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Pacific Northwest Seismic Network @pnsn1.bsky.social · 02/10/2026

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.

Wide outdoor rural scene under bright blue sky with large white clouds.

Foreground left: side of small white shed. Beside it stands weather-monitoring equipment mounted on wooden posts: metal sensor box, cables, a tall pole, and rectangular solar panel at top.

Center: small leafy fruit tree in grassy field. Beyond it stretches open pasture, enclosed by thin wire fencing and wooden fence posts.

Background: dense evergreen trees line field. Low forested hills rise at far right. Sunlight casts long shadows across grass. Photo feels clear, peaceful, and outdoorsy.

Wide outdoor pasture under cloudy sky.

Left: person wearing cap, plaid shirt, jeans, standing in grass and looking toward equipment.

Center: Underground Depart box with the seismic sensors

Right: solar-powered monitoring station mounted on stone-and-wood base. Two solar panels angle upward. Below them are weather sensors, pipes, wires, and small instruments.

Open metal electrical control box mounted outdoors. Inside, many red, black, blue, green, and gray wires run between terminal blocks, connectors, power supplies, and other electrical components. Wires are bundled and coiled near top and right side. A horizontal grounding bar with several black cable clamps crosses middle. Bottom section contains additional terminal blocks and a larger gray control module. Sunlight creates a rainbow-like glare across image. Wooden support posts and outdoor grass visible around box.

Tall metal pole stands beside wooden post, with rectangular solar panel mounted at top. Coiled conduit and electrical wiring run along pole, with small round instrument attached near middle. Aluminum ladder leans against structure in foreground. Beyond it, sunny pasture, rustic fence, evergreen forest, and wooded hills sit beneath bright blue sky with scattered white clouds.

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Reposted by Pacific Northwest Seismic Network

Washington Emergency Management Division @emd.wa.gov · 30/09/2026

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?

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Pacific Northwest Seismic Network @pnsn1.bsky.social · 29/09/2026

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...

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Pacific Northwest Seismic Network @pnsn1.bsky.social · 29/09/2026

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.

zpr.io

The Earthquake Event Page application supports most recent browsers, view supported browsers. Or, try our Real-time Notifications, Feeds, and Web Services.

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Pacific Northwest Seismic Network @pnsn1.bsky.social · 29/09/2026

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

Map with a star marker for the magnitude 4.267 earthquake located 18.9 km SSW from Bremerton, WA

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Pacific Northwest Seismic Network @pnsn1.bsky.social · 25/09/2026

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.

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Pacific Northwest Seismic Network @pnsn1.bsky.social · 18/09/2026

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.

A rugged, snow-dusted mountain ridge rises beneath a deep blue sky. There is also station sits along the rocky slope over looked by clear blue sky.

photo of Field crew posing with a thumbs up

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Pacific Northwest Seismic Network @pnsn1.bsky.social · 15/09/2026

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

Map with a star marker for the magnitude 3.81 earthquake located 59.4 km SSE from Tofino, BC

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Pacific Northwest Seismic Network @pnsn1.bsky.social · 15/09/2026

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Pacific Northwest Seismic Network @pnsn1.bsky.social · 15/09/2026

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

Map with a star marker for the magnitude 3.097 earthquake located 47.6 km SE from Tofino, BC

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Pacific Northwest Seismic Network @pnsn1.bsky.social · 15/09/2026

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

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Pacific Northwest Seismic Network @pnsn1.bsky.social · 12/09/2026

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.

Photo of three field crew members standing on green excavator

Photo of solar panel sitting on freshly cut grass overlooked by cloudy blue sky

photo of a field crew team member standing on ladder besides a mobile white cargo container which has been converted into a mini station

A University of Washington flag flies from tall pole beneath a red, white, and blue illuminated beacon at dusk. In the background there is the white cargo container a small blue field station. The overcast sky and rural landscape create a dark, atmospheric setting.

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Pacific Northwest Seismic Network @pnsn1.bsky.social · 11/09/2026

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...

A graphic titled August 2026 Earthquake Recap showing a map of WA and OR with dots of differing sizes indicating the earthquakes and the text "We detected 313 earthquakes. The largest magnitude was a 3.1. There were 2 felt events reported." to the side.

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Pacific Northwest Seismic Network @pnsn1.bsky.social · 05/09/2026

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...

zpr.io

The Earthquake Event Page application supports most recent browsers, view supported browsers. Or, try our Real-time Notifications, Feeds, and Web Services.

