PNSN
@PNSN1
17h
PNSN detected 292 earthquakes in Washington and Oregon last month! The largest was a M3.1 near Forks, WA on October 16. This is a normal level of seismic activity. View the full Monthly Seismicity Report for October 2026 here: pnsn.org/events/summary…
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PNSN retweeted
Seattle OEM
@OEMSeattle
21h
Today is #WorldTsunamiDay
What a great day to be prepared.
Tsunamis are rare but possible on all 3,000 miles of shoreline in Washington so it is better to be prepared than caught unaware.
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PNSN retweeted
WA Emergency Management
@waEMD
23h
Today is World #TsunamiDay! You are the first on scene for your community when disaster strikes. Is your community ready to respond after a major earthquake & tsunami?

Learn more:
☑️mil.wa.gov/neighborhoods ☑️mil.wa.gov/cert

#ResilienceStartsWithYou
A white and blue graphic with a picture of community volunteers wearing green vests and hard hats. The heading reads you are the first on scene for your community when disaster strikes. A bulleted list follows that says get to know the people in your community, join or start a local community emergency response team (CERT), and check on your neighbors after a disaster. At the bottom is a logo for World Tsunami Awareness Day.
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PNSN retweeted
Washington State Dept. of Natural Resources
@waDNR
19h
Today is Tsunami Awareness Day. Tsunamis happen in Washington. Now you are aware.
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PNSN retweeted
USGS ShakeAlert
@USGS_ShakeAlert
Oct 30
Are you ready for the shakes, bumps, and creaks in the night? (or anytime?)
ShakeAlert has 3 Halloween treats for everyone!

There are 3 ways to get ShakeAlert EEW alerts on your phone so everyone can be prepared - and never scared.

Access your goodie bag here:
k

@UOHazardsLab @OregonOEM @waDNR @PNSN1 @Cal_OES @CaltechSeismo @FEMARegion10 @FEMARegion9 @npdcoalition @ListosCA @ReadyLA @ReadyLACounty @SF_emergency @USGS_Quakes

🎥 ShakeAlert is the treat that keeps on giving!
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PNSN
@PNSN1
Oct 30
Happy #FieldworkFriday and Happy Halloween! Since it’s spooky season, here are PNSN seismic stations MOON🌙 & OWLS🦉 and repeater sites WOLF🐺 & PUNKIN🎃. They help monitor the tricks of our regional seismic hazards and treat you with @USGS_ShakeAlert's earthquake early warning!
Picture of the MOON station from 2018. Blue sky with clouds in the background. Station consists of a red box hooked up to a pole-mounted solar panel and communications antenna.Picture of the OWLS station. Gray sky, a clearing of trees, and two large wooden poles in the background. Station is a gray metal box sitting on the grass.
Picture of the repeater site WOLF. A man on a ladder helps attach a device above the door to a blue and white building.Picture of the repeater site PUNKIN. Blue sky with a hill and trees in the background. Blue and orange building with a grassy lawn in front.
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PNSN
@PNSN1
Oct 23
Happy #FieldWorkFriday! When rain washed out the main trail, our Field team and volunteers put their adventure skills to work, finding a new route to our MBW2 station. Once there, they installed a new router, proving that no muddy path can stop this team!#shakealert
Solar panels and a tall monitoring mast in a sunlit alpine clearing surrounded by dense evergreen trees, set up to provide off-grid power and collect environmental data.volunteer sitting and writing beside a brown field equipment shelter fitted with a tilted solar panel, set in a colorful alpine meadow with dense evergreen forest and snow‑capped peaks under a clear blue sky.
PNSN Volunteer with a green cap and light-blue jacket pauses on an alpine trail holding trekking poles amid evergreen trees and autumn shrubs, with a snow-capped mountain peak visible through the forest.Alpine meadow and dense evergreen forest leading to a snow-dusted rocky mountain peak under a clear blue sky, with a small stacked stone cairn visible in the sunlit foreground.
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PNSN
@PNSN1
Oct 22
Earthquake: Magnitude 3.0, 17.9 mi SSE from Longview, WA, 26.72 mi NNW from Portland, OR at 2026/10/22 07:25:19 AM PDT
Learn more: pnsn.org/event/714124012
Did You Feel It? Submit a report: earthquake.usgs.gov/earthquakes/ev…
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PNSN
@PNSN1
Oct 17
PRELIM Earthquake: Magnitude 3.3, 19.3 km E from Forks, WA at 2026/10/16 20:37 PDT
Learn more: pnsn.org/event/714121212
Did You Feel It? Submit a report: zpr.io/Cyy8xyqC9Ybh
Map with a star marker for the magnitude 3.27 earthquake located 19.3 km E from Forks, WA
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PNSN
@PNSN1
Oct 16
Happy #FieldworkFriday! Our field crew just finished up with routine maintenance at one of our stations, FMW. Check out the video to see how the station works and the sights of Mount Fremont
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PNSN retweeted
USGS ShakeAlert
@USGS_ShakeAlert
Oct 15
The Great ShakeOut is only once a year, but you can be ShakeAlert Ready *all* year.

