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Showing 1 to 15 of 15 for “"Paleoseismology"”.
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Neotectonics and Paleoseismology of the North Frontal Thrust System, southern California
… being used as an innovative predictive tool in paleoseismology.
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Paleoseismology and Archaeoseismology along the Southern Dead Sea Transform in Wadi 'Arabah Near the municipality of Aqaba, Jordan
… an ideal location to investigate both the paleoseismology and archaeoseismology of the region because it is situated directly along the active Dead Sea transform, and because the area has a long history of human occupation. The region is rich in archaeological ruins as a result, many of …
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Stratigraphic and microfossil evidence of repeated late Holocene tsunami inundation at Sitkalidak Island, Alaska
Seismic hazard models for Alaska require estimates of the size and frequency of prehistoric megathrust earthquakes. However, observations that place limits on the size of subduction paleoearthquakes along the Alaska-Aleutian subduction zone are scarce. To help place bounds on the along-strike …
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Lakes and Groundwater of the Rieti Basin, Central Italy: Hydrochemistry, Paleolimnology, and Seismologic Influences
A combination of water and sediment core samples were recovered and analyzed to study the hydrochemistry and paleolimnology of two lakes in the Rieti Basin and adjacent groundwater springs. Chemical and stable isotopic tracers were used to characterize water samples and to examine downcore changes …
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Diatom-based reconstructions of earthquake-induced paleoenvironmental change in coastal Alaska and Washington, USA
Great (Mw >8.5) earthquakes occur over long temporal intervals that extend beyond current historical (written and oral) records along most subduction zone coastlines often leading to the underestimation of magnitude, recurrence, and spatial extent of these events. Paleoseismic studies target low …
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Expanding the stratigraphic record of tsunami inundation along the semi-arid, siliciclastic coast of north-central Chile
On September 16, 2015, a Mw 8.3 earthquake struck offshore of the north-central Chile coast with a fault-rupture length of approximately 150 km. The earthquake triggered a tsunami that impacted 500 km of coastline from Huasco (28.5°S) to San Antonio (33.5°S), registering as much as 4.5 m on the …
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Quantifying coseismic land-level change along the Cascadia subduction zone in central Oregon
Understanding the behavior of past Cascadia Subduction Zone (CSZ) megathrust earthquakes is crucial for assessing rupture dynamics and predicting future seismic hazards. Estimates of the magnitude of coseismic subsidence produced by these great (>M 8.5) earthquakes provide critical constraints for …
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Slip rate of the West Tahoe Fault and the age of glacial deposits near Lake Tahoe, California
The West Tahoe Fault is the 45 km long, primary range-bounding fault of the Sierra Nevada at the latitude of Lake Tahoe, California. It is a N-NW striking, east dipping normal fault that has a pronounced terrestrial Holocene scarp extending from near Meyers, CA to Emerald Bay, where it continues …
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Improving Reno Earthquake Hazard Assessment Through a Ground-Motion Model Analysis and Paleoseismic Study
We present the results of two complimentary methods to assess earthquake hazards around Reno, Nevada. First, we evaluate the performance of the four NGA-West2 (2014) Active Crustal models, which are trained on a global dataset of ground motion recordings, in the context of the Reno area. We compare …
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Documenting the Earthquake History of the Thousand Springs Fault in Summer Lake Basin, Oregon, USA
<p>Defining seismic hazards in low-strain-rate regions such as the northwestern Basin and Range can be difficult due to the infrequency of earthquakes. Revealing the earthquake records of low-strain-rate regions can refine our understanding of the variability of earthquake sizes and recurrence …
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Decoding Seismic Hazard Enigmas via Next-Generation Paleoseismic Analyses: With Application to the Cascadia Subduction Zone and Beyond
In regions of infrequent moderate-to-large earthquakes, historic earthquake catalogs are often insufficient to provide inputs to seismic-hazard analyses (i.e., fault locations and magnitude-frequency relations) or to inform ground-motion predictions for certain seismic sources. As a result, …
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Hazard Identification and Coastal Stratigraphy in Crescent Harbor, Northeast Whidbey Island, Washington
Crescent Harbor marsh, on northeastern Whidbey Island, records evidence of co-seismic land-level change 1825 to 1925 cal. yrs. BP. The lithostratigraphy and diatom microfossil assemblages reveal a marsh peat abruptly overlain by intertidal mud, indicating rapid subsidence. Analysis of the …
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Mapping and Reconstructing the Paleotsunami Record in Queule, South-Central Chile
Records of past tsunamis help constrain the long-term characteristics of megathrust earthquakes and elucidate the role of sea-level in the preservation of tsunami deposits. Near Queule, south-central Chile (39.3˚S, 73.2˚W), three sand layers interpreted as tsunami deposits are interbedded with …
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Earthquakes in complex fault settings: Examples from the Oregon Cascades, Eastern California Shear Zone, and San Andreas fault
The surface expression of upper crustal deformation varies widely based on geologic settings. Normal faults within an intra-arc basin, strike-slip faulting within a wide shear zone, and creeping fault behavior all manifest differently and require a variety of techniques for analysis. In this …