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Pacific Northwest Seismic Network @pnsn1.bsky.social · 05/09/2026

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

Map with a star marker for the magnitude 3.826 earthquake located 26.1 km ENE from Longview, WA

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Pacific Northwest Seismic Network @pnsn1.bsky.social · 05/09/2026

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

Map with a star marker for the magnitude 3.268 earthquake located 91.2 km WSW from Newport, OR

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Pacific Northwest Seismic Network @pnsn1.bsky.social · 28/08/2026

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.

Radio tower on a mountain ridge covered in yellow grass and basalt, framed by barbed wire in the foreground.

A person crouched with a laptop and some wires by a small antenna and some basalt boulders, with the slopes below.

Another angle of the person working with the laptop and antenna, showing a white truck and two transmission towers along the ridge line in the background

A person peering at a striking rock formation with blobs and layers of dark basaltic lava.

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Pacific Northwest Seismic Network @pnsn1.bsky.social · 21/08/2026

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!

Charred hillside after a wildfire, with our YA2 seismic equipment fallen on its side laying on the scorched earth

Photo of a fallen tree in front of our WA2 seismic station, surrounded by dry, sparsely vegetated plain beneath wide, clear blue sky, conveying an arid, deserted landscape.

This is our WA2 seismic station being serviced by a field technician.

Photo of field crew beside a white SUV on a barren desert road, removing a rear wheel while the hatch is open showing a spare tire and tool boxes.

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Pacific Northwest Seismic Network @pnsn1.bsky.social · 19/08/2026

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

Map with a star marker for the magnitude 3.159 earthquake located 19.3 km ESE from Penticton, BC

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Pacific Northwest Seismic Network @pnsn1.bsky.social · 18/08/2026

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

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Pacific Northwest Seismic Network @pnsn1.bsky.social · 18/08/2026

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!

Flyer for Beer Reviewed Science talk by Dr. Mouse Reusch on the topic "Earthquakes and shaking and faults, oh my! Seismic Activity in the Emerald City" at Obec Brewing, 1144 NW 52nd St, 6:30-8:30 PM, August 18.

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Pacific Northwest Seismic Network @pnsn1.bsky.social · 17/08/2026

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...

king5.com

https://www.king5.com/video/weather/earthquakes/expert-says-new-tsunami-report-isnt-a-reason-to-panic-its-a-reason-to-prepare/281-7f9e3ea3-6b62-4257-96b7-34a8b7a7b02e

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Pacific Northwest Seismic Network @pnsn1.bsky.social · 14/08/2026

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...

Graphic showing waveforms of bolide recording on infrasound instruments at Glacier Peak, Mount Rainier, Mount Adams, Mount St Helens, and Mount Hood

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Pacific Northwest Seismic Network @pnsn1.bsky.social · 14/08/2026

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.

Young deer with small antlers standing alert among dense ferns and underbrush in a shaded forest, peering toward the camera.

Curious small brown squirrel standing on its hind legs and reaching toward the camera, whiskers and bright eyes focused on the lens against a sunlit rocky background.

Small squirrel standing on its hind legs on a sunlit rock, eyes half-closed with front paws raised as if begging or sniffing the air.

Three black bears spread across a steep, ridged alpine slope, foraging among grassy strips and rocky bands below a conifer tree line.

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Reposted by Pacific Northwest Seismic Network

Washington Emergency Management Division @emd.wa.gov · 13/08/2026

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

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Pacific Northwest Seismic Network @pnsn1.bsky.social · 13/08/2026

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.

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Pacific Northwest Seismic Network @pnsn1.bsky.social · 13/08/2026

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...

youtube.com

Colombia M7.4 Earthquake and Lessons for the Pacific Northwest

YouTube video by Pacific Northwest Seismic Network (PNSN)

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Pacific Northwest Seismic Network @pnsn1.bsky.social · 12/08/2026

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!

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Pacific Northwest Seismic Network @pnsn1.bsky.social · 11/08/2026

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!

zpr.io

The Earthquake Event Page application supports most recent browsers, view supported browsers. Or, try our Real-time Notifications, Feeds, and Web Services.

