“Puget Sound will be greatly impacted by a tsunami from a Cascadia Subduction Zone earthquake,” says Maximilian Dixon, hazards and outreach … The southern portion of the island is uplifted and very little inundation is observed in these regions. But DNR scientists have created … The Washington Geological Survey develops, produces, and publishes a large variety of maps and reports on the hazards faced by our state. Thrust faults, such as the Seattle Fault, are believed capable of generating smaller but also deadly and destructive tsunami’s within Puget Sound. Introduction. Within several minutes of the earthquake, the initial tsunami (Panel 1) is split into a tsunami that travels out to the deep ocean (distant tsunami) and another tsunami that travels towards the nearby coast (local tsunami). 2A), or by trig-gering tsunamigenic slope failures. 9 Seattle, WA Purposes: Create additional partnerships to address tsunami and landslide hazards in the Puget Sound Region Develop an action plan to generate tsunami inundation maps and other mitigation products for Puget Sound communities Water levels at Selected Locations (4 m = 13 ft.) Time … But Forson says you also need to know what to do when the shaking happens. The maximum amplitude of the tsunami waves generate was recorded in Pichilemu, Chile at 3 meters or about 10 feet. To the east is Culmback Dam … (University of California-EERC photo) Tsunami Impacts USGS Science Priorities Tsunamis can be generated in Puget Sound by both landslides and earthquakes. Detailed information can be found in the map or report. ♦ Faults that cross Puget Sound can also generate tsunamis farther inland, as happened when an earthquake on the Seattle fault generated a tsunami about 1,100 years ago. The height above mean sea level of the two oppositely traveling tsunamis is approximately half that of the original tsunami (Panel 1). Sources: National Geophysical Data Center, NOAA, USGS Crescent City, Calif., is heavily damaged following a tsunami generated in Alaska on March 28, 1964. Puget Sound Tsunami/Landslide Workshop January 23 - 24, 2001 NOAA/Sand Point, Bldg. The earthquakes, tsunamis, and the proximity of volcanos are all part of the same system. This evidence was especially well‐preserved at Cultus Bay, which opens southward at the southern end of Whidbey Island, 40 km northof Seattle. Scientists with the Washington Department of … New Puget Sound Tsunami Model for Subduction Earthquake. The most recent earthquake and tsunami on the Cascadia subduction zone was a M 9.0 earth-quake in 1700 A.D. (Atwater, 1987; Atwater et al., 2005; Yama- guchi et al., 1997). Lab # 2 Tsunami Hazards in Puget Sound Tsunami Hazards: A tsunami is a wave train, or series of waves, generated in a body of water by an impulsive disturbance that vertically displaces the water column from its equilibrium condition. Map not to scale. Coastal communities of Puget Sound are susceptible to tsunami inundation from multiple sources. Earthquakes, volcanic eruptions, landslides, and other mass movements above or below water all … Shallow fault quakes: There are more than a dozen shallow faults in the Puget Sound region, and geologists estimate 27 powerful quakes in the last 13,000 years. All of the following resources can also be found on our Publications and Maps page, through the Videos you watch may be added to the TV's watch history and influence TV recommendations. This page contains a collection of these resources and a brief description of each item. If an Alaskan earthquake triggers a tsunami that could hit Washington, residents would have a few hours to seek higher ground. It is important for boaters in coastal areas, including the Puget Sound, to know what to do if they are on their boat when a tsunami strikes. “For the people on the outer coast all the way into Puget Sound, and essentially all of the western Washington area – and that extends as far down into northern California and lower British Columbia area as well – they would experience a strong degree of shaking. Two sources of potential tsunami hazard that threaten the region are earthquakes on crustal faults in the Puget Lowlands, or earthquakes originating on the Cascadia subduction zone. ♦ Tsunamis generated by local faults or landslides may affect only limited areas, but can be devastating at those locations. Puget Sound Tsunami Sources 2002 Workshop: Geospatial Data. The northern portion of the island subsides, increasing the level of ooding in Eagle Harbor and other coastal regions to the north. The most recent rupture on … [3] A tsunami in Puget Sound is believed to have accompanied this earthquake. Westport currently is the only location with … Seattle is similarly protected by the