American Samoa, 2011

Tsunami in American Samoa, March 11, 2011

March 11, 2011 · NWS ASO · 3 events in 3 counties and zones

1 magnitude earthquake near Japan generated tsunami waves across the Pacific. 5 feet.

The toll

Deaths
0
Injuries
0
Property damage
None recorded
Crop damage
None recorded
Events
3

Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.

What happened

The episode as NWS ASO wrote it up.

A 9.1 magnitude earthquake near Japan generated tsunami waves across the Pacific. A tide gage at the Pago Pago bay recorded tsunami waves peaking to near 3.5 feet. During high tides in the afternoon, local wave energy came over land and across the Pago Plaza on the Island of Tutuila after the cancellation of the tsunami warning. No injuries or fatalities reported.

Event by event

3 tsunami. Local standard time, as filed.

Tsunami, Tutuila

When
March 11, 4:00 AM SST to 11:00 AM SST
Where
Tutuila forecast zone
Reported by
Other Federal Agency

Tsunami, Swains

When
March 11, 4:00 AM SST to 11:00 AM SST
Where
Swains forecast zone
Reported by
Other Federal Agency

Tsunami, Manu'A

When
March 11, 4:00 AM SST to 11:00 AM SST
Where
Manu'A forecast zone
Reported by
Other Federal Agency

What these are

Tsunami
A series of waves caused by an undersea earthquake, landslide or eruption.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

More

Every storm in American Samoa in 2011Every state in 2011This day in weather historyWarnings in American Samoa, March 2011

Sources

NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 277954, 283405, 283406.