Historical tsunamis · Jul 25, 1970, 10:41 PM UTC
1970 Seikaido tsunami
Japan
The tsunami of Jul 25, 1970, 10:41 PM UTC originated near Seikaido (Japan).
Key facts
- Date
- Jul 25, 1970, 10:41 PM UTC
- Cause
- Earthquake
- Magnitude
- M7.0
- Depth
- 34 km
- Maximum documented water height
- 0.32 m
- Injuries
- 13
- Damage
- limited (under US$ 1 million)
- Observation records
- 35
- Countries affected
- 1
It was triggered by a magnitude 7.0 earthquake at a depth of 34 km.
The highest documented water height was 0.32 m (Kannoura, Japan).
35 observation sites in 1 countries are recorded.
Damage is estimated at limited (under US$ 1 million).
Map of observation sites
35Each 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 | 35 | 0.32 m Kannoura | — | — |
Highest documented water heights
15 / 35Individual 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 |
|---|---|---|---|
| Kannoura · Kochi | 0.32 m | 286 km | Japan |
| Kannoura (Toyocho) · Kochi | 0.32 m | 286 km | Japan |
| Murotomisaki · Kochi | 0.28 m | 260 km | Japan |
| Tosa-Shimizu · Kochi | 0.23 m | 135 km | Japan |
| Aburatsu · Miyazaki | 0.20 m | 74 km | Japan |
| Kamaegyoko · Oita | 0.19 m | 70 km | Japan |
| Odomari · Kagoshima | 0.16 m | 163 km | Japan |
| Odomari · Kagoshima | 0.16 m | 163 km | Japan |
| Kamikawaguchiko · Kochi | 0.13 m | 156 km | Japan |
| Makurazaki · Kagoshima | 0.13 m | 168 km | Japan |
| Mishoko · Ehime | 0.13 m | 81 km | Japan |
| Kataura · Kagoshima | 0.12 m | 168 km | Japan |
| Miyanoura · Miyazaki | 0.12 m | 55 km | Japan |
| Ehime-Misaki · Ehime | 0.11 m | 169 km | Japan |
| Misakiko · Ehime | 0.11 m | 137 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.