Just one week to go until the Great Washington ShakeOut earthquake drill! We're getting ready to Drop, Cover, and Hold On with Dubs at 10:15 AM on October 15. Learn more and sign up to join us at www.shakeout.org/washington/

Happy #FieldworkFriday! Satellite comms, like the Starlink at PASS, lets us reliably transmit data where cell coverage is poor. But satellite dishes are power hogs, so we often use a short radio hop from a solar-powered seismic site to an AC-powered site with a satellite dish.

Wild to see a video of fish reacting to the earthquake yesterday! Thanks @ptdefiancezoo.bsky.social! How did YOU react? Did you Drop, Cover, and Hold On?

Point Defiance Zoo & Aquarium@ptdefiancezoo.bsky.social · last wk.

A little unexpected shake-up in Tacoma today! During today’s 4.2 magnitude earthquake, some of our aquarium animals were briefly startled, but everyone is safe and doing well. Most guests and staff didn’t feel the earthquake at all.

A M4.2 earthquake occurred this afternoon on the Kitsap Peninsula. Earthquakes of this size are a normal part of seismicity in the Puget Sound region, and we’re monitoring the area for any additional activity. For more information visit the PNSN event page: pnsn.org/event/714111...

Yes, that was an earthquake on the Kitsap Peninsula! If you are in the area, you can contribute to citizen science by filling out a report here: zpr.io/UA6upKKXB4C3 to tell us if you felt the shaking or not.

Pacific Northwest Seismic Network@pnsn1.bsky.social · last wk.

PRELIM Earthquake: Magnitude 4.3, 18.9 km SSW from Bremerton, WA at 2026/09/29 14:05 PDT Learn more: pnsn.org/event/714111952 Did You Feel It? Submit a report: zpr.io/UA6upKKXB4C3

PRELIM Earthquake: Magnitude 4.3, 18.9 km SSW from Bremerton, WA at 2026/09/29 14:05 PDT Learn more: pnsn.org/event/714111952 Did You Feel It? Submit a report: zpr.io/UA6upKKXB4C3

Happy #FieldworkFriday! The highest-elevation station in the continental US, St Andrews Rock (STAR) on Mt Rainier, sits above 11,000ft. Steep terrain, erosion, and changing snow & ice are forcing a move down ridge. This visit helped identify a safer, more stable site nearby.

Happy #FieldworkFriday! Our field crew headed to Mt. Rainier to perform maintenance at RCS, one of our seismic stations. Along the way, they enjoyed stunning views of the snow-covered peaks.

bsky.app/profile/did:... UPDATE: Magnitude 3.8, 59.4 km SSE from Tofino, BC, 4.98km deep at 2026/09/15 02:30 PDT V4 Learn more: pnsn.org/event/714102491 Did You Feel It? Submit a report: zpr.io/iQUYDiFP2M7p

bsky.app/profile/did:... UPDATE: Magnitude 3.8, 59.4 km SSE from Tofino, BC, 4.98km deep at 2026/09/15 02:30 PDT V4 Learn more: pnsn.org/event/714102491 Did You Feel It? Submit a report: zpr.io/iQUYDiFP2M7p

PRELIM Earthquake: Magnitude 3.1, 47.6 km SE from Tofino, BC at 2026/09/15 02:30 PDT Learn more: pnsn.org/event/714102491 Did You Feel It? Submit a report: zpr.io/iQUYDiFP2M7p

PRELIM Earthquake: Magnitude 3.1, 47.6 km SE from Tofino, BC at 2026/09/15 02:30 PDT Learn more: pnsn.org/event/714102491 Did You Feel It? Submit a report: zpr.io/iQUYDiFP2M7p

Happy #FieldworkFriday! Members of the PNSN field team recently visited Quillayute airport on the Olympic Peninsula to upgrade telemetry equipment and infrastructure. PNSN’s data telemetry system transmits ground-motion data from hundreds of seismic stations to UW 24/7.

PNSN detected 313 earthquakes in Washington and Oregon last month! The largest was a M3.1 near Yakima, WA on August 11. This is a normal level of seismic activity. View the full Monthly Seismicity Report for August 2026 here: pnsn.org/events/summa...

Did you feel this morning's earthquake east of Kelso and Castle Rock? Fill out this form: zpr.io/GYsA5SkQWShi to let us know! PNSN seismologists updated the magnitude to a 3.7: pnsn.org/event/714095...

Pacific Northwest Seismic Network@pnsn1.bsky.social · last mo.

