Historical tsunamis · Aug 6, 1984, 7:06 PM UTC
1984 Kyushu, Japan tsunami
Japan
The tsunami of Aug 6, 1984, 7:06 PM UTC originated near Kyushu, Japan (Japan).
Key facts
- Date
- Aug 6, 1984, 7:06 PM UTC
- Cause
- Earthquake
- Magnitude
- M7.0
- Depth
- 46 km
- Maximum documented water height
- 0.20 m
- Injuries
- 9
- Observation records
- 6
- Countries affected
- 1
It was triggered by a magnitude 7.0 earthquake at a depth of 46 km.
The highest documented water height was 0.20 m (Nobeoka, Japan).
6 observation sites in 1 countries are recorded.
Map of observation sites
6Each 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 | 6 | 0.20 m Nobeoka | — | — |
Highest documented water heights
6 / 6Individual 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 |
|---|---|---|---|
| Nobeoka · Miyazaki | 0.20 m | 35 km | Japan |
| Hyuga-Shirahama · Miyazaki | 0.14 m | 27 km | Japan |
| Tosa-Shimizu · Kochi | 0.13 m | 105 km | Japan |
| Murotomisaki · Kochi | 0.12 m | 230 km | Japan |
| Kochi · Kochi | 0.04 m | 198 km | Japan |
| Owase · Mie | 0.03 m | 439 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.