology, synkinematic alteration, and deformational fabrics. Coseismic slip o
Authors
John Fletcher, Orlando Teran, Tom Rockwell, Michael E. Oskin, Kenneth W. Hudnut, Ronald Spelz, Pierre Lacan, Mathew Dorsey, Giles Ostermijer, Thomas M. Mitchell, Sinan Akciz, Ana Paula Hernandez-Flores, Alejandro Hinojosa-Corona, Ivan Peña-Villa, David K. Lynch
Evidence for late Quaternary deformation along Crowley's Ridge, New Madrid seismic zone
The New Madrid seismic zone has been the source of multiple major (M ~7.0–7.5) earthquakes in the past 2 ka, yet the surface expression of recent deformation remains ambiguous. Crowleys Ridge, a linear ridge trending north‐south for 300+ km through the Mississippi Embayment, has been interpreted as either a fault‐bounded uplift or a nontectonic erosional remnant. New and previously published seism
Authors
Jessica Thompson Jobe, Ryan D. Gold, Richard W. Briggs, Robert Williams, William J. Stephenson, Jaime E. Delano, Anjana K. Shah, Burke J. Minsley