Tsunami Warnings

How this page works: Tsunami warnings are detected from the official USGS Earthquake Hazards Program real-time feed. When USGS flags an earthquake with a tsunami warning (typically M7.0+ shallow offshore earthquakes), it appears here immediately. For official government alerts, always monitor tsunami.gov (NOAA/PTWC) and your local emergency services. This page updates continuously as events occur, plus a full refresh at the top of every hour.

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Earthquakes with Tsunami Warnings — Past 30 Days

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NOAA Tsunami Warning Levels

WARNING

A tsunami with potential for damage and casualties is imminent, expected, or occurring. Evacuate immediately from threatened coastal areas.

WATCH

A tsunami may have been generated that could cause damage. Be prepared to evacuate on short notice.

ADVISORY

A tsunami capable of producing strong currents dangerous to those in or near the water is expected. Stay away from the shore.

INFORMATION

An earthquake has occurred that may generate a tsunami. No destructive tsunami is expected but stay alert for updates.

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Official Warning Sources

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tsunami.gov — NOAA / PTWC

U.S. Tsunami Warning Centers — Pacific & Atlantic/Gulf/Caribbean

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IOC / UNESCO Tsunami Programme

International coordination, Indian Ocean & Caribbean warning systems

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USGS Earthquake Hazards Program

Real-time global seismic monitoring and tsunami flagging

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ShakeNet — Raspberry Shake Network

World's largest community seismic network contributing real-time data

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NOAA NCEI Tsunami Database

Historical tsunami event database and runup records

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About Tsunami Detection

What triggers a warning?
Tsunami warnings are typically issued when an earthquake meets specific criteria: magnitude ≥ 7.0, shallow depth (under 100 km), and location beneath or near the ocean floor. The USGS sets a tsunami:1 flag in their feed when these conditions are met.

DART Buoy Network
NOAA operates a network of Deep-ocean Assessment and Reporting of Tsunamis (DART) buoys that detect pressure changes from passing tsunamis and transmit data in real time to confirm wave generation.

International Coordination
The IOC/UNESCO coordinates four regional tsunami warning systems: the Pacific (PTWS), Indian Ocean (IOTWS), Caribbean (CARIBE-EWS), and North-East Atlantic & Mediterranean (NEAMTWS), covering all major ocean basins.

⚠️ Safety Notice
This website is for informational purposes only. Always follow official government emergency warnings from your national meteorological and civil defense agencies. Do not rely solely on this site during an emergency.

Checking… · – · Data updates as events occur + hourly refresh

Earthquakes with Tsunami Warnings — Past 30 Days

NOAA Tsunami Warning Levels

Official Warning Sources

About Tsunami Detection