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Necessary cookies are absolutely essential for the website to function properly. South Whidbey fault has potential for major quake We work closely with the Washington Emergency Management Division, the Washington Seismic Safety Committee, and the Federal Emergency Management Agency to ensure that the best-available science is used in the development of hazard mitigation plans. Swarm of hundreds of small earthquakes rattle Vancouver Island. Often this cracking happens because a soft part of the ground liquefies during the shaking. While the intensity of this seismic event has now decreased, a big earthquake is overdue in the region. Kelsey and others (2004 #7651) suggest that the earthquake resulted in 2.5 m uplift of the salt marsh on the north side of the fault strand relative to the marsh on the south side; no fault scarp has been identified between the marshes. Sherrods son has since completed graduate school in applied geosciences. The southern Whidbey Island fault zone (SWIF) is a mostly concealed, northwest-trending structure extending across southern Whidbey Island toward Vancouver Island (Figures 1 and 2). It will happen; we dont know when.. What makes these faults mega is that the amount of energy released is hundreds to thousands of times more than almost any other type of fault. Emergency Management Maps - Island County, Washington In fact, new faults are found every year during our geologic mapping efforts. Hover over a cluster of earthquakes to learn about the different types in the Pacific Northwest. 552 - Hood Canal fault zone (Class B) 570 - Seattle fault zone 572 - Southern Whidbey Island fault zone 575 - Saddle Mountain faults 581 - Tacoma fault zone. 4 0 obj In Washington, the risk from earthquake-induced landslides is large. Stay away from glass, windows, outside doors and walls, and anything that could fall down. These large underwater slides only occur during very large earthquakes and are one way to learn about earthquakes that happened thousands of years ago. But quiet period wont last, Strongest earthquake in 40 years rattle residents of Buffalo, NY, Is Istanbul next? Some people in places like SODO and Harbor Island may have to flee to higher floors in a building. The 1964 M9.2 Alaska earthquake created a large tsunami from the fault rupture, and many smaller tsunamis from on-land and underwater landslides. The more you know what to expect, the better prepared you will be to help yourself, your family, and others around you. South Whidbey Island Fault (SWIF) M7.4 Earthquake Scenario Fire (Vegetation Condition Class) . This northwest-trending fault comprises a broad (as wide as 6-11 km), steep, northeast-dipping zone that includes several splays with inferred strike-slip, reverse, and thrust displacement. Because Japan was so well prepared, mostretrofitted buildingsoutside of the tsunami zone survived. Seismologists estimate that such quakes and tsunami waves occur roughly every 500 years on average on the Cascadia Subduction Zone. Learn how your comment data is processed. Image from the, Aquatic Lands Habitat Restoration Program, South Lake Washington Restoration Project, Scientific and Technical Support to Aquatic Programs, Washington Geologic Survey Publications Catalog, Washington Geologic Survey Photograph Collection, Wetlands of High Conservation Value Map Viewer, Timber Sale Remaining Volume by Purchaser Reports, Spanish - Brocha, Salal y Otros Productos Forestales, Complete: Baker to Bellingham Non-Motorized Recreation Plan, Community Wildfire Resilience and Preparedness, Utility Wildland Fire Prevention Advisory Committee, Blanchard, Reiter, Walker Valley and Nearby Islands, Teanaway Community Forest Advisory Committee, Teanaway Community Forest Advisory Committee Past Meetings, Faults and Earthquakes in Washington State, Pacific Northwest Seismic Network Seismo Blog, https://buildingfailures.files.wordpress.com/2014/02/tiltedbuilding.jpg, Pacific Geoscience Center of the Natural Resources of Canada.