Earthquake Early Warning

Earthquake early warning systems detect earthquakes already in progress. EEW is not earthquake prediction. An EEW system detects the first seismic waves and determines if there will be significant shaking. The system will send an alert in the event there is significant shaking expected. EEW systems trigger automated actions, to include slowing down trains, closing water valves, opening firehouse doors, and starting back-up generators. EEW systems also may trigger public alerts to individuals.
Systems for EEW exist around the world. Mexico, Japan, Romania, Italy, China, Taiwan, Israel, and Costa Rica have some level of EEW systems, to name a few! ShakeAlert® is the earthquake early warning system for the west coast of the United States. California, Oregon, and Washington provide alerts for automated actions.
If you feel shaking or get an alert, immediately Drop, Cover, and Hold on. Do not wait because seconds matter.

  • 7 Number of Resources

Rocket Rules Activity and Coloring Book for Earthquake Science!
Time: / Level: Novice

Let Rocket be your expert guide through all things earthquake science! Learn about earthquakes through coloring pages, crosswords, matching activities, and so much more.

Go to Resource

ShakeAlert: Earthquake Early Warning System for the West Coast
Time: 4m 35s / Level: Novice

This new animation (2020) describes the ShakeAlert Earthquake Early Warning app: How it works, why we should have it. Made in collaboration with governmental agencies and universities on the West Coast.

Go to Resource

ShakeAlert—El sistema de alerta Temprana para la Costa Oeste de los EEUU
Time: 5m 10s / Level: Novice

Más de 143 millones de personas en Estados Unidos están expuestas al temblor potencialmente destructivo de los terremotos.

¿Cómo funciona ShakeAlert? Esta animación explica cómo funciona ShakeAlert.

Go to Resource

ShakeAlert Earthquake Alert Times in the Pacific Northwest
Time: / Level: Novice

What would you do with seconds to prepare for earthquake shaking? With even a few seconds, the ShakeAlert® Earthquake Early Warning can save lives and reduce injuries by alerting people that an earthquake may cause shaking near you as it triggers automated actions.

Go to Resource

Earthquake Early Warning System for the Pacific Northwest
Time: / Level: Novice

On March 11, 2011, a devastating magnitude-9 earthquake struck off the coast of Tohoku, Japan, where the Pacific Plate dives beneath the Okhotsk Plate. On January 26th, 1700, the West Coast of the United States experienced a similar tsunami-generating megathrust earthquake. An earthquake like this will strike the Cascadia subduction zone again. How can we protect ourselves?

Go to Resource

ShakeAlert®—Sistema de Alerta Temprana de Terremotos para el Noroeste del Pacífico
Time: 3m 38s / Level: Novice

El 11 de marzo del 2011, un devastador terremoto de magnitud 9 sacudió la costa de Tohoku, Japón. El 26 de Enero del año 1700, la Costa Oeste de los Estados Unidos experimentó un mega terremoto generador de tsunami similar.  Un terremoto como este estremecerá nuevamente la zona de subducción de Cascadia, impactando toda la Costa Oeste.

Go to Resource

What you should do when Earthquake Early Warning comes to the West Coast
Time: 1m 52s / Level: Novice

The ShakeAlert® Earthquake Early Warning System for the West Coast of the United States aims to provide seconds to tens of seconds of early warning before earthquake shaking strikes. ShakeAlert® is not earthquake prediction, but quickly detects the first arriving seismic wave to provide an alert before more damaging seismic shaking arrives at your location. For more information, visit

Go to Resource

We encourage the reuse and dissemination of the material on this site as long as attribution is retained. To this end the material on this site, unless otherwise noted, is offered under Creative Commons Attribution (CC BY 4.0) license