Historical tsunamis · Oct 31, 2003, 1:06 AM UTC
2003 E. Honshu Island tsunami
Japan
The tsunami of Oct 31, 2003, 1:06 AM UTC originated near E. Honshu Island (Japan).
Key facts
- Date
- Oct 31, 2003, 1:06 AM UTC
- Cause
- Earthquake
- Magnitude
- M7.0
- Depth
- 10 km
- Maximum documented water height
- 0.32 m
- Observation records
- 4
- Countries affected
- 1
It was triggered by a magnitude 7.0 earthquake at a depth of 10 km.
The highest documented water height was 0.32 m (Ayukawa Oshikacho, Japan).
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.
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 31, 2003, 1:06 AM UTC
- 0:37 hJapan · Ayukawa Oshikacho · 0.32 m
4 places with a documented arrival time
Observations by country
| Country | Observation records | Maximum documented water height | Deaths | Earliest arrival |
|---|---|---|---|---|
| Japan | 4 | 0.32 m Ayukawa Oshikacho | — | 0:37 h |
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 |
|---|---|---|---|
| Ayukawa Oshikacho · Miyagi | 0.32 m | 112 km | Japan |
| Ofunato · Iwate | 0.22 m | 154 km | Japan |
| Kamaishi · Iwate | 0.06 m | 174 km | Japan |
| Miyako · Iwate | 0.06 m | 211 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.