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These are the 4 largest earthquakes that strike in or near the Willamette Valley in Oregon

These are the 4 largest earthquakes that strike in or near the Willamette Valley in Oregon

 


PORTLAND, Oregon (KOIN) – Friday’s 4.4-magnitude earthquake in Lynn County was a reminder that while rare, Willamette Valley and surrounding areas have the potential to trigger some powerful earthquakes.

Uncomfortably close to the Cascadia subduction zone that stretches across Oregon, Washington, and the northern California coast, Willamette Valley is prone to 9.0 devastating earthquakes caused by the subduction zone earthquake. Emergency officials have warned that an earthquake of this magnitude, which is believed to strike the Pacific Northwest every 190 to 1,200 years, will collapse the area’s existing infrastructure, destroying bridges, water lines and buildings.

The Lin Company earthquake was the largest to hit the valley since the 1993 “Spring Earthquake”

However, with the last event occurring in 1700, scientists were never able to record the Cascadia subduction zone event using modern tools.

Using modern equipment, Oregon State University seismologist Andrew Meggs told KOIN 6 that scientists are more prepared to record earthquakes than they were 50 years ago.

“Regional coverage of seismographs has grown from five in 1969 to more than 300 today,” Meggs said.

While the oldest USGS seismic records for Oregon date from the late 19th century, these records may not represent the complete list of regional earthquakes that occurred during this period of recorded history. However, the USGS’s earthquake catalog provides interesting insight into the state of Oregon and the seismic history of the Willamette Valley.

With that said, here are the four most powerful earthquakes ever recorded around the Willamette Valley:

McMinnville, Oregon – 5.0 m

On April 2, 1896, a 5.0-magnitude earthquake occurred near McMinnville. The US Geological Survey says it was about 6.8 miles deep.

Portland, Oregon – 5.0 m

Just four years before the McMinnville earthquake, another earthquake shook the Portland metropolitan area on February 4, 1892. It is said to have had a depth of just under 10 miles.

Bridgeton, Oregon – 5.2 m

Fast forward to the 1960s, when the earthquake struck nearly three miles east of Bridgeton, a Portland neighborhood. The US Geological Survey reported that the earthquake occurred on November 6, 1963, and was more than 9 miles deep.

Scotts Mills, Oregon – 5.6 million

The so-called 1993 spring earthquake, also known as the Scotts Mills earthquake, occurred on the morning of March 25. It was felt around the Pacific Northwest and was one of the largest earthquakes ever recorded in the Willamette Valley. region.

It was reported to be over 12 miles deep.

Sources

1/ https://Google.com/

2/ https://www.koin.com/news/environment/earthquakes/the-4-highest-magnitude-earthquakes-to-strike-around-the-willamette-valley/

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