Publications
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Detection and assessment of a large and potentially tsunamigenic periglacial landslide in Barry Arm, Alaska
The retreat of glaciers in response to global warming has the potential to trigger landslides in glaciated regions around the globe. Landslides that enter fjords or lakes can cause tsunamis, which endanger people and infrastructure far from the landslide itself. Here we document the ongoing movement of an unstable slope (total volume of 455 million m3) in Barry Arm, a fjord in Prince William Sound
Authors
Chunli Dai, Bretwood Higman, Patrick J. Lynett, Mylène Jacquemart, Ian Howat, Anna K. Liljedahl, Anja Dufresne, Jeffery T. Freymueller, Marten Geertsema, Melissa Ward Jones, Peter J. Haeussler
On the size of the flare associated with the solar proton event in 774 AD
The 774 AD solar proton event (SPE) detected in cosmogenic nuclides had an inferred >1 GV (>430 MeV) fluence estimated to have been ~30–70 times larger than that of the 1956 February 23 ground level event (GLE). The 1956 GLE was itself ~2.5 times larger at >430 MeV than the episode of strong GLE activity from 1989 August–October. We use an inferred soft X-ray (SXR) class of X20 ± 10 for the 1956 F
Authors
E. W. Cliver, H. Hayakawa, Jeffrey J. Love, D. F. Neidig
Evaluation of seismic hazard models with fragile geologic features
We provide an overview of a 2019 workshop on the use of fragile geologic features (FGFs) to evaluate seismic hazard models. FGFs have been scarcely utilized in the evaluation of seismic hazard models, despite nearly 30 yr having passed since the first recognition of their potential value. Recently, several studies have begun to focus on the implementation of FGFs in seismic hazard modeling. The wo
Authors
Mark W. Stirling, Mike Oskin, J. Ramon Arrowsmith, Anna H. Rood, Christine A. Goulet, Lisa Grant Ludwig, Tamarah King, Albert Kottke, Julian C. Lozos, Chris L M Madugo, Devin McPhillips, Dylan Rood, Norman Sleep, Christine Wittich
Post-glacial Mw 7.0-7.5 earthquakes on the North Olympic fault zone, Washington
Holocene crustal faulting in the northern Olympic Peninsula of Washington State manifests in a zone of west‐northwest‐striking crustal faults herein named the North Olympic fault zone, which extends for ∼80 km∼80 km along strike and includes the Lake Creek–Boundary Creek fault to the east and the Sadie Creek fault and newly discovered scarps to the west. This study focuses on the Sadie Creek fau
Authors
Elizabeth R. Schermer, Colin B. Amos, W. Cody Duckworth, Alan Nelson, Stephen J. Angster, Jaime Delano, Brian Sherrod
Lava–water interaction and hydrothermal activity within the 2014–2015 Holuhraun Lava Flow Field, Iceland
Lava that erupted during the 2014–2015 Holuhraun eruption in Iceland flowed into a proglacial river system, resulting in aqueous cooling of the lava and an ephemeral hydrothermal system. We carried out a monitoring study of this system from 2015 to 2018 to document the cooling of the lava over this time, using thermocouple measurements and data-logging sensors. The heat loss rate from advection th
Authors
Colin M. Dundas, Laszlo P. Keszthelyi, Einat Lev, M. Elise Rumpf, Christopher W. Hamilton, Armann Hoskuldsson, Thorvaldur Thordarson
Distribution of aseismic deformation along the central San Andreas and Calaveras Faults from differencing repeat airborne lidar
Fault creep reduces seismic hazard and serves as a window into plate boundary processes; however, creep rates are typically constrained with sparse measurements. We use differential lidar topography (11–13 year time span) to measure a spatially dense surface deformation field along a 150 km section of the Central San Andreas and Calaveras faults. We use an optimized windowed‐iterative‐closest‐poin
Authors
Chelsea P Scott, Stephen B. DeLong, J Ramon Arrosmith
Geomorphic and sedimentary effects of modern climate change: Current and anticipated future conditions in the western United States
Hydroclimatic changes associated with global warming over the past 50 years have been documented widely, but physical landscape responses are poorly understood thus far. Detecting sedimentary and geomorphic signals of modern climate change presents challenges owing to short record lengths, difficulty resolving signals in stochastic natural systems, influences of land use and tectonic activity, lon
Authors
Amy E. East, Joel B. Sankey
Spectral wave-driven bedload transport across a coral reef flat/lagoon complex
Coral reefs are an important source of sediment for reef-lined coasts by helping to maintain beaches while also providing protection in the form of wave energy dissipation. Understanding the mechanisms by which sediment is delivered to the coast as well as better constraining the total volumes generated are critical for projecting future coastal change. A month-long hydrodynamics and sediment tran
Authors
Kurt J. Rosenberger, Curt D. Storlazzi, Olivia Cheriton, Andrew Pomeroy, Jeff E. Hansen, Ryan Lowe, Mark Buckley
Using a large-n seismic array to explore the robustness of spectral estimations
Spectral analysis is widely used to estimate and refine earthquake source parameters such as source radius, seismic moment, and stress drop. This study aims to quantify the precision of the single spectra and empirical Green's function spectral ratio approach using the Large‐n Seismic Survey in Oklahoma (LASSO) array. The dense station coverage in an area of local saltwater disposal offers a uniqu
Authors
K.B. Kemna, A.F. Pena Castro, R.M. Harrington, Elizabeth S. Cochran
Tall building performance-based seismic design using SCEC broadband platform site-specific ground motion simulations
The scarcity of strong ground motion records presents a challenge for making reliable performance assessments of tall buildings whose seismic design is controlled by large-magnitude and close-distance earthquakes. This challenge can be addressed using broadband ground-motion simulation methods to generate records with site-specific characteristics of large-magnitude events. In this paper, simulate
Authors
Kuanshi Zhong, Ting Lin, Greg Deierlein, Robert Graves, Fabio Silva, Nicolas Luco
Modeling three-dimensional flow over spur-and-groove morphology
Spur-and-groove (SAG) morphology characterizes the fore reef of many coral reefs worldwide. Although the existence and geometrical properties of SAG have been well documented, an understanding of the hydrodynamics over them is limited. Here, the three-dimensional flow patterns over SAG formations, and a sensitivity of those patterns to waves, currents, and SAG geometry were characterized using the
Authors
Renan da Silva, Curt D. Storlazzi, Justin S. Rogers, Johan Reyns, Robert T. McCall
Injection‐induced earthquakes near Milan, Kansas, controlled by Karstic Networks
Induced earthquakes from waste disposal operations in otherwise tectonically stable regions significantly increases seismic hazard. It remains unclear why injections induce large earthquakes on non‐optimally oriented faults kilometers below the injection horizon, particularly since fluids are not injected under pressure, but rather poured, into the well as observed in the Milan, Kansas area. Here
Authors
Charlene Joubert, Reza Sohrabi, Justin Rubinstein, Gunnar Jansen, Stephen A Miller