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Pacific Northwest Seismic Network @pnsn1.bsky.social · 11/08/2026

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

Map with a star marker for the magnitude 3.245 earthquake located 23.2 km SSW from Yakima, WA

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Reposted by Pacific Northwest Seismic Network

Dr. Wendy Bohon @drwendyrocks.bsky.social · 10/08/2026

Preliminary information about the M7.4 earthquake in Colombia

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Pacific Northwest Seismic Network @pnsn1.bsky.social · 07/08/2026

Happy #FieldworkFriday! This week PNSN's field team conducted maintenance at seismic station REDMT on Red Mountain, where smoke from the wildfires in WA and OR filled the horizon. Though the fires have not impacted our network this year, our thoughts are with everyone affected.

Solar panel attached to an antenna tower on top of a mountain

Solar panel and antenna tower sitting on top a hill surrounded by forest hills and mountains

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Pacific Northwest Seismic Network @pnsn1.bsky.social · 06/08/2026

PNSN detected 292 earthquakes in Washington and Oregon last month! The largest was a M3.8 near Oak Harbor, WA on July 1. This is a normal level of seismic activity. View the full Monthly Seismicity Report for July 2026 here for more details: pnsn.org/events/summa...

Graphic titled "July 2026 Earthquake Recap" showing a map of WA and OR with dots of different sizes representing the location and magnitude of earthquakes. It reads "We detected 292 earthquakes. The largest magnitude was a 3.8. There was 1 felt event reported."

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Pacific Northwest Seismic Network @pnsn1.bsky.social · 31/07/2026

Happy #FieldworkFriday! We retrieved our trail cam from Emerald Ridge (RER) last week which took daily photos from September 2023 to January 2025. This insight shows that our extended solar panel plays a vital role, at times being the only thing above the deep snow.

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Pacific Northwest Seismic Network @pnsn1.bsky.social · 28/07/2026

PNSN’s stations monitor seismic activity in our region, but they also capture signals from earthquakes all around the world. Seismic waves from today’s M6.8 earthquake in Kumamoto, Japan traveled over 5000 miles to our network in WA and OR, arriving just over ten minutes later.

Map showing nine seismic stations across WA and OR with an arrow coming from the west, captioned "Seismic waves from Japan ~8500 km away"

Graphic showing waveforms of the seismic activity recorded at those nine stations, with P, S, and surface waves identified by arrows.

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Reposted by Pacific Northwest Seismic Network

Dr. Judith Hubbard @judithgeology.bsky.social · 28/07/2026

⚒️ 🧪 A M6.8 earthquake struck Kyushu, Japan today. Large quakes in Japan are common and often pass without much notice, but this one is serious - instead of occurring offshore in the subduction zone, it is a shallow, strike-slip event near Kumamoto. Damage and deaths have already been reported.

earthquakeinsights.substack.com

Southern Japan struck by deadly M6.8 earthquake

A reminder of the neighboring 2016 Kumamoto M7.0 earthquake

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Pacific Northwest Seismic Network @pnsn1.bsky.social · 25/07/2026

We’re here in Cal Anderson Park sharing information about earthquake hazards and ShakeAlert earthquake early warning at the 2026 Seattle Disaster Relief Trials, a cargo bike competition and exercise showing how micromobility can contribute to community disaster response.

Two people in PNSN gear at a table with earthquake information resources

A group of people with bikes gathered in Cal Anderson Park

People working on bikes by a sign that says Disaster Relief Trials

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Pacific Northwest Seismic Network @pnsn1.bsky.social · 24/07/2026

Happy #FieldworkFriday! Love hiking? Come along with us as we trek to RER, a seismic station at Emerald Ridge on Mount Rainier, and see where fieldwork takes us.

Cloudy sky overlooking a carpet of thousands of dark green trees covering the mountain

Sensor with solar panels sitting on a grassy hilltop overlooked by bright blue sky with the snowing and rocky mountain in the background

Fieldwork team set up a white tent on grassy field as the sun is slowly coming down

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Reposted by Pacific Northwest Seismic Network

UW College of the Environment @uwenvironment.bsky.social · 24/07/2026

With 569 seismic monitoring stations across WA and OR, the ShakeAlert earthquake warning system installations are now complete! Researchers at @pnsn1.bsky.social are exploring how to expand the system to better detect offshore earthquakes. bit.ly/4wNMbre 📷: University of Washington

A seismic monitoring station installed in August 2025 atop Burley Mountain in the Gifford Pinchot National Forest

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Reposted by Pacific Northwest Seismic Network

Washington Emergency Management Division @emd.wa.gov · 20/07/2026

Our Newest cryptid has really been shaking things up here in Washington. ...What can Jimothy teach us about #earthquake safety?

