April 19, 1965 Tsunami: Aichi Prefecture, Japan
A tsunami caused by a magnitude 6 earthquake began at Aichi Prefecture, Japan on April 19, 1965 at 23:42 UTC. The water rose as high as 0.1 meters. Its effects were recorded at 2 places.
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 19, 1965, 23:42 UTC
- Source
- Aichi Prefecture, Japan
- Cause
- Earthquake
- Earthquake
- Magnitude 6, 36 km deep
- Maximum water height
- 0.1 m (0.3 ft)
- Runups recorded
- 2
- Tsunami intensity (Soloviev-Imamura)
- -4
- Waters
- Ocean
- How certain
- Erroneous entry
- Source location
- 34.900° N, 139.000° 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.
Reference #414:
1965, April 20, 8:42 local time. There was an earthquake, which did light damage to buildings at Shimizu, Shizuoka Prefecture...Soon afterwards, the tide gauges at Tagono'ura and Uchi'ura registered oscillations in level with a height of up to 10 cm and a period of 5 + minutes. Apparently, these were seiches of seismic origin, and not a tsunami.
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 |
|---|---|---|---|---|---|---|---|
| Uchiura | Japan | 17 | 0.1 | Other | |||
| Tagonoura | Japan | 38 | 0.1 | Other |
More
Every tsunami in 1965The 1900sTsunamis of JapanThe earthquakeThis 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 5505.