April 12, 1969 Tsunami: Norsalv River, Sweden
A tsunami caused by a landslide began at Norsalv River, Sweden on April 12, 1969 at 05:44 UTC. The water rose as high as 5 meters. 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
- April 12, 1969, 05:44 UTC
- Source
- Norsalv River, Sweden
- Cause
- Landslide
- Maximum water height
- 5 m (16.4 ft)
- Runups recorded
- 1
- Waters
- A lake or river, not the ocean
- How certain
- Probable tsunami
- Source location
- 59.400° N, 13.500° 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.
At 05447 GMT, April 12, 1969, a landslide of sensitive sedimentary formations at the Norsalv River, 7 km north of Lake Vener in Sweden, blocked the river over a length of 750 m and generated waves in the river 4-5 m in height. (reference #3741)
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 |
|---|---|---|---|---|---|---|---|
| Norsalv River | Sweden | 0 | 5 | Eyewitness observation of water height |
More
Every tsunami in 1969The 1900sTsunamis of SwedenThis 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 3350.