1767 Tsunami: Guam, Mariana Islands, US Territories
A tsunami of unknown cause began at Guam, Mariana Islands, US Territories in 1767. 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
- 1767
- Source
- Guam, Mariana Islands, US Territories
- Cause
- Unknown
- Runups recorded
- 1
- Waters
- Ocean
- How certain
- Very doubtful tsunami
- Source location
- 14.000° N, 143.300° E
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.
Unconfirmed report 1767, 1769, 1779, or 1799. A tsunami probably occurred. An unconfirmed tsunami has also been reported from the late 18th Century as having caused severe damage in Agana and Umatac with several fatalities. This event has been reported as having occurred in 1767 (Farrell); 1769 (Guam Reporter, Jan. 1929, p 217); 1779 (?) and 1799 (Maso 1910). (Ref #482)
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 |
|---|---|---|---|---|---|---|---|
| Guam, Mariana Islands, GU | US Territories | 0 | Eyewitness observation of water height |
More
Every tsunami in 1767The 1700sTsunamis of US TerritoriesAlerts 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 2932.