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Tsunami Warning Systems

A comprehensive look at the global infrastructure of tsunami warning — from seismic detection networks and ocean buoys to the agencies that issue official alerts.

Scientists at a tsunami monitoring centre tracking earthquake and ocean data on large screens
Tsunami Warning SystemsJune 29, 2026

How Tsunami Warning Systems Work: From Earthquake Detection to Public Alerts

A complete guide to how global tsunami warning systems detect earthquakes, assess tsunami risk, and issue alerts — from seismic networks and DART buoys to the agencies and technology that protect coastal communities worldwide.

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Person on a coastline looking at a smartphone displaying an emergency alert notification
Tsunami Warning Systems

What Is the Difference Between a Tsunami Watch, Advisory, and Warning?

Watch, advisory, warning — these terms sound similar, but they communicate very different levels of concern and may require different responses. Here is what each one means.

September 11, 2026·6 min
Dramatic coastline with a smartphone displaying an emergency tsunami notification and a clock subtly overlaid — illustrating the question of how much warning time remains
Tsunami Warning Systems

How Much Warning Time Do You Get Before a Tsunami Arrives?

One of the most common questions after hearing about a tsunami warning is: how much time do I have? The answer depends on where the earthquake occurred, how far away it was, and how fast the waves travel.

July 13, 2026·7 min
Scientists at an emergency operations centre monitoring earthquake data and world maps on large screens
Tsunami Warning Systems

How Tsunami Alerts Are Issued: From Earthquake Detection to Public Warning

When a major earthquake occurs beneath the ocean, how do authorities know whether a tsunami is coming — and how do warnings reach people so quickly? This article explains the full process, from seismic detection to public alert.

July 25, 2026·7 min

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