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Full-Text Articles in Geophysics and Seismology
Historical Tsunami Observability For Izu–Bonin–Mariana Sources, Walter Szeliga, Rachelle Reisinger, Breanyn T. Macinnes
Historical Tsunami Observability For Izu–Bonin–Mariana Sources, Walter Szeliga, Rachelle Reisinger, Breanyn T. Macinnes
Geological Sciences Faculty Scholarship
The Izu–Bonin–Mariana Subduction System (IBM) is one of the longest subduction zones in the world with no instrumental history of shallow focus, great earthquakes (Mw > 8). Over the last 50 years, researchers have speculated on the reason for the absence of large magnitude, shallow seismicity on this plate interface, exploring factors from plate age to convergence rate. We approach the question from a different point of view: what if the IBM has hosted great earthquakes and no documentable evidence was left? To address the question of observability, we model expected tsunami wave heights from nine great earthquake scenarios on the …
Increased Caribbean Seismicity And Volcanism During Minima In Earth's Rotation Rate: Search For A Physical Mechanism And A 2030 Forecast, Roger Bilham, Walter Szeliga, David Mencin, Rebecca Bendick
Increased Caribbean Seismicity And Volcanism During Minima In Earth's Rotation Rate: Search For A Physical Mechanism And A 2030 Forecast, Roger Bilham, Walter Szeliga, David Mencin, Rebecca Bendick
Geological Sciences Faculty Scholarship
Three quarters of all Mw ≥ 6.6 earthquakes and volcanic eruptions surrounding the Caribbean plate occur preferentially during periods of decadal minima in Earth’s angular spin velocity. This correlation is revealed most clearly as a 4–6 years phase lag following the first derivative of the length of the day (LOD), Earth’s angular deceleration. We show that local strains and displacements resulting from oblateness changes, or plate boundary stresses associated with changes in tropical rotation rates are orders of magnitude lower than those typically associated with earthquake or volcano triggering. Notwithstanding the absence of a satisfactory causal physical mechanism, the relationship …
Assessing The Mechanics Of Two Earthquake Clusters In The Basin And Range Province, Jamie Hansen
Assessing The Mechanics Of Two Earthquake Clusters In The Basin And Range Province, Jamie Hansen
All Master's Theses
The seismicity in the Basin and Range Province of the western United States often manifests as clusters of earthquakes occurring over brief windows of time, lasting from months to years. Two different earthquake clusters occurring between 2014 and 2018, near Challis, Idaho and northwestern Nevada, were assessed in this study. The seismic activity in the southeastern section of the Challis cluster began with a M5.2 earthquake that was likely the main-shock earthquake in an aftershock sequence. The northwestern section of the Challis cluster does have several potential candidates for a main-shock earthquake, but none have been identified as a start …