Image showing Jimothy, a raccoon with a short body demonstrating "Drop, Cover, and Hold On" in an infographic. Drop: Get low to the ground, right where you are. Staying Low keeps you stable. Cover: Cover your head and neck (if you have one). Take Cover under something sturdy if nearby, like a sturdy table (or your neighbor's earthquake-retrofitted porch). Hold On: "Hold On, little buddy! Hang onto your cover until the shaking stops."

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Pacific Northwest Seismic Network @pnsn1.bsky.social · 17/07/2026

Happy #FieldworkFriday! PNSN field crew recently took a helicopter ride to upgrade equipment at seismic station OSD (Snow Dome) on Mount Olympus in Olympic National Park. Ride along to check out the views!

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Reposted by Pacific Northwest Seismic Network

CRESCENT @cascadiaeqs.bsky.social · 17/07/2026

Presentation recordings, slide decks and other resources from CRESCENT's recent Partnerships & Applications Workshop are now available at: ow.ly/tvxs50ZoZvh

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Reposted by Pacific Northwest Seismic Network

EarthScope Consortium @earthscope.org · 17/07/2026

A M7.3 earthquake struck offshore near the border of Mexico and Guatemala. Offshore southern Mexico and Central America, the Cocos Plate subducts beneath the North American and Caribbean plates, resulting in frequent large earthquakes. Learn more & access event data ➡️ loom.ly/qBQlsMY

Map of southern Mexico and Central America showing earthquake depths along the Cocos Plate subduction zone. A white star marks the July 17 magnitude 7.3 earthquake offshore of southern Mexico.

Map of southern Mexico and Central America showing GPS station motion relative to the North American Plate. White arrows indicate crustal movement, and a red star marks the July 17 magnitude 7.3 earthquake offshore of southern Mexico.

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Reposted by Pacific Northwest Seismic Network

Dr. Wendy Bohon @drwendyrocks.bsky.social · 17/07/2026

Shallow magnitude 7.3 earthquake 48 km SW of Aquiles Serdán, Mexico earthquake.usgs.gov/earthquakes/...

Star shows the location of the earthquake just offshore of Mexico near the border with Guatemala

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Pacific Northwest Seismic Network @pnsn1.bsky.social · 17/07/2026

PNSN staff & our USGS Seattle colleagues are in Portland for the second time in a month! We came in June for a @cascadiaeqs.bsky.social workshop on earthquake/tsunami scenarios; now we're at the 13th National Conference on Earthquake Engineering connecting earthquake science & engineering practice.

A group of people wearing lanyards gathered outdoors some steps on the UO Portland campus.

A group of people wearing lanyards gathered in the Oregon Convention Center.

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Reposted by Pacific Northwest Seismic Network

CRESCENT @cascadiaeqs.bsky.social · 13/07/2026

We are excited to announce the publication of two foundational articles on CRESCENT in Seismological Research Letters! cascadiaquakes.org/2026/07/10/cresc…

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Pacific Northwest Seismic Network @pnsn1.bsky.social · 10/07/2026

Happy #FieldworkFriday! After wrapping up work at station BOW2, our field team spottted two young fawns nearby. Were they curious future field assistants, or just taking a quick break from playing tag with each other?

Solar panal sitting on grass under nice blue sky

Two solar panels sitting on top of grassy hill under cloudy sky

Solar panel facing towards the cloudy sky

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Pacific Northwest Seismic Network @pnsn1.bsky.social · 08/07/2026

7 seismometers, 6 soccer matches, and 21 goals! Here's how the seismograms for every World Cup goal scored at Seattle Stadium stack up. Read the Seattle Times story for more about PNSN's sports seismology (and the real earthquake kind): www.seattletimes.com/seattle-news...

Graphic showing seismogram recordings for all 21 goals scored at Seattle stadium.

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Pacific Northwest Seismic Network @pnsn1.bsky.social · 08/07/2026

UW student journalists at The Daily covered PNSN's experiments with World Cup seismology as tool for public outreach and science education—read the article here: www.dailyuw.com/article/seis...

dailyuw.com

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