Historical tsunamis · Sep 5, 2004, 2:57 PM UTC
2004 South Coast Honshu Island tsunami
Japan
The tsunami of Sep 5, 2004, 2:57 PM UTC originated near South Coast Honshu Island (Japan).
Key facts
- Date
- Sep 5, 2004, 2:57 PM UTC
- Cause
- Earthquake
- Magnitude
- M7.4
- Depth
- 10 km
- Maximum documented water height
- 0.93 m
- Injuries
- 40
- Damage
- limited (under US$ 1 million)
- Observation records
- 24
- Countries affected
- 1
It was triggered by a magnitude 7.4 earthquake at a depth of 10 km.
The highest documented water height was 0.93 m (Kozushima, Japan).
24 observation sites in 1 countries are recorded.
Damage is estimated at limited (under US$ 1 million).
Map of observation sites
24Each 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) · Sep 5, 2004, 2:57 PM UTC
- 0:20 hJapan · Uragami · 0.61 m
24 places with a documented arrival time
Observations by country
| Country | Observation records | Maximum documented water height | Deaths | Earliest arrival |
|---|---|---|---|---|
| Japan | 24 | 0.93 m Kozushima | — | 0:20 h |
Highest documented water heights
15 / 24Individual 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 | 0.93 m | 223 km | Japan |
| Kushimoto · Wakayama | 0.86 m | 126 km | Japan |
| Uragami · Wakayama | 0.61 m | 116 km | Japan |
| Irozaki · Shizuoka | 0.58 m | 229 km | Japan |
| Owase · Mie | 0.58 m | 128 km | Japan |
| Ako, Honshu · Shizuoka | 0.49 m | 244 km | Japan |
| Mera · Chiba | 0.43 m | 319 km | Japan |
| Omaezaki · Shizuoka | 0.40 m | 190 km | Japan |
| Chichijima Island · Bonin Is, Tokyo | 0.39 m | 836 km | Japan |
| Tsubota · Tokyo | 0.37 m | 249 km | Japan |
| Murotomisaki · Kochi | 0.35 m | 271 km | Japan |
| Toba · Mie | 0.33 m | 146 km | Japan |
| Uchiura · Shizuoka | 0.33 m | 263 km | Japan |
| Tosa-Shimizu · Kochi | 0.31 m | 387 km | Japan |
| Okada · Izu-Oshima, Tokyo | 0.26 m | 278 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.