Public Information Statement
Issued by NWS Seattle/Tacoma, WA

141
NOUS46 KSEW 091618
PNSSEW

Public Information Statement
National Weather Service Seattle WA
918 AM PDT Thu Oct 9 2025

...The Great Washington ShakeOut and Tsunami Siren Test - Thursday
October 16...

On Thursday, October 16, 2025 at 1016 AM PDT, the National Weather
Service Forecast Offices in Seattle, Portland, Spokane, and
Pendleton will participate in the Great Washington ShakeOut
Earthquake and tsunami drill with state and local emergency
management officials. This is part of a global earthquake
preparedness effort.

Millions of people worldwide will practice how to drop, cover and
hold on at 1016 AM PDT on October 16th during the Great ShakeOut.
Washingtonians can join them by registering for the 2025 Great
Washington ShakeOut. Participation is a great way for your family or
organization to be better prepared to survive and recover quickly
from big earthquakes and their impacts. Over one million people in
Washington are expected to participate. Register for free today at
www.shakeout.org/washington

National Weather Service Offices across Washington will disseminate
a Required Monthly Test (RMT) message via the 21 NOAA Weather Radio
stations that serve the state to activate the Emergency Alert System
(EAS) to help kickoff the Great ShakeOut drill on October 16th at
1016 AM PDT. Broadcasters will carry the EAS message on television
and radio to help reach more of the state`s residents, along with
those who have all-hazard weather radio receivers. This will not be
a test of the Wireless Emergency Alerts (WEA) sent to cell phones.

In coastal areas, the Great ShakeOut earthquake and tsunami drill
will also include a test of the All Hazards Alert Broadcast tsunami
sirens. The purpose of the test is to get the public familiar with
what the sirens will sound like during a tsunami event. All of
Washingtons 120+ tsunami sirens along the inner and outer coast
will be tested at 1016 AM using the real wailing sound of a tsunami
warning, not the Westminster Chimes that are typically used during
the monthly tests. Please do not call 911.

Preparedness experts encourage you to participate in the Great
ShakeOut. This is an audio recording you can use to make the
experience more realistic: https://bit.ly/DRILLRECORDING

If you have any questions or comments, please contact NWS Seattle
Warning Coordination Meteorologist Reid Wolcott at 206-526-6095 x223.

#ShakeOut

$$

www.weather.gov/seattle/