5 Earthquakes Occur Off Oregon Coast, No Tsunamis Caused

5 Earthquakes Occur Off Oregon Coast, No Tsunamis Caused
Oregon Coast, Brookings Oregon Joseph Hunkins / Flickr CC BY 2.0

Five moderately impactful earthquakes occurred off the coast of Oregon overnight and on Monday, according to U.S. Geological Survey. The seismic activity did not cause any tsunamis.


According to Reuters, an earthquake of magnitude 6.0 struck off the coast of the state at around 1:11 p.m. Pacific Time. The incident followed four other earthquakes on Monday in the area – a magnitude 4.4 at about 7:45 a.m., a magnitude 5.5 at about 3:45 a.m., a magnitude 4.3 at about 1:40 a.m., and a magnitude 5.8 shortly before midnight.

According to Paul Caruso, a U.S. Geological Survey geophysicist, the series of earthquakes occurred at a depth of about six miles, which he says is not unusual in the area. Tremors were experienced throughout western Oregon and southwestern Washington.

Bob Dziak, an oceanographer with the National Oceanic and Atmospheric Administration, said that seismic activities such as these are “not uncommon,” and that they occur once every three to five years, as reported by The Oregonian.

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According to USA Today, Max Rudolph, a geologist at Portland State University, said the event occurred close to the boundary between the Juan de Fuca plate and the Pacific plate.

He said, “There is a natural ongoing movement between these two tectonic plates.

“I’m not concerned about these particular events because they were located far off shore. More than 300 miles west of Salem (Ore).”

The National Tsunami Warning Center said that the earthquakes were not strong enough to cause a tsunami. Caruso said that earthquakes of a magnitude of at least 7.0 generate tsunamis.

No calls were received from people regarding the earthquakes, according to the Lincoln County Sheriff’s office in Newport, Ore.

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