The new science of tsunamis.
The Oregon coast has a justly deserved, worldwide reputation for its spectacular scenery. Because the coast lies at the interface between land and the Pacific Ocean, it is a zone of great instability and vulnerability, creating geologic hazards that can put people and property at risk. DOGAMI scientists work with coastal communities to identify these coastal hazards. In 2000, DOGAMI opened a Coastal Field Office in Newport to expand on the important ongoing research and mitigation efforts that will help minimize the effects of coastal geologic hazards.
Oregon's Tsunami Hazard Mitigation Program
Read more about Oregon's Tsunami Hazard Mitigation Program
This program provides the next generation of tsunami inundation maps along the state?s 362-mile-long Pacific coastline. The primary goal of Oregon?s five-year plan (2009 to 2013) is to reduce loss of life and property damage from tsunamis. Two other components of the program involve development of mitigation products that promote community preparedness and implementation of a coast-wide, volunteer-driven education and outreach initiative to support the National Weather Service?s TsunamiReady? program.
Variable Rupture Scenarios for Tsunami Simulations Inferred From a 10,000-Year History of Cascadia Megathrust Earthquakes
Read more about Variable Rupture Scenarios for Tsunami Simulations Inferred From a 10,000-Year History of Cascadia Megathrust Earthquakes
Differences in earthquake rupture scenarios for the Cascadia subduction zone contribute large uncertainties for simulations of tsunami inundation used to mitigate risk along the U.S. Pacific Northwest coast. Marine and coastal paleoseismic evidence now offer rare insight into rupture variability over multiple Cascadia earthquake cycles.
Validating Numerical Tsunami Simulations in Southern Oregon Using Late Holocene Records of Great Cascadia Earthquakes and Tsunamis (Bradley Lake)
Read more about Validating Numerical Tsunami Simulations in Southern Oregon Using Late Holocene Records of Great Cascadia Earthquakes and Tsunamis (Bradley Lake)
Marine and coastal paleoseismic evidence for Cascadia subduction earthquakes imply a range of rupture scenarios that provide model inputs for tsunami simulations. Coastal paleoseismic records spanning the past ~7000 yr include 13 tsunami deposits archived in Bradley Lake in southern Oregon. We test the smallest Cascadia tsunami scenarios capable of reaching the lake for consistency with paleoseismic data.
Reconstructing Hydrodynamic Flow Parameters of the 1700 Tsunami at Ecola Creek, Cannon Beach, Oregon
Read more about Reconstructing Hydrodynamic Flow Parameters of the 1700 Tsunami at Ecola Creek, Cannon Beach, Oregon
This study applies a simple sediment transport model, TsuSedMod (Jaffe and Gelfenbaum, 2007), to reconstruct the flow speed of the most recent Cascadia tsunami that flooded the region in 1700 using the thickness and grain size of sand layers deposited by the waves.
Tracking Prehistoric Cascadia Tsunami Deposits at Nestucca Bay, Oregon
Read more about Tracking Prehistoric Cascadia Tsunami Deposits at Nestucca Bay, Oregon
Three tsunamis triggered by great earthquakes on the Cascadia subduction zone have inundated Nestucca Bay, Oregon over the past 2000 years. The primary evidence includes layers of sandy sediment that bury tidal marshes submerged by earthquake-related subsidence.
New Tsunami Inundation and Evacuation Maps at Cannon Beach
Read more about New Tsunami Inundation and Evacuation Maps at Cannon Beach
The 2004 Indian Ocean magnitude 9.3 Sumatra-Andaman Islands earthquake and subsequent tsunami led to a re-evaluation of DOGAMI's tsunami hazard mapping approach. DOGAMI is leading a technical team of researchers and scientists using the latest technology in terrain mapping (lidar) and computer simulation to produce new tsunami inundation and evacuation maps for the entire Oregon coast. Cannon Beach served as the initial test site for this effort.
Florence Inundation Map
Read more about Florence Inundation Map
Last DOGAMI inundation map using the 1997 approach.
Read more about Siletz Bay
First DOGAMI tsunami inundation map project.