Historical tsunamis · Apr 8, 1994, 1:10 AM UTC
1994 Hokkaido Island tsunami
Japan
The tsunami of Apr 8, 1994, 1:10 AM UTC originated near Hokkaido Island (Japan).
Key facts
- Date
- Apr 8, 1994, 1:10 AM UTC
- Cause
- Earthquake
- Magnitude
- M6.4
- Depth
- 13 km
- Maximum documented water height
- 0.11 m
- Observation records
- 3
- Countries affected
- 1
It was triggered by a magnitude 6.4 earthquake at a depth of 13 km.
The highest documented water height was 0.11 m.
3 observation sites in 1 countries are recorded.
Map of observation sites
3Each 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 | 3 | 0.08 m Ofunato | — | — |
Highest documented water heights
3 / 3Individual 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 |
|---|---|---|---|
| Ofunato · Iwate | 0.08 m | 242 km | Japan |
| Ayukawa · Miyagi | 0.07 m | 318 km | Japan |
| Hachinohe · Aomori | 0.07 m | 182 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.