Historical tsunamis · Jul 27, 1949, 6:00 PM UTC
1949 Columbia River Valley, Wa tsunami
United States
The tsunami of Jul 27, 1949, 6:00 PM UTC originated near Columbia River Valley, Wa (United States).
Key facts
- Date
- Jul 27, 1949, 6:00 PM UTC
- Cause
- Landslide
- Maximum documented water height
- 19.8 m
- Damage
- limited (under US$ 1 million)
- Observation records
- 1
- Countries affected
- 1
Cause according to NOAA/NCEI: Landslide.
The highest documented water height was 19.8 m (F.d. Roosevelt Lake, Wa, United States).
1 observation sites in 1 countries are recorded.
Damage is estimated at limited (under US$ 1 million).
Map of observation sites
1Each 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 | 1 | 19.8 m F.d. Roosevelt Lake, Wa | — | — |
Highest documented water heights
1 / 1Individual 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 |
|---|---|---|---|
| F.d. Roosevelt Lake, Wa · Wa | 19.81 m | 4 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.