Tsunami & Marine Debris

Tsunami & Marine Debris

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  1. Probabilistic Tsunami Hazard Assessment at Seaside, Oregon, for Near- and Far-Field Seismic Sources

    The first probabilistic tsunami flooding maps have been developed. The methodology, called probabilistic tsunami hazard assessment (PTHA), integrates tsunami inundation modeling with methods of probabilistic...

  2. Seaside, Oregon, Tsunami Pilot Study : Modernization of FEMA Flood Hazard Maps

    FEMA Flood Insurance Rate Map (FIRM) guidelines do not currently exist for conducting and incorporating tsunami hazard assessments that reflect the substantial advances in tsunami research achieved in the last...

  3. Late Holocene Tsunami Deposits at Salt Creek, Washington, USA

    We interpret two thin sand layers in the estuarine marsh at Salt Creek, on the southern shore of the Strait of Juan de Fuca, as the products of tsunamis propagated by earthquakes at the Cascadia subduction...

  4. Establishing the Inundation Distance and Overtopping Height of Paleotsunami from the Late-Holocene Geologic Record at...

    Mapping and stratigraphic investigations of back barrier, open-coastal plain sites have been used to establish minimum inundation distances and wave heights of tsunami produced by great subduction zone...

  5. Mapped Overland Distance of Paleotsunami High-Velocity Inundation n Back-Barrier Wetlands of the Central Cascadia Margin,...

    Investigations of back-barrier, open-coastal plain settings have been used to establish minimum inundation distances of prehistoric tsunamis produced by great subduction zone earthquakes in the central Cascadia...

  6. Earthquake and Tsunami Forecasts: Relation of Slow Slip Events to Subsequent Earthquake Rupture

    The 5 September 2012 Mw 7.6 earthquake on the Costa Rica subduction plate boundary followed a 62-y interseismic period. High-precision GPS recorded numerous slow slip events (SSEs) in the decade leading up to...

  7. Paleotsunami Inundation of a Beach Ridge Plain: Cobble Ridge Overtopping and Interridge Valley Flooding in Seaside, Oregon,...

    The Seaside beach ridge plain was inundated by six paleotsunamis during the last ∼2500 years. Large runups (adjusted >10m in height) overtopped seawardmost cobble beach ridges (7m elevation) at ∼1.3 and...

  8. Late Holocene Paleoseismicity along the Northern Oregon Coast

    Marsh paleoseismological studies were conducted in four bays (Necanicum, Nestucca, Siletz, and Yaquina) along the northern Oregon coast and compared with completed studies in two other bays (Netarts and Alsea)....

  9. Strain Energy Release from the 2011 9.0 Mw Tōhoku Earthquake, Japan

    The purpose of this paper is to compare the strain energy released due to elastic rebound of the crust from the tragic 2011 9.0 Mw Tōhoku earthquake in Japan with the observed radiated seismic energy. The...

  10. Geology of the Seal Rock Area

    Twelve years ago I was new to the Oregon coast and eager to learn about the natural setting.

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