Historical tsunamis · Oct 8, 2023
2023 Izu Islands, Japan tsunami
Japan
The tsunami of Oct 8, 2023 originated near Izu Islands, Japan (Japan).
Key facts
- Date
- Oct 8, 2023
- Cause
- Volcano and landslide
- Magnitude
- M4.9
- Depth
- 10 km
- Maximum documented water height
- 0.60 m
- Observation records
- 29
- Countries affected
- 1
Cause according to NOAA/NCEI: Volcano and landslide.
The highest documented water height was 0.60 m.
29 observation sites in 1 countries are recorded.
Map of observation sites
29Each 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 | 29 | 0.70 m Yaene, Hachijo Island | — | — |
Highest documented water heights
15 / 29Individual 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 |
|---|---|---|---|
| Yaene, Hachijo Island · Tokyo | 0.70 m | 377 km | Japan |
| Kozushima · Izu-Oshima, Tokyo | 0.44 m | 506 km | Japan |
| Tsubota · Tokyo | 0.41 m | 484 km | Japan |
| Tosa-Shimizu · Kochi | 0.34 m | 744 km | Japan |
| Nakanoshima (Nakano Island) · Kagoshima | 0.31 m | 972 km | Japan |
| Ako · Tokyo | 0.29 m | 486 km | Japan |
| Odomari · Kagoshima | 0.26 m | 898 km | Japan |
| Kaminato, Hachijo Island · Tokyo | 0.23 m | 381 km | Japan |
| Shibushi-Ko · Kagoshima | 0.20 m | 866 km | Japan |
| Kure · Kochi | 0.18 m | 749 km | Japan |
| Mera · Chiba | 0.17 m | 579 km | Japan |
| Okada · Izu-Oshima, Tokyo | 0.17 m | 566 km | Japan |
| Chichijima Island · Bonin Is, Tokyo | 0.16 m | 366 km | Japan |
| Minami-Izu · Shizuoka | 0.16 m | 554 km | Japan |
| Gobo · Wakayama | 0.15 m | 642 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.