Historical tsunamis · May 8, 1974, 11:33 PM UTC
1974 Tokaido tsunami
Japan
The tsunami of May 8, 1974, 11:33 PM UTC originated near Tokaido (Japan).
Key facts
- Date
- May 8, 1974, 11:33 PM UTC
- Cause
- Earthquake
- Magnitude
- M6.7
- Depth
- 2 km
- Maximum documented water height
- 0.20 m
- Deaths
- 30
- Injuries
- 137
- Houses destroyed
- 134
- Damage
- moderate (about US$ 1–5 million)
- Observation records
- 5
- Countries affected
- 1
It was triggered by a magnitude 6.7 earthquake at a depth of 2 km.
The highest documented water height was 0.20 m.
5 observation sites in 1 countries are recorded.
The database records 30 deaths.
Houses destroyed: 134.
Damage is estimated at moderate (about US$ 1–5 million).
Map of observation sites
5Each 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 | 5 | 0.08 m Omaezaki | — | — |
Highest documented water heights
5 / 5Individual 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 |
|---|---|---|---|
| Omaezaki · Shizuoka | 0.08 m | 44 km | Japan |
| Minami-Izu · Shizuoka | 0.06 m | 17 km | Japan |
| Kozushima · Izu-Oshima, Tokyo | 0.05 m | 58 km | Japan |
| Mera · Chiba | 0.04 m | 109 km | Japan |
| Uchiura · Shizuoka | 0.04 m | 49 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.