Historical tsunamis · Sep 23, 1990, 9:13 PM UTC
1990 W. of Bonin Islands, Izu Is., Japan tsunami
Japan
The tsunami of Sep 23, 1990, 9:13 PM UTC originated near W. of Bonin Islands, Izu Is., Japan (Japan).
Key facts
- Date
- Sep 23, 1990, 9:13 PM UTC
- Cause
- Earthquake
- Magnitude
- M6.5
- Depth
- 10 km
- Maximum documented water height
- 0.20 m
- Observation records
- 4
- Countries affected
- 1
It was triggered by a magnitude 6.5 earthquake at a depth of 10 km.
The highest documented water height was 0.20 m.
4 observation sites in 1 countries are recorded.
Map of observation sites
4Each 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 |
|---|---|---|---|---|
| Japan | 4 | 0.15 m Kozushima | — | — |
Highest documented water heights
4 / 4Individual 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 |
|---|---|---|---|
| Kozushima · Izu-Oshima, Tokyo | 0.15 m | 115 km | Japan |
| Yaene, Hachijo Island · Tokyo | 0.10 m | 106 km | Japan |
| Okada · Izu-Oshima, Tokyo | 0.06 m | 182 km | Japan |
| Oshima · Izu-Oshima, Tokyo | — | 174 km | Japan |
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.