Publications
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A regime shift in sediment export from a coastal watershed during a record wet winter, California: Implications for landscape response to hydroclimatic extremes
Small, steep watersheds are prolific sediment sources from which sediment flux is highly sensitive to climatic changes. Storm intensity and frequency are widely expected to increase during the 21st century, and so assessing the response of small, steep watersheds to extreme rainfall is essential to understanding landscape response to climate change. During record winter rainfall in 2016–2017, the
Authors
Amy E. East, Andrew W. Stevens, Andrew C. Ritchie, Patrick L. Barnard, Pamela L. Campbell‐Swarzenski, Brian D. Collins, Christopher H. Conaway
The San Andreas Fault System--Complexities along a major transform fault system and relation to earthquake hazards
The San Andreas Fault System is a 1300-km-long transform boundary that accommodates motion between the North American and Pacific Plates. New technologies and data reveal rich details about the present configuration of faults, distribution of strain and associated seismic hazard on this complex network of faults. This contribution provides a brief summary of the geologic history of the San Andre
Authors
Katherine Scharer, Ashley Streig
Sensor suite: The Albuquerque Seismological Laboratory Instrumentation Testing Suite
To standardize parameters used in seismometer testing and calibration and to make these algorithms accessible to the seismological community, we have developed a new seismometer testing software package called Albuquerque Seismological Laboratory (ASL) Sensor Test Suite. This software is written in Java and makes use of Seismological Exchange for Earthquake Data (SEED) format. Our goal is not to b
Authors
A. Kearns, Adam T. Ringler, James Holland, Tyler Storm, David C. Wilson, Robert E. Anthony
Deciphering the dynamics of inorganic carbon export from intertidal salt marshes using high-frequency measurements
The lateral export of carbon from coastal marshes via tidal exchange is a key component of the marsh carbon budget and coastal carbon cycles. However, the magnitude of this export has been difficult to accurately quantify due to complex tidal dynamics and seasonal cycling of carbon. In this study, we use in situ, high-frequency measurements of dissolved inorganic carbon (DIC) and water fluxes to e
Authors
Sophie N. Chu, Zhaohui Aleck Wang, Meagan Gonneea Eagle, Kevin D. Kroeger, Neil K. Ganju
Karachi tides during the 1945 Makran tsunami
This paper extends and detides a Karachi tide-gauge record as an observational basis for assessing Indian Ocean tsunami risk. The extended marigram encompasses the time of the great 1945 Makran earthquake of early November 28, local time, and of the ensuing tsunami, which continued into November 29. The marigram was published previously as a 9-h excerpt that begins 1 h after the earthquake. The fu
Authors
Loyce M. Adams, Brian F. Atwater, Haider Hasan
2018 report on incorporating sedimentary basin response into the design of tall buildings in Seattle, Washington
On March 22, 2018, the Seattle Department of Construction and Inspections (SDCI) and the U.S. Geological Survey (USGS) convened a workshop of engineers and seismologists to provide guidance on incorporating sedimentary basin response into the design of tall buildings in Seattle. This workshop provided recommendations that build on those from a March 2013 workshop (Chang and others, 2014), primaril
Authors
Erin A. Wirth, Susan W. Chang, Arthur Frankel
A new Enceladus global control network, image mosaic, and updated pointing kernels from Cassini's thirteen-year mission
NASA's Cassini spacecraft spent 13 years exploring the Saturn system, including 23 targeted flybys of the small, geologically active moon Enceladus. These flybys provided a wealth of image data from Cassini's Imaging Science Subsystem. To improve the usability of the Enceladus data set, we created a new, global photogrammetric control network for Enceladus that enabled compilation of a versatile c
Authors
Michael T. Bland, Tammy L. Becker, Kenneth Edmundson, Thomas Roatsch, Brent Archinal, D. Takir, G. W. Patterson, G. C. Collins, P. M. Schenk, R. T. Pappalardo, Debbie Cook
Using tectonic tremor to constrain seismic‐wave attenuation in Cascadia
Tectonic tremor can be used to constrain seismic‐wave attenuation for use in ground‐motion prediction equations (GMPEs) in regions where moderately sized earthquakes occur infrequently. Here we quantify seismic‐wave attenuation by inverting tremor ground motion amplitudes in different frequency bands of interest, to determine frequency dependence of and spatial variations in seismic‐wave attenuati
Authors
Geena F. Littel, Amanda M. Thomas, Annemarie S. Baltay
Mw 4.2 Delaware Earthquake of 30 November 2017
The 30 November 2017 Delaware earthquake with magnitude MW 4.2 occurred beneath the northeastern tip of the Delmarva Peninsula near Dover, Delaware. The earthquake and its aftershocks provide an opportunity to evaluate seismicity in a passive margin setting using much improved coverage by high-quality permanent broadband seismometers at regional distance ranges in the central and eastern United St
Authors
Won-Young Kim, Mitchell Gold, Joseph Ramsay, Anne Meltzer, David Wunsch, Stefanie Baxter, Vedran Lekic, Phillip Goodling, Karen Pearson, Lara S. Wagner, Diana C. Roman, Steven Golden, Thomas L. Pratt
A digital elevation model for simulating the 1945 Makran tsunami in Karachi Harbour
The digital elevation model documented here provides a tool for calibrating tsunami models to effects of the 1945 Makran tsunami that were observed in Karachi Harbour. The DEM bathymetry is derived from soundings made mainly during the first 8 years post-tsunami. While deficient in its portrayal of interior tidelands and upland topography, the DEM accurately represents the setting of a tide gauge
Authors
Haider Hasan, Brian F. Atwater, Shoaib Ahmed
Developing hydro-meteorological thresholds for shallow landslide initiation and early warning
Consistent relations between shallow landslide initiation and associated rainfall characteristics remain difficult to identify, due largely to the complex hydrological and geological processes causing slopes to be predisposed to failure and those processes that subsequently trigger failures. Considering the importance of hillslope hydrology for rainfall-induced landsliding, we develop and test a m
Authors
Benjamin B. Mirus, Michael D. Morphew, Joel B. Smith
Holocene fault reactivation in the eastern Cascades, Washington
Significant uncertainty remains concerning how and where crustal shortening occurs throughout the eastern Cascade Range in Washington State. Using light detection and ranging (lidar) imagery, we identified an ∼5‐km‐long lineament in Swakane canyon near Wenatchee, roughly coincident with a strand of the Entiat fault. Topographic profiles across the lineament reveal a southwest‐side‐up break in slop
Authors
Benjamin L. Carlson, Elizabeth R. Schermer, Colin B. Amos, William J. Stephenson, Brian L. Sherrod, Shannon A. Mahan