Historical tsunamis · Feb 21, 1991, 2:35 AM UTC
1991 Bering Sea, Ak tsunami
United States
The tsunami of Feb 21, 1991, 2:35 AM UTC originated near Bering Sea, Ak (United States).
Key facts
- Date
- Feb 21, 1991, 2:35 AM UTC
- Cause
- Earthquake
- Magnitude
- M6.7
- Depth
- 20 km
- Maximum documented water height
- 0.15 m
- Observation records
- 2
- Countries affected
- 1
It was triggered by a magnitude 6.7 earthquake at a depth of 20 km.
The highest documented water height was 0.15 m (Unalaska, Dutch Harbor, Ak, United States).
2 observation sites in 1 countries are recorded.
Map of observation sites
2Each dot is a documented observation site; colour and size show the observed water height. The triangle marks the source.
Observations by country
| Country | Observation records | Maximum documented water height | Deaths | Earliest arrival |
|---|---|---|---|---|
| United States | 2 | 0.15 m Unalaska, Dutch Harbor, Ak | — | — |
Highest documented water heights
2 / 2Individual documented observations for this event. Heights come from different measurement types and sources; not every location has a measured height.
| Location / station | Observed height | Distance from source | Country |
|---|---|---|---|
| Unalaska, Dutch Harbor, Ak · Ak | 0.15 m | 749 km | United States |
| Adak, Sweeper Cove, Ak · Ak | 0.11 m | 735 km | United States |
More tsunamis
Source: NOAA National Centers for Environmental Information (NCEI), Global Historical Tsunami Database. Confirmed events only. Deaths and damage are database estimates; older records are incomplete. Water heights come from different types of observation.