MYNORTHWEST NEWS

Earthquake jolts Western Washington on Christmas Eve

Dec 24, 2023, 8:56 AM | Updated: 11:02 am

A screenshot of the MyNorthwest earthquake tracker captured in the morning of Dec. 24, 2023....

A screenshot of the MyNorthwest earthquake tracker captured in the morning of Dec. 24, 2023. (MyNorthwest image)

(MyNorthwest image)

The U.S. Geological Survey (USGS) confirmed a 4.0-magnitude earthquake hit Western Washington at 7:14 a.m. on Sunday, Christmas Eve.

The epicenter was located about four miles from Quilcene, the agency reported. The agency also noted Bremerton (23 miles away) and Victoria, British Columbia (46.4 miles), as “nearby places” to the tremor.

More information: Check out the MyNorthwest Earthquake Tracker

As of 11 a.m. Sunday morning, people felt the earthquake as far south as Olympia and as far north as Vancouver, British Columbia, according to more than 650 user responses to the USGS’ intensity map. Reports also have come in from across the Puget Sound region, including in Seattle, Tacoma, Kent, Everett and Oak Harbor.

The earthquake also had a depth of over 32 miles (about 52 kilometers), according to the USGS and the Pacific Northwest Seismic Network (PNSN).

As of 11 a.m. Sunday, the tremor had not spurred any messages or posts on X, formerly known as Twitter, from the National Oceanic and Atmospheric Administration’s U.S. Tsunami Warning System.

“It woke me and my family up,” Snohomish County resident and Bonneville Seattle employee Michael Simeona said Sunday morning.

Second Washington earthquake over 4.0 in 2023

A 4.3-magnitude earthquake struck the Puget Sound region on the evening of Oct. 8.

Seismic activity: 4.3-magnitude earthquake felt across Puget Sound region

The epicenter was located just under Marrowstone Island near Port Townsend and approximately 10 miles from Freeland in Island County. The PNSN reported the epicenter was 20 miles from Poulsbo about 23.5 miles away from Everett.

“I felt it here in downtown Seattle, sofa shaking and the water inside a bottle also moving a little bit,” one resident told KIRO 7 at the time.

Before the two earthquakes late this year, the last time Washington state had a 4.0 magnitude earthquake was in 2019 when a 4.6 earthquake hit near Monroe, The Seattle Times noted in its coverage.

According to an article published on the University of Washington’s website earlier this year, “Seattle has two primary faults: The Seattle Fault that runs east-west through the middle of the city, capable of earthquakes up to 7.4 magnitude, and the Cascadia Subduction Zone along the coast, capable of a magnitude 9 earthquake.”

The PNSN explains that the Seattle Fault — a crustal fault — runs through Seattle, under Lumen Field, west across Bainbridge Island to Hood Canal and east out past Issaquah roughly following Interstate 90.  This fault produced a large earthquake that left a geologic record of surface offsets about 1,100 years ago.

The Cascadia Subduction Zone — a “megathrust” fault — is a 620-mile long dipping fault that stretches from Northern Vancouver Island to California’s Cape Mendocino, the PNSN notes. The last known megathrust earthquake in the northwest was over 320 years ago in January 1700.

Why you didn’t get an alert about the earthquake

For those users who signed up for alerts in the past wondering why one didn’t pop up on their phones after Sunday’s earthquake, that’s because it wasn’t a big enough seismic event. The magnitude 4.0 earthquake fell under the threshold needed to trigger automated alerts.

“For some of the apps, like MyShake, which you can download on your phone, that’s still set at a magnitude 4.5 threshold and this didn’t quite meet those thresholds,” Harold Tobin of the Pacific Northwest Seismic Network told KIRO Newsradio after the magnitude 4.3 earthquake hit the region in October.

Alerts and suggestions: Public is urged to keep at least 1 emergency kit

MyShake delivers the USGS’ ShakeAlert across Washington, Oregon and California. It is operated out of the Berkeley Seismological Laboratory at the University of California Berkeley and run in partnership with the USGS and California Governor’s Office of Emergency Services (Cal OES).

Contributing: Frank Sumrall, MyNorthwest; Sam Campbell, KIRO Newsradio

MyNorthwest News

Photo: Alaska Airlines planes at Sea-Tac Airport....

Julia Dallas

Why is Sea-Tac Airport so busy right now?

Warmer weather means a busy summer travel season is ahead. Visitors may find longer than usual lines at Sea-Tac Airport and delays.

50 minutes ago

Photo: Seattle police are investigating two drive-by-shootings that happened near Alki Beach Wednes...

Julia Dallas

Seattle police investigating 2 drive-by shootings near Alki

Seattle police are investigating two drive-by-shootings that happened near Alki Beach Wednesday around 12:30 a.m.

3 hours ago

Photo: Shawna Williams, owner of Free Range Cycles, poses outside her shop on May 6, 2024, in Seatt...

Mae Anderson, The Associated Press

Bike shops boomed early in the pandemic. It’s been a bumpy ride for most ever since

For the nation's bicycle shops, the past few years have probably felt like the business version of the Tour de France, with numerous twists and turns testing their endurance.

5 hours ago

Photo: A Renton Police Department vehicle...

Julia Dallas

Renton detectives looking for group who killed man, attacked another

Renton detectives are looking for the people who shot and killed a 19-year-old and attacked another man on Saturday.

6 hours ago

Image: More than a dozen businesses in Downtown Tacoma had their windows smashed early on Saturday,...

Samantha Lomibao, KIRO 7 News

‘It’s getting worse’: More than 50 windows smashed in Tacoma’s ‘Antique Row’

More than a dozen businesses in Downtown Tacoma on Antique Road were vandalized early Saturday.

17 hours ago

Image: The Space Needle stands over the Seattle skyline on March 13, 2022 in Seattle....

Steve Coogan

Progress or problem? Seattle’s population keeps growing, but the growth has slowed

The population of Seattle grew by nearly 6,000 people from 749,134 to 755,078, or about 0.8%, between July 2022 and July 2023.

18 hours ago

Earthquake jolts Western Washington on Christmas Eve