Explanipedia

Neotectonic Mapping of Puerto Rico Open

Jessie Thompson Jobe, Richard W. Briggs, K. Stephen Hughes, James Joyce, Ryan D. Gold , et al. · 2024

Puerto Rico is part of the Puerto Rico-Virgin Islands microplate, along the Caribbean–North American plate boundary between the Puerto Rico trench subduction zone and the Muertos Trough incipient subduction zone. Despite recent seismicity …

U.S. Geological Survey Earthquake Hazards Program decadal science strategy, 2024–33 Open

G. P. Hayes, A. Baltay, William D. Barnhart, Michael L. Blanpied, Lindsay Davis , et al. · 2024

Rapid Surface Rupture Mapping from Satellite Data: The 2023 Kahramanmaraş, Turkey (Türkiye), Earthquake Sequence Open

Nadine G. Reitman, Richard W. Briggs, William D. Barnhart, Alexandra E. Hatem, Jessica Thompson Jobe , et al. · 2023

The 6 February 2023 Kahramanmaraş, Turkey (Türkiye), earthquake sequence produced > 500 km of surface rupture primarily on the left-lateral East Anatolian (~345 km) and Çardak (~175 km) faults. Constraining the length and magnitude of s…

Coseismic slip of the 2020 Mw 6.4 Petrinja earthquake (Croatia) from dense geodetic benchmarks, optical image correlation and InSAR data Open

Maxime Henriquet, Branko Kordić, Marianne Métois, James Hollingsworth, Cécile Lasserre , et al. · 2023

The Mw 6.4 Petrinja earthquake (2020, Croatia) is among the strongest continental earthquakes that occurred in Eastern Europe for decades. In such low-strain contexts, the sparse terrestrial-monitoring (few seismic and geodetic stations) o…

The Pondosa fault zone: A distributed dextral-normal-oblique fault system in northeastern California, USA Open

Jessica Thompson Jobe, Richard W. Briggs, Ryan D. Gold, Stephen B. DeLong, Madeline Hille , et al. · 2022

The tectonic domains of Basin and Range extension, Cascadia subduction zone contraction, and Walker Lane dextral transtension converge in the Mushroom Rock region of northeastern California, USA. We combined analysis of high-resolution top…

Author Correction: Localized fault-zone dilatancy and surface inelasticity of the 2019 Ridgecrest earthquakes Open

William D. Barnhart, Ryan D. Gold, James Hollingsworth · 2022

Off‐Fault Deformation in Regions of Complex Fault Geometries: The 2013, Mw7.7, Baluchistan Rupture (Pakistan) Open

Solène Antoine, Yann Klinger, Arthur Delorme, Ryan D. Gold · 2022

Observations of recent earthquake surface ruptures show that ground deformations include a localized component occurring on faults, and an off‐fault component affecting the surrounding medium. This second component is also referred to as o…

Simplifying complex fault data for systems-level analysis: Earthquake geology inputs for U.S. NSHM 2023 Open

Alexandra E. Hatem, Camille Collett, Richard W. Briggs, Ryan D. Gold, Stephen J. Angster , et al. · 2022

Seismic Reflection Imaging of the Low-Angle Panamint Normal Fault System, Eastern California Open

Ryan D. Gold, W.J. Stephenson, R.W. Briggs, Christiopher DuRoss, E. Kirby , et al. · 2022

Shallowly dipping (<30°) low-angle normal faults (LANFs) have been documented globally; however, examples of active LANFs in continental settings are limited. The western margin of the Panamint Range in eastern California is defined by a L…

Luminescence sediment tracing reveals the complex dynamics of colluvial wedge formation Open

Harrison J. Gray, Christopher B. DuRoss, Sylvia Nicovich, Ryan D. Gold · 2022

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 de…

A geomorphic-process-based cellular automata model of colluvial wedge morphology and stratigraphy Open

