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The Seattle Fault is the structural boundary where 50–60 million years old (early Tertiary) basalt of the Crescent Formation on the south has been uplifted – the Seattle Uplift – and is tipping into the Seattle Basin, where the Tertiary bedrock is buried under at least 7 km (4.3 miles) of relatively softer, lighter sedimentary strata of ...
Damaging earthquakes are well known in the Pacific Northwest, including several larger than magnitude 7, most notably the M9 1700 Cascadia earthquake and the M7.0–7.3 earthquake in about 900AD on the Seattle Fault. The M6.5 1965 Puget Sound earthquake shook the Seattle, Washington, area, causing substantial damage and seven deaths. This event ...
One study of seismic vulnerability of bridges in the Seattle – Tacoma area [4] estimated that an M 7 earthquake on the Seattle or Tacoma faults would cause nearly as much damage as a M 9 subduction earthquake. Because the Seattle and Tacoma faults run directly under the biggest concentration of population and development in the region, more ...
Here's what to know about earthquake activity and what causes the phenomenon. ... making it harder to study the area. While East Coast earthquakes are less ... A 4.0 magnitude quake could be felt ...
The quake, which had a center near Ferrelview and the Kansas City International Airport, was reported around 1:45 p.m. March 15. Magnitude 3.5 earthquake near KCI was caused by mine collapse: USGS ...
This is a list of earthquakes in Washington, a U.S. state. Date Location MMI Mag. Deaths Injuries Total damage / notes; 2001-02-28: Puget Sound: VIII:
Scientists knew it wasn’t an earthquake, so they labeled the event a USO (unidentified seismic object) and began searching for a cause. The investigation (involving 68 scientists, 40 ...
Geologists use seismites, in combination with other evidence, to better understand the earthquake history of an area. If age and distribution of seismically-generated features can be determined, then recurrence interval and seismic hazard risk can be assessed. [17] [18] [19] [20]