Do you have all three? Maximize your earthquake safety. They’re all free 🆓!

Learn more susgs.gov/FAQ/BeShakeAle…

@ShakeOut @ECA @PNSN1 @UOHazardsLab @Cal_OES @CAGeoSurvey @ListosCA @USGS_Quakes ncy @FEMARegion10 @ReadyLA @USGS

📷Three ways to be safe with ShakeAlert EEW for your phone.
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PNSN retweeted
WA Emergency Management
@waEMD
Oct 15
Replying to @waEMD
At about 10:15 a.m., more than 120 Washington tsunami sirens along the inner and outer coast will be tested using the real wailing sound of a tsunami warning. DO NOT CALL 911. EAS will sound on radio & TV.

Wireless Emergency Alert text system on cell phones will NOT be tested.
Headline says: “GREAT WASHINGTON SHAKEOUT ALERT TESTS.” WHAT ALERTS COULD I GET ON 10/15? You may get an alert, If you have downloaded the MyShake app, on Broadcast TV and radio, NOAA weather radio, Tsunami sirens, Tri-Cities outdoor warning sirens. You will not get an alert from on your phone frm earthquake early warning sources, wireless emergency alerts, no alerts from Streaming TV and radio, satellite radio, no alerts from Pierce County lahar sirens. Your city, county, and/or tribal government may also test their local emergency alert systems as part of the Great Washington ShakeOut. Check with them directly to confirm if you will receive an alert on 10/15. Emergency alerts are tested as part of the Great Washington ShakeOut to ensure the systems are working and to help the public be familiar with the kinds of alerts they may receive in a real emergency. If you receive one of these alerts on 10/15, take this opportunity to take the protective actions you would in a real emergency.
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PNSN
@PNSN1
Oct 15
ONE HOUR until the Great ShakeOut! At 10:15 AM, join millions of people across Washington and Oregon to practice our Drop, Cover, and Hold On in the world's largest earthquake drill.
A group of people in PNSN shirts and UW mascot Dubs (a Husky) dropping and covering in a beautiful stone library buildingA graphic showing Drop, Cover, and Hold On with logos for the Great Washington ShakeOut, UW Emergency Management, and PNSN
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PNSN retweeted
OregonOEM
@OregonOEM
Oct 13
🌎🚨 Oregon, are you ready to SHAKE OUT?

📅 Thursday, October 15, 2026
⏰ 10:15 a.m. (local time)
📍 Wherever you are!

Join millions of people around the world for the Great ShakeOut earthquake drill! 

🔗 Register today: shakeout.org/oregon
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PNSN retweeted
WA Emergency Management
@waEMD
Oct 15
TODAY is the Great Washington ShakeOut! It’s the World’s Largest Earthquake Drill. Who’s ready to practice with us? 10:15 a.m. Still time to join us. 1.5 million strong so far. Shakeout.org/washington
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PNSN
@PNSN1
Oct 14
In advance of tomorrow's #ShakeOut earthquake drill, Fox Q13 stopped by the SeismoLab to speak to PNSN Director Harold Tobin about the recent M4.2 earthquake, monitoring seismic activity in the Pacific Northwest, and how to prepare for future earthquakes: fox13seattle.com/news/aftershoc…
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PNSN
@PNSN1
Oct 14
The @waShakeOut earthquake drill is tomorrow! Get ready to ShakeOut with us at 10:15 AM on 10/15—and remember to Drop, Cover, and Hold On whenever you feel the ground shake or get a @USGS_ShakeAlert warning on your phone.
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PNSN
@PNSN1
Oct 13
We're getting ready for the Great ShakeOut earthquake drill this week—and so is Dubs! He joined friends from PNSN and UW Emergency Management to check out the seismic upgrades at Suzzallo Library and practice our Drop, Cover and Hold On. Learn more here: shakeout.org/washington/
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PNSN
@PNSN1
Oct 9
Less than a 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 shakeout.org/washington/
UW mascot Dubs (a husky) under a desk at the PNSN SeismoLab, with a smiling bearded man in a PNSN t-shirt next to him.Dubs and a group of people in PNSN shirts outside Suzzallo Library in front of a fence with a sign about seismic improvements.
Dubs on a chair in front of a screen showing a Drop Cover Hold On graphic with a Titan strong motion accelerometer on the desk in front if him.A graphic reading "Get Ready to ShakeOut. October 15, 2026"
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PNSN
@PNSN1
Oct 9
Happy #FieldworkFriday! The PNSN field crew upgraded the battery bank at BURLY this week. BURLY contributes to @USGS_ShakeAlert earthquake early warning and serves as a repeater for seismic data transmitted by radio from EDM at Mt. St. Helens and WATCH near Mt. Rainier.
A seismic station with a solar panel and radio transmitters on a mountain ridge in the foreground and a view of Mt Rainier in the distance under a blue sky.Another view of the station with a metal box under the solar panel and Mt St Helens visible in the distance.
Another view of the solar panel with a PNSN field team member working on it.A man in a PNSN t shirt working inside the open metal box at the base of the station, with wiring and tools visible inside.
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