Harrison J. Gray, Christopher B. DuRoss, Sylvia Nicovich, Ryan D. Gold · 2022

The development of colluvial wedges at the base of fault scarps following normal-faulting earthquakes serves as a sedimentary record of paleoearthquakes and is thus crucial in assessing seismic hazard. Although there is a large body of obs…

Portable optically stimulated luminescence age map of a paleoseismic exposure Open

Christopher B. DuRoss, Ryan D. Gold, Harrison J. Gray, Sylvia Nicovich · 2022

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 …

Supplementary material to "A geomorphic-process-based cellular automata model of colluvial wedge morphology and stratigraphy" Open

Harrison J. Gray, Christopher B. DuRoss, Sylvia Nicovich, Ryan D. Gold · 2021

A geomorphic-process-based cellular automata model of colluvial wedge morphology and stratigraphy Open

Harrison J. Gray, Christopher B. DuRoss, Sylvia Nicovich, Ryan D. Gold · 2021

The development of colluvial wedges at the base of fault scarps following normal-faulting earthquakes serves as a sedimentary record of paleoearthquakes and is thus crucial in assessing seismic hazard. Although there is a large body of obs…

STEPS: Slip Time Earthquake Path Simulations Applied to the San Andreas and Toe Jam Hill Faults to Redefine Geologic Slip Rate Uncertainty Open

Alexandra E. Hatem, Ryan D. Gold, Richard W. Briggs, Katherine M. Scharer, Edward H. Field · 2021

Geologic slip rates are a time‐averaged measurement of fault displacement calculated over hundreds to million‐year time scales and are a primary input for probabilistic seismic hazard analyses, which forecast expected ground shaking in fut…

Quaternary Reelfoot Fault Deformation in the Obion River Valley, Tennessee, USA Open

Jaime Delano, Richard W. Briggs, Jessica Thompson Jobe, Ryan D. Gold, Simon E. Engelhart · 2021

Blind reverse faults are challenging to detect, and earthquake records can be elusive because deep fault slip does not break the surface along readily recognized scarps. The blind Reelfoot fault in the New Madrid seismic zone in the centra…

Surface slip variations and off-fault deformation patterns in complex cross-fault systems revealed from 3D high-resolution satellite optical image correlation: the 2019 Ridgecrest earthquakes (California, 2019) Open

Solène Antoine, Yann Klinger, Arthur Delorme, Kang Wang, Roland Bürgmann , et al. · 2021

The Ridgecrest sequence (Mw6.4 and Mw7.1, July 2019, California) is a cross-fault earthquake that has been observed using a wide range of geophysical and geological methods. The sequence ruptured consecutively two orthogonal cross-fault sy…

Comparison between the coseismic surface displacement during the 29 December 2020 Mw 6.4 Petrinja earthquake (Croatia) from optical image correlation and long-term geomorphological observations of cumulative displacements Open

Maxime Henriquet, Adrien Moulin, Matija Vukovski, Branko Kordić, Marko Budić , et al. · 2021

The Petrinja-Pokupsko fault-system is a NW-SE right-lateral fault system that ruptured during the 29 December 2020 Mw 6.4 earthquake (~40km south-east of Zagreb, Croatia). Field analysis revealed opening of cracks and offsets of s…

Localized fault-zone dilatancy and surface inelasticity of the 2019 Ridgecrest earthquakes Open

William D. Barnhart, Ryan D. Gold, James Hollingsworth · 2020

Relaxing segmentation on the Wasatch fault zone: impact on seismic hazard Open

Alessandro Valentini, Chrisopher DuRoss, Edward H. Field, Ryan D. Gold, Richard W. Briggs , et al. · 2020

The Wasatch fault zone (WFZ) is one of the most studied normal fault systems in the world and one of the most hazardous in the United States as it has paleoseismic evidence of repeated Holocene surface-faulting earthquakes and occ…

Seismic reflection imaging of the low-angle Panamint Valley normal fault system, eastern California, USA Open

