southern whidbey island fault map

Hover over a cluster of earthquakes to learn about the different types in the Pacific Northwest. Using the stratigraphic column from the Freeport quadrangle map, confirm that you can recognize . And what were looking at is water.. Fir trees near the failure are tilted and indicate rotation into the lake (to the left of the photo). In the area of North Bend, the fault zone is 4 miles wide and consists of a series of parallel faults. That could spell trouble not only for its namesake island but for south and north King County and further west. Evacuate to higher ground if you are near a large body of water. What are the most dangerous fault lines for Seattle? Johnson and others (1996) have described the southern Whidbey Island fault ( figure 1) as a broad (6 - 11 km) transpressional zone comprising three main splays, within which the local late Quaternary uplift rate is at least 0.6 mm/yr. Finding and learning about faults requires many different aspects of geology and geophysics. Share sensitive information only on official, secure websites. The largest active fault that will affect Washington (and the whole Pacific Northwest) is the Cascadia subduction zone. A drill rig left of the blockade is collecting data about the failure. Earthquake Hazards - Maps | U.S. Geological Survey The last time was 1,000 years ago between 900 and 903 A.D., said Forson. % For example, the DNR team found evidence that the rocks creating Snoqualmie Falls are much younger than previously thought. Once a fault is located, it is important to know if it is active. The spectacular falls flow over the remains of a newly discovered 20-million-year-old volcano, apparently formed atop the main part of the fault zone as magma rose upward along weak fault planes. Geologists are constantly trying to better understand the faults in our state. Because they can travel great distances, tsunamis generated from earthquakes across the ocean can still cause damage. These aftershocks can last for hours to weeks or months. This might include flammable appliances like a water heater, tall items like book cases, or heavy pictures.

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