topography of Puget Sound. Some low-lying areas around Puget Sound were flooded by the tsunamis generated by these earthquakes. Tsunamis: Be prepared, not scared. If playback doesn't begin shortly, try restarting your device. Coastal Tsunamis A Tsunami is a large ocean wave caused by earthquakes and underwater landslides. Faults in central and northern Puget Sound are known to have ruptured in large (M 7) earthquakes in the last few millennia. The 1949 Olympia earthquake triggered a landslide in the Tacoma Narrows that caused a 6 to 8-foot tsunami that affected ne arby shorelines three days after the earthquake. Atwater and Moore [1992] have interpreted sandlayers found at West Point and Cultus Bay as tsunami deposits. can cause strong shaking as far inland as Puget Sound, and can generate tsunamis via seafloor deformation (Fig. Though it looks idyllic now, geologists have uncovered evidence of a tsunami that occurred there more than a thousand years ago. Washington State has the second-highest tsunami risk behind Hawaii because of its close proximity to the tectonic plates, crustal faults, and large subduction zone. A workshop jointly sponsored by the NOAA Center for Tsunami Inundation Mapping Efforts, the U.S. Geological Survey, the Washington State Military Department Emergency Management Division, and the Washington State Department of Natural Resources was held in June 2002 at the NOAA Pacific Marine Environmental … The second earthquake source in the Salish Sea is … Puget Sound Tsunami Sources-2002; Tsunami. Though no significant tsunami wave arrived on the west coast , and Hawaii experienced smaller waver than … Works about tsunami hazards in other parts of the Cascadia subduction zone .....15 VIII. by Eric Holdeman / August 19, 2019. Tsunami is a Japanese word that means "harbor wave." V. Works about tsunami hazards in Puget Sound.....12 VI. geology Lakes, rivers & Puget Sound rivers & Puget Sound Uncategorized. Some unusual occurrences, like waves creating a loud “roaring” sound similar to that of a jet, as well as excessive frothiness also indicate an unusually high wave. The coast is now the home of one of the state’s largest network of warning sirens called All Hazard Alert Broadcast (AHABs). As they approach the coast, their speed decreases and their amplitude increases, reaching heights of over 100 feet. Survivors of tsunamis all over the world report hearing a ‘sucking’ sound before the waves strike the beach. The Seattle Fault cuts across Puget Sound (through Seattle and Bainbridge Island) and can create a tsunami that a ects the island immediately. Works about tsunami hazards in the Strait of Juan de Fuca .....14 VII. And when I say a strong degree of shaking, you would not be able to stand, you would be forced to the ground, just because … Stevan Morgain, Associated Press A rendering of the 60-foot steel tsunami … The worst of the tsunami would hit the Pacific Coast and San Juan Islands area — but the interior of Puget Sound between Edmonds, Tacoma, and Hoodsport could see waves 10 feet or higher, the simulation shows. The shop was severely damaged by the Nisqually quake, which rumbled through the Puget Sound area. Reading time 6 minutes. 3.1 Numerical model for tsunami propagation and inunda-tion We use the TUNAMI-N2 model (Imamura, 1995) for modeling propagation and coastal inundation of tsunamis in Puget Sound. There are also tsunami evacuation signs on the highways. Posted on November 5, 2020 by Ear to the Ground. Puget Sound Tsunami. Earthquakes, landslides, volcanic eruptions, explosions, and the impact of meteorites, can generate tsunamis. Tsunamis can cause rapid changes in the water, including water levels and unpredictable currents, especially in harbors and entrance channels. The Hammons Preserve provides a sweeping southward view of Cultus Bay. A new tsunami model that wasn't available before. Cascadia, 1700, magnitude 9; and Puget Sound, 900, magnitude 7.5. A tsunami advisory was issued by the West Coast Tsunami Warning Center in Palmer Alaska for the West Coast of the Continental US and British Columbia did the same. In the simulation, areas that get hit hardest in Puget Sound are highlighted in red. To the west are Admiralty Inelt, Puget Sound and Possession Sound, which have kicked up tsunamis in the past. Geological history in an old salt marsh will help determine future tsunami risk in Puget Sound. Works about tsunami hazards outside of the Cascadia subduction zone .....21 IX. • The most frequent cause of Puget Sound tsunamis is landslides. They show how a large tsunami would play out in Puget Sound and how much time we have before a tsunami reaches us. These waves travel an average of 450 miles per hour in the open ocean.