Available Bulletins
Source-labelled public bulletins when a supported provider has a current record.
Geographic Context
Compare the affected ocean basin, nearby coasts and earthquake location on the globe.
Separate Timestamps
Bulletins, earthquakes and monitoring records can update at different times.
Official Decisions
Evacuation and all-clear instructions must come from the responsible warning center and local authority.
Understanding Tsunamis
Tsunamis are ocean waves caused by underwater earthquakes, volcanic eruptions, landslides or other displacement. PocketWorld provides geographic context for:
- Earthquake-triggered tsunamis (most common)
- Volcanic tsunamis
- Landslide-generated waves
- Meteorological tsunamis (meteotsunamis)
High-Risk Regions
Regions where official warning systems and local preparedness are especially important include:
- Pacific Ring of Fire - Japan, Indonesia, Philippines, Chile, Alaska
- Mediterranean Sea - Italy, Greece, Turkey
- Caribbean Sea
- Indian Ocean
How to interpret tsunami information
PocketWorld places available tsunami bulletins, earthquake context and monitoring locations on a shared globe so the affected ocean basin is easier to understand. A marker or reference zone is not itself an evacuation order. Bulletins can be revised as seismic analysis, tide gauges and deep-ocean sensors report new observations.
Always follow the responsible national warning center and local emergency authority for alerts, evacuation routes and all-clear messages. PocketWorld preserves source context and is intended for exploration, not as a replacement for an official warning channel.
Hazard data sources
Events are aggregated from USGS, EMSC, NOAA, NASA EONET, NASA FIRMS and GDACS, then normalized and deduplicated.
Frequently asked questions
How fast do tsunamis travel?
Tsunamis can travel at speeds up to 500 mph (800 km/h) in deep ocean water, slowing as they approach shore but gaining height.
What triggers a tsunami warning?
Official centers evaluate earthquake location, depth, magnitude, modelling and sea-level observations. Criteria and alert categories vary by responsible authority.
How much warning time is there?
It depends on the source and coastline. A nearby tsunami can arrive within minutes, so natural warning signs and local emergency instructions take priority over this website.