Historical tsunamis · Nov 18, 1941, 4:46 PM UTC
1941 Seikaido tsunami
Japan
The tsunami of Nov 18, 1941, 4:46 PM UTC originated near Seikaido (Japan).
Key facts
- Date
- Nov 18, 1941, 4:46 PM UTC
- Cause
- Earthquake
- Magnitude
- M7.4
- Depth
- 10 km
- Maximum documented water height
- 1.20 m
- Deaths
- 2
- Houses destroyed
- 27
- Damage
- limited (under US$ 1 million)
- Observation records
- 11
- Countries affected
- 1
It was triggered by a magnitude 7.4 earthquake at a depth of 10 km.
The highest documented water height was 1.20 m.
11 observation sites in 1 countries are recorded.
The database records 2 deaths.
Houses destroyed: 27.
Damage is estimated at limited (under US$ 1 million).
Map of observation sites
11Each dot is a documented observation site; colour and size show the observed water height. The triangle marks the source.
Tsunami arrival times
Documented arrival times from the NOAA/NCEI database, showing the earliest recorded location per country. Coverage is incomplete: a country without an entry was not necessarily spared.
- 0:00 hEarthquake (origin) · Nov 18, 1941, 4:46 PM UTC
- 0:21 hJapan · Tosa-Shimizu · 0.62 m
3 places with a documented arrival time
Observations by country
| Country | Observation records | Maximum documented water height | Deaths | Earliest arrival |
|---|---|---|---|---|
| Japan | 11 | 1.00 m Aburatsu | — | 0:21 h |
Highest documented water heights
11 / 11Individual 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 |
|---|---|---|---|
| Aburatsu · Miyazaki | 1.00 m | 80 km | Japan |
| Hososhima · Miyazaki | 1.00 m | 63 km | Japan |
| Mimitsu · Miyazaki | 1.00 m | 59 km | Japan |
| Oriuzako · Miyazaki | 1.00 m | 64 km | Japan |
| Tosa-Shimizu · Kochi | 0.62 m | 118 km | Japan |
| Sukumo · Kochi | 0.60