Earth quake update#

Because of the depth, even buildings located right above them are far enough away that seismic waves are attenuated. Intraplate or Deep Quakes occur at depths of 30-70 km in oceanic crust as it dives under lighter continental crust.An example of a crustal earthquake is the magnitude (M)6.2 Christchurch, New Zealand earthquake that occurred in 2011. Crustal earthquakes are expected on the Seattle Fault Zone, which is the primary but not only source for this type of quake in Seattle.Intense shaking occurs near the epicenter but usually diminishes quickly with distance relative to the other earthquake types.

The Seattle area experiences three earthquake types with varying consequences:o Crustal or Shallow Quakes occur in the North American plate at 0-30 km near the crust's surface along faults.Unlike other potentially catastrophic hazards, Seattle has had and will experience powerful earthquakes. Earthquakes are the most serious hazard facing Seattle.About the Seattle Office of Emergency Management.Seattle Auxiliary Communications Service (ACS).

Earth quake update#

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