Ryan D. Gold, William J. Stephenson, Richard W. Briggs, Christopher B. DuRoss, Eric Kirby , et al. · 2020

A fundamental question in seismic hazard analysis is whether <30º-dipping low-angle normal faults (LANFs) slip seismogenically. In comparison to more steeply dipping (45-60º) normal faults, LANFs have the pote…

Supplemental Material: Variable normal-fault rupture behavior, northern Lost River fault zone, Idaho, USA Open

Christopher B. DuRoss, M. P. Bunds, Ryan D. Gold, Richard W. Briggs, Nadine G. Reitman , et al. · 2019

Geosphere, December 2019, v. 15, no. 6, 1869-1892, doi:10.1130/GES02096.1, Supplemental Code. Matlab code Scarp_VS.m (Code S1).

Variable normal-fault rupture behavior, northern Lost River fault zone, Idaho, USA Open

Christopher B. DuRoss, M. P. Bunds, Ryan D. Gold, Richard W. Briggs, Nadine G. Reitman , et al. · 2019

The 1983 Mw 6.9 Borah Peak earthquake generated ∼36 km of surface rupture along the Thousand Springs and Warm Springs sections of the Lost River fault zone (LRFZ, Idaho, USA). Although the rupture is a well-studied example of multisegment …

Surface Rupture and Distributed Deformation Revealed by Optical Satellite Imagery: The Intraplate 2016 Mw6.0 Petermann Ranges Earthquake, Australia Open

Ryan D. Gold, Dan Clark, William D. Barnhart, Tamarah King, Mark Quigley , et al. · 2019

High‐resolution optical satellite imagery is used to quantify vertical surface deformation associated with the intraplate 20 May 2016 M w 6.0 Petermann Ranges earthquake, Northern Territory, Australia. The 21 ± 1‐km‐long NW trending ruptur…

Four Major Holocene Earthquakes on the Reelfoot Fault Recorded by Sackungen in the New Madrid Seismic Zone, USA Open

Ryan D. Gold, Christopher B. DuRoss, Jaime Delano, Randall W. Jibson, Richard W. Briggs , et al. · 2019

Three sequences of well‐documented, major ~ M 7+ earthquakes (1811–1812, ~1450, and ~900 CE) in the New Madrid seismic zone, USA, contribute significantly to seismic hazard in the region. However, it is unknown whether this <550‐year recur…

Preliminary Report on Engineering and Geological Effects of the July 2019 Ridgecrest Earthquake Sequence Open

Scott J. Brandenberg, Pengfei Wang, Chukwuebuka C. Nweke, Kenneth S. Hudson, Silvia Mazzoni , et al. · 2019

Issue Information Open

Noah S. Diffenbaugh, Suzana J. Camargo, Mónica Cárdenas, R. Carey, Rose M. Cory , et al. · 2018

No abstract is available for this article.

Modeling the Holocene slip history of the Wasatch fault (Utah) Open

Meike Bagge, Andrea Hampel, Ryan D. Gold · 2018

The Wasatch fault zone constitutes the eastern boundary of the actively extending Basin and Range Province\n(Utah) and poses a significant seismic hazard to the metropolitan areas along the Wasatch Range. A wealth of\npaleoseismological da…

Middle and Late Pleistocene glaciations in the southwestern Pamir and their effects on topography Open

Konstanze Stübner, Elena Grin, Alan J. Hidy, Mirjam Schaller, Ryan D. Gold , et al. · 2017

Tectonic summaries of magnitude 7 and greater earthquakes from 2000 to 2015 Open

G. P. Hayes, Emma K. Meyers, James W. Dewey, Richard W. Briggs, P. S. Earle , et al. · 2017

First posted January 11, 2017 For additional information, contact: Director, Geologic Hazards Science CenterU.S. Geological SurveyBox 25046, MS 966Denver, CO 80225-0046https://geohazards.usgs.gov/ This paper describes the tectonic summarie…

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