Historical tsunamis · Apr 17, 1948, 4:11 PM UTC
1948 Tokaido tsunami
Japan
The tsunami of Apr 17, 1948, 4:11 PM UTC originated near Tokaido (Japan).
Key facts
- Date
- Apr 17, 1948, 4:11 PM UTC
- Cause
- Earthquake
- Magnitude
- M7.2
- Depth
- 40 km
- Maximum documented water height
- 0.60 m
- Observation records
- 3
- Countries affected
- 1
It was triggered by a magnitude 7.2 earthquake at a depth of 40 km.
The highest documented water height was 0.60 m (Inami, Japan).
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 | 0.60 m Inami | — | — |
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 |
|---|---|---|---|
| Inami · Wakayama | 0.60 m | 87 km | Japan |
| Kushimoto · Wakayama | 0.17 m | 44 km | Japan |
| Tosa-Shimizu · Kochi | 0.10 m | 250 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.