A5046732475- earthquake and tectonic studies
- High-pressure geophysics and materials
- Geological and Geochemical Analysis
- Seismology and Earthquake Studies
- Earthquake Detection and Analysis
- Seismic Imaging and Inversion Techniques
- Geology and Paleoclimatology Research
- Seismic Waves and Analysis
- Methane Hydrates and Related Phenomena
- Drilling and Well Engineering
- Morphological variations and asymmetry
- Target Tracking and Data Fusion in Sensor Networks
- Geological Studies and Exploration
- Geological formations and processes
- Archaeology and ancient environmental studies
- Maritime and Coastal Archaeology
- Advanced Algorithms and Applications
- Hydrocarbon exploration and reservoir analysis
Sandia National Laboratories
2025
University of Michigan
2019-2022
Boise State University
2016-2022
United States Air Force Research Laboratory
2021-2022
Abstract There is a strong need to model potential rupture behaviors for the next Cascadia megathrust earthquake. However, there exists significant uncertainty regarding extent of downdip and speed. To address this problem, we study how transition region (i.e., gap), which separates locked from slow‐slip regions, influences coseismic propagation using 2‐D dynamic simulations governed by slip‐weakening friction law. We show that through gap strongly controlled amount accumulated tectonic...
From California to British Columbia, the Pacific Northwest coast bears an omnipresent earthquake and tsunami hazard from Cascadia subduction zone. Multiple lines of evidence suggests that magnitude eight greater megathrust earthquakes have occurred - most recent being 321 years ago (i.e., 1700 A.D.). Outstanding questions for next great event include where it will initiate, what conditions are favorable rupture span convergent margin, how much slip may be expected. We develop first 3-D fully...
Abstract Dynamic rupture models are physics-based simulations that couple fracture mechanics to wave propagation and used explain specific earthquake observations or generate a suite of predictions understand the influence frictional, geometrical, stress, material parameters. These can model single earthquakes multiple cycles. The objective this article is provide self-contained practical guide for students starting in field dynamics. Senior researchers who interested learning first-order...
Abstract The discrimination problem in seismology aims to accurately classify different underground source types based on local, regional, and/or teleseismic observations of ground motion. Typical discriminant approaches are rooted fundamental, physics-based differences radiation pattern or wave excitation, which can be frequency-dependent and may not make use the full waveform. In this article, we explore whether phase amplitude distances derived from dynamic time warping (DTW) elastic...
Abstract Tsunamis from earthquakes of various magnitudes have affected Cascadia in the past. Simulations M w 7.5–9.2 earthquake constrained by rupture physics and geodetic locking models show that ≥ 8.5 events initiating middle segments subduction zone can create coastal tsunami amplitudes comparable to those largest expected event. Our simulations reveal concave coastline geometry Pacific Northwest focuses energy between latitudes 44° 45° Oregon. The possible are largely insensitive choice...
Abstract The Kodiak Islands lie near the southern terminus of 1964 Great Alaska earthquake rupture area and within subduction zone segment. Both local trans-Pacific tsunamis were generated during this devastating megathrust event, but tsunami source region causative faults are poorly understood. We provide an updated view hazard for through modeling geophysical data analysis. Using seismic bathymetric data, we characterize a regionally extensive seafloor lineament related to shelf fault...
ABSTRACT The recent 2019 Ridgecrest earthquake sequence in southern California jostled the seismological community by revealing a complex and cascading foreshock series that culminated Mw 7.1 mainshock. But central Garlock fault, despite being located immediately south of this sequence, did not coseismically fail. Instead, fault underwent postseismic creep exhibited sizeable swarm. dynamic details rupture process during mainshock are largely unknown, as is amount stress needed to bring...
PreviousNext You have accessSymposium on the Application of Geophysics to Engineering and Environmental Problems 2016Archaeological GeophysicsAuthors: Zhong ShihangPeter HutchinsonMatthew TolandJason FloydTate MeehanRebekkah LeeMarlon RamosDylan MikesellTimothy de SmetZhong ShihangChina Academy Railway Sciences, Peter HutchinsonTHG Geophysics, Matthew TolandTHG Jason FloydMountain Research, LLC, Tate MeehanBoise State University, Rebekkah LeeBoise Marlon RamosBoise Dylan MikesellBoise...
Physics-based simulations are crucial to assessing the seismic hazard in Cascadia subduction zone (CSZ), requiring assumptions about fault stress and material properties. Geodetic slip deficit models (SDMs) may inform initial stresses governing megathrust earthquake dynamics. We present a unified workflow linking SDMs 3D dynamic rupture simulations, 22 scenarios unravel trade-offs of on SDMs, rigidity, pore fluid pressure. find that margin-wide requires large central CSZ. Comparisons between...
The discrimination problem in seismology aims to accurately classify different underground source types based on local, regional or teleseismic observations of ground motion. Typical discriminant approaches are rooted fundamental, physics-based differences radiation pattern wave excitation, which can be frequency dependent and may not make use the full waveform. In this paper, we explore a new method for event using phase amplitude distances derived from dynamic time warping (DTW) elastic...
From California to British Columbia, the Pacific Northwest coast bears an omnipresent earthquake and tsunami hazard from Cascadia subduction zone. Multiple lines of evidence suggests that magnitude eight greater megathrust earthquakes have occurred - most recent being 321 years ago (i.e., 1700 A.D.). Outstanding questions for next great event include where it will initiate, what conditions are favorable rupture span convergent margin, how much slip may be expected. We develop first 3-D fully...
Earth and Space Science Open Archive This preprint has been submitted to is under consideration at Geophysical Research Letters. ESSOAr a venue for early communication or feedback before peer review. Data may be preliminary.Learn more about preprints preprintOpen AccessYou are viewing the latest version by default [v1]Relative tsunami hazard from segments of Cascadia subduction zone Mw 7.5-9.2 earthquakesAuthorsAmirSalareeiDYiheHuangiDMaron DRamosiDSteinSethiDSee all authors Amir...
The recent 2019 Ridgecrest earthquake sequence in Southern California jostled the seismological community by revealing a complex and cascading foreshock series that culminated M7.1 mainshock. But central Garlock fault, despite being located immediately south of this sequence, did not coseismically fail. Instead, fault underwent post-seismic creep exhibited sizeable swarm. dynamic details rupture process during mainshock are largely unknown, as is amount stress needed to bring failure. We...
<p>The Cascadia Subduction Zone (CSZ) is a 1,200 km plate boundary that poses the greatest seismic hazard in Pacific Northwest United States. tsunamis have been primary subject of studies on tsunami scenarios along States west coast. However, geographic extent as well final size potential future ruptures are poorly known. This has caused result previous to remain mostly hypothetical and simply serve “worst-case...
Dynamic rupture models are physics-based simulations that couple fracture mechanics to wave propagation and used explain specific earthquake observations or generate a suite of predictions understand the influence frictional, geometrical, stress material parameters. These can model single earthquakes multiple cycles. The objective this paper is provide self-contained practical guide for students starting in field dynamics. Senior researchers who interested learning first order constraints...
The Kodiak Islands lie near the southern terminus of 1964 Great Alaska earthquake rupture area and within subduction zone segment. Both local trans-Pacific tsunamis were generated during this devastating megathrust event, but tsunami source region causative faults are poorly understood. We provide an updated view hazard for through modelling geophysical data analysis. Using seismic bathymetric data, we characterize a regionally extensive sea floor lineament related to shelf fault zone, with...