Filters: Tags: Tsunamis (X)
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The Cascadia Tsunami Deposit Database contains data on the location and sedimentological properties of tsunami deposits found along the Cascadia margin. Data have been compiled from 52 studies, documenting 59 sites from northern California to Vancouver Island, British Columbia that contain known or potential tsunami deposits. Bibliographical references are provided for all sites included in the database. Cascadia tsunami deposits are usually seen as anomalous sand layers in coastal marsh or lake sediments. The studies cited in the database use numerous criteria based on sedimentary characteristics to distinguish tsunami deposits from sand layers deposited by other processes, such as river flooding and storm surges....
This part of the data release provides an updated georeferenced guide to the main unit of Holocene sand ascribed to a sea flood on Anegada. Much of the data was previously summarized in Figure A4 of https://doi.org/10.1130/GES01356.1 . Plotted here, on the accompanying map, are all 573 localities in the updated compilation —nearly half of which do not provide much if any evidence for marine inundation. The main attribute of each locality is one of four summary categories: Pervasive—Sand covers more than 3/4 of area and typically thicker than 5 cm (132 localities). Patchy—Sand covers less than 3/4 of area and typically thinner than 5 cm (185 localities). Scant—Called “Sand scarce or absent” in https://doi.org/10.1130/GES01356.1...
Categories: Data;
Tags: British Virgin Islands,
Caribbean Sea,
corals,
farming,
geoscientificInformation,
This part of the release provides an updated list of places on Anegada, none of them more than 0.5 m above sea level, where observed sandy deposits may represent the Lisbon tsunami of 1755 C.E. These places were previously plotted in Figure A3 of https://doi.org/10.1130/GES01356.1, a paper in which the Lisbon tsunami is inferred to have had minor effects on Anegada compared with a sea flood a few centuries earlier. Details about the low, probable Lisbon deposits were previously reported in https://doi.org/10.1007/s11069-010-9622-6 (stratigraphy), https://doi.org/10.1007/s11069-011-9730-y (molluscan paleontology), and https://doi.org/10.1007/s11069-010-9706-3 (foraminifera).
Categories: Data;
Tags: British Virgin Islands,
Caribbean Sea,
biota,
corals,
geoscientificInformation,
This dataset contains a raster-based landcover map for Midway Atoll as of Jan 14, 2010. Landcover is classified into 9 different categories including various types of vegetation, bare ground, beach, and human structures. These categories were created using manual digitizing and unsupervised classification techniques on a DigitalGlobe WorldView-2 satellite image taken January 14, 2010.
On February 27, 2010, a tsunami originating near Chile arrived in Monterey Bay, California. This data release comprises two hours of pressure and near-bed velocity data spanning the largest tsunami waves. At the time, the U.S. Geological Survey Pacific Coastal and Marine Science Center had a remotely-controlled instrumented platform deployed adjacent to the Santa Cruz Municipal Wharf (mean depth 9 m) for collecting hydrodynamic and sediment transport data. In anticipation of the arrival of the tsunami, sampling was changed to better capture the event. Pressure and near-bed velocity profiles were measured at 1 Hz for 25 minutes every half hour. The velocities are influenced by surface waves, tsunami waves, and tidal...
A high-resolution raster dataset of simulated maximum tsunami elevations in the Oakland and Alameda area of California based on the Science Application for Risk Reduction (SAFRR) tsunami scenario
Categories: Data;
Types: Downloadable,
GeoTIFF,
Map Service,
Raster;
Tags: Alameda,
CMHRP,
Coastal and Marine Hazards and Resources Program,
Oakland,
PCMSC,
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