Stay Eat Events Weather Beaches

Series of Three Small Quakes Off Oregon Coast Sunday, Monday

Published 01/29/2018 at 1:55 PM PDT - Updated 01/30/2018 at 2:35 PM PDT
By Oregon Coast Beach Connection staff

Series of Small Quakes Off Oregon Coast Sunday, Monday

(Oregon Coast) – A series of three small quakes rattled off the Oregon coast on Sunday and Monday, none of which were large enough to be felt or trigger a tsunami alert. (Graphic courtesy USGS).

All three happened about 140 miles west of Coos Bay, on the southern Oregon coast. Each was about 10 kilometers in depth, or 6.2 miles.

The first was a 4.9 magnitude which happened about 2:36 p.m. on Sunday, January 28.

The second occurred at 6:51 a.m. on Monday, January 29, recorded as a magnitude 2.9. Another of a magnitude 2.8 shook less than an hour later at 7:34 a.m.

It takes a magnitude 7.0 quake or higher to generate a tsunami.

Last week, a 7.9 earthquake in Alaska did generate a brief tsunami watch for the Oregon coast in the middle of the night, but it was canceled after about two hours.

4.9 is considerably higher than many of the 2.5 to 3.0 quakes that normally happen off the coast. The quakes all occurred near the Blanco Fracture Zone adjacent to the Cascadia Subduction Zone.

Submarine quakes in this region are quite normal and a regular part of the geological processes on the sea floor of the Oregon coast. It's all part of a network of faults called the Cascadia Subduction Zone, a 600-mile long stretch that will one day bring a much larger quake and tsunami to the area. This is an area where two plates of the Earth's crust meet and grind against each other: one carrying the continental U.S. and the other hoisting the Pacific Ocean.

You can keep up on earthquake data aroun the Northwest and the Oregon coast at Oregon, Coast Earthquake Updates - Live Data Oregon, Washington, California, Tsunamis. -- Oregon Coast Lodgings for this - Where to eat - Maps - Virtual Tours. More of the Oregon coast below:

Oregon Coast Lodging









 

More About Oregon Coast hotels, lodging.....

More About Oregon Coast Restaurants, Dining.....

 

Oregon Coast event or adventure you can't miss

 



Coastal Spotlight


LATEST Related Oregon Coast Articles

A Look at the Crazy Things Oregon Coast Sand Levels Can Do
Over the course of the year, sand levels rise and fall. Geology
Washington Coast Opens Up Six-Day Razor Clam Digs Jan. 21
Fans of clams and the Washington coast are in for a treat this week
Oregon Coast Passes Snow Advisories; Frost, Wind Warning on South Coast
A winter weather advisory for the coast range pass highways and the southern Oregon coast has a frost advisory and a high wind warning
Getting the Message to Oregon Coast Storm Watchers: Why It's Not Working
The disregard for beach safety messages on the Oregon coast was gut wrenching and frustrating. South Coast, Washington coast
Some Snow, Winter Advisories for Portland, S. Washington, Oregon Coast Range
The higher elevations of the Oregon Coast Range are already seeing about an inch of accumulation. South coast
Oregon Coast Road Work, Delays at Astoria, Cannon Beach
Road and bridge work on the north Oregon coast will be causing some delays for residents and travelers
Oregon Coast Storm Roundup: Wild Videos, Waves Turn Deadly
Saturday's storm action produced some astounding video and images, but it also proved deadly for one group. South coast
New Surf Warnings for Oregon Coast; What's Closed Down, Video
28 to 35-ft waves breaking onshore, some beach closures

Back to Oregon Coast

Contact Advertise on BeachConnection.net
All Content, unless otherwise attributed, copyright BeachConnection.net Unauthorized use or publication is not permitted

Oregon Coast Lodging
Rentals
Specials

Dining

Events Calendar

Oregon Coast Weather

Travel News

Search for Oregon Coast Subjects, Articles

Virtual Tours, Maps
Deep Details