PRELIM Earthquake: Magnitude 3.8, 26.1 km ENE from Longview, WA at 2026/09/05 04:09 PDT Learn more: pnsn.org/event/714095342 Did You Feel It? Submit a report: zpr.io/GYsA5SkQWShi

PRELIM Earthquake: Magnitude 3.8, 26.1 km ENE from Longview, WA at 2026/09/05 04:09 PDT Learn more: pnsn.org/event/714095342 Did You Feel It? Submit a report: zpr.io/GYsA5SkQWShi

PRELIM Earthquake: Magnitude 3.3, 91.2 km WSW from Newport, OR at 2026/09/04 20:08 PDT Learn more: pnsn.org/event/714095252 Did You Feel It? Submit a report: zpr.io/Gm2AmcfreVVJ

Happy #FieldworkFriday! A PNSN field crew headed to the Saddle Mountains in eastern Washington this week to test radio equipment and scope out sites for future seismic stations—and made a detour to admire some lava that hit water 16 million years ago and froze into layered blobs.

Happy #FieldworkFriday! A PNSN field crew went out to check on YA2 & WA2, two seismic stations affected by recent wildfires. YA2's old equipment burned, but the newer metal swingset at WA2 survived the flames in good working condition. Also, burnt sagebrush can be hard on tires!

PRELIM Earthquake: Magnitude 3.2, 19.3 km ESE from Penticton, BC at 2026/08/18 23:17 PDT Learn more: pnsn.org/event/714082101 Did You Feel It? Submit a report: zpr.io/m6qPeHtvhue6

PNSN's Nate Stevens was featured in SSA's At Work column this week!

Seismological Society of America@seismosocam.bsky.social · 2mo ago

Learn more about @pnsn1.bsky.social @ntstevens.bsky.social Nate Stevens' #cryoseismology research from Antarctica to Oregon in this month's SSA At Work! buff.ly/SH4Nhtw ⚒️

Are you in Seattle? Come out to Obec in Ballard this evening to hear PNSN's Dr. Mouse Reusch talk all about our local earthquake hazards!

PNSN Director Harold Tobin explains what a new state report on tsunami risk from Alaska earthquakes means for Washington and what residents can expect. www.king5.com/video/weathe...

Our colleagues at the Cascades Volcano Observatory captured the arrival of a bolide (large meteor) over western WA on their infrasound instruments! Check out the post from USGS Volcanoes here: www.facebook.com/share/p/19Bb...

Happy #FieldworkFriday! PNSN field crews recently encountered a friendly deer and friendlier squirrel at #ShakeAlert-contributing seismic stations EGRN on the Evergreen College campus and FMW on Mt. Fremont—but kept their distance from this black bear & her cubs on the mountain.

NEW Release from us and @wadnr.bsky.social: Statewide tsunami modeling for a tsunami originating from Alaska is now available. Learn the details here: washingtonstategeology.wordpress.com

PNSN director Harold Tobin spoke to NPR about the underlying seismology and other factors that affected the impacts of the recent earthquakes in Colombia and Venezuela.

Harold Tobin@haroldtobin.bsky.social · 2mo ago

I did an interview for NPR News today, in good company with Bill Barnhart of USGS: one.npr.org/i/nx-s1-5929...

PNSN’s Harold Tobin explains this week’s devastating M7.4 earthquake in Colombia—and the parallels to earthquake hazards in the Pacific Northwest. Learn about subduction zones, slab earthquakes, and why big earthquakes are not happening more frequently than usual: www.youtube.com/watch?v=5PI5...

Colombia M7.4 Earthquake and Lessons for the Pacific Northwest

YouTube video by Pacific Northwest Seismic Network (PNSN)

youtube.com

Come out to Obec Brewing in Ballard next week to learn about earthquake hazards in Seattle and how scientists like PNSN's Mouse Reusch monitor seismic activity in the region!

Stand Up for Science Washington@sufswa.bsky.social · 2mo ago

August Beer Reviewed Science (BRS) will be one week early this month...August 18th. Same time though. We'll be continuing our Summer of Disaster series with EARTHQUAKES...how do they happen, how it effects you.

Were you in the Yakima area during this morning's small earthquake? Please complete the short Did You Feel It? survey here: zpr.io/5dgDuFgRVkM5 Your contributions to citizen science help us learn about shaking intensity and other earthquake effects!

Pacific Northwest Seismic Network@pnsn1.bsky.social · 2mo ago

PRELIM Earthquake: M3.2, 23.2 km SSW from Yakima, WA at 2026/08/11 09:23 PDT http://www.pnsn.org/event/714075502 Did You Feel It?: https://zpr.io/5dgDuFgRVkM5