Historical tsunamis · Oct 5, 2023, 1:59 AM UTC
2023 Izu Islands, Japan tsunami
Japan
The tsunami of Oct 5, 2023, 1:59 AM UTC originated near Izu Islands, Japan (Japan).
Key facts
- Date
- Oct 5, 2023, 1:59 AM UTC
- Cause
- Earthquake
- Magnitude
- M6.1
- Depth
- 10 km
- Maximum documented water height
- 0.20 m
- Observation records
- 1
- Countries affected
- 1
It was triggered by a magnitude 6.1 earthquake at a depth of 10 km.
The highest documented water height was 0.20 m (Yaene, Hachijo Island, Japan).
1 observation sites in 1 countries are recorded.
Map of observation sites
1Each dot is a documented observation site; colour and size show the observed water height. The triangle marks the source.
Tsunami arrival times
Documented arrival times from the NOAA/NCEI database, showing the earliest recorded location per country. Coverage is incomplete: a country without an entry was not necessarily spared.
- 0:00 hEarthquake (origin) · Oct 5, 2023, 1:59 AM UTC
- 0:01 hJapan · Yaene, Hachijo Island · 0.20 m
1 places with a documented arrival time
Observations by country
| Country | Observation records | Maximum documented water height | Deaths | Earliest arrival |
|---|---|---|---|---|
| Japan | 1 | 0.20 m Yaene, Hachijo Island | — | 0:01 h |
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 |
|---|---|---|---|
| Yaene, Hachijo Island · Tokyo | 0.20 m | 351 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.