Magnitude 4.5 Earthquake On US West Coast

Bridget Mulroy
Magnitude 4.5 Earthquake On US West CoastPhoto by(@GarysFRP/iStock)

A magnitude 4.5 earthquake struck in the Pacific along the west coast of Oregon. An earthquake with a magnitude of 4.5 is considered to be moderate. This quake was powerful enough to alert local tsunami warning systems. No official tsunami warning was issued since no tsunami tendencies were detected after the earthquake hit.

Yesterday’s earthquake was one of the most powerful the region has seen in quite some time. Oregon’s portion of the Cascadia Subduction Zone is highly active and has been known to have magnitude 8 - 9 earthquakes which typically occur every 500 years. The last one took place in January of 1700.

The earthquake mentioned here has been documented by USGS, and detailed below. UTC is an abbreviation for Coordinated Universal Time.

Magnitude 4.5 Earthquake Struck Off the Coast of Oregon: On 24 August 2023 at 11:18 PM UTC, a magnitude 4.5 earthquake struck in the Pacific off of Oregon’s coast at a depth of 10 km.

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Hi, I’m Bridget. I’m based in Red Bank, New Jersey, Calabasas, California, & Manhattan, New York. I cover geology, seismology, botany, biology, & community news. USGS Verified ✅

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