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Showing 1 to 9 of 9 for “"tsunami deposits"”.
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The 2004 and 1861 Tsunami Deposits on Simeulue Island, Western Sumatra
<p>Megathrust earthquakes and associated tsunamis along the subduction zone along western Sumatra represent a significant seismic hazard that is not well understood. I present the results of mapping, paleoseimologic, and geochronologic studies of tsunami deposits exposed on Simeulue Island, western …
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Sediment Provenance of Tsunami Deposits: Implications for Assessing the Relative Intensity of Paleotsunamis from the Sendai Coastline of Japan
<p>The 2011 Tohoku tsunami impacted the northeastern coast of Japan and caused unexpected damages due to the underestimation of this type of hazard. Of particular importance is the fact that geologic evidence for a predecessor event, the Jogan tsunami (CE 869), could have forecasted the severity of …
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Geomorphology of Deposits from the 2004 Indian Ocean Tsunami, Tamil Nadu, Southeastern India
… geologically suitable repositories for tsunami deposits are not well defined. This project characterizes the geomorphic environments on the southeastern coast of India that preserved depositional evidence of the catastrophic tsunami created by the M<sub>w</sub>9.0-9.3 Sumatra-Andaman …
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Investigating Taphonomic Changes of Deposits and Modeling of the 2010 Earthquake and Tsunami in South-Central Chile
… written catalog of historic earthquakes and tsunamis, but such records can be subject to inconsistencies. Dated tsunami deposits are more objective data that provide hard evidence of past tsunamis. The inland extent of deposits from past tsunamis (paleodeposits) can be used in tsunami …
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Refining tsunami inundation limits for the 1700 CE Cascadia earthquake: detailed mapping of fine-grained deposits and diatom biostratigraphy at the Salmon River estuary, central Oregon
… evidence of coseismic subsidence and sandy tsunami deposits preserved in coastal wetlands provide tangible evidence of the 1700 CE Cascadia Subduction Zone (CSZ) earthquake and tsunami. Such evidence has been used to evaluate earthquake source models by comparing simulated tsunami inundation …
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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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Modeling of Potential Historical Tsunamis from Large Earthquakes in the Izu-Bonin Mariana Subduction Zone
… which has since been proven false. We use the tsunami model GeoClaw (v5.6.0) with adjoint-guided refinement level flagging to simulate IBM earthquakes in three separate segments to produce estimates of wave heights at locations around the Pacific Basin that have the potential for written …
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Assessing the Use of Tsunami Simulations as a Tool to Predict Source Magnitudes and Locations of Paleoearthquakes in Chile
A long-term goal of paleotsunami studies is the ability to predict paleoearthquake parameters based on tsunami deposits found on land. Chile provides an exemplary location for testing methods of making these predictions because the historical record includes 41 major earthquakes as far back as 1562 …
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Assessing the Rates of Post-Depositional Change Within 2004 Indian Ocean Sediments: Implications for Long-Term Records of Paleotsunamis
… are commonly used to examine patterns of tsunami inundation occurring over centennial to millennial timescales, but the impacts of post-depositional change on geologic reconstructions are unknown. In Sumatra, the taphonomic character (i.e., test surface condition) of a foraminifer can …