September 11, 1790 Tsunami: E. Aleutian Islands, AK, United States
A tsunami of meteorological origin began at E. Aleutian Islands, AK, United States on September 11, 1790. Its effects were recorded at 1 place.
Where the waves reached
The source (white) and every runup with a place, colored by the water height recorded there. A ring is a runup NCEI marks doubtful.
- Under 1 m
- 1 to 3 m
- 3 to 10 m
- 10 to 30 m
- 30 m and more
- Height not recorded
The tsunami
- Date
- September 11, 1790
- Source
- E. Aleutian Islands, AK, United States
- Cause
- Meteorological
- Runups recorded
- 1
- Waters
- Ocean
- How certain
- Erroneous entry
The toll
The record gives no deaths, injuries or damage for this tsunami.
What the record says
NCEI’s account, from the sources it cites.
This seaquake south of Unalaska followed a severe storm; reported agitation of the sea due to the seaquake was apparently a consequence of the storm, not the quake.
Every runup
Nearest the source first. Heights are above sea level at the time; a tide gauge reads half the wave’s full height.
| Where | Country | Km from source | Water height, m | Inland, m | Measured by | First wave, UTC | Deaths |
|---|---|---|---|---|---|---|---|
| E. Aleutian Islands, AK, AK | United States | Eyewitness observation of water height |
More
Every tsunami in 1790The 1700sTsunamis of United StatesThis day in weather historyAlerts in force
Sources
Tsunami events and runups from NOAA’s National Centers for Environmental Information, Global Historical Hazard Database, cited as NCEI/WDS, doi:10.7289/V5PN93H7. Public domain. Read 2026-09-24. NCEI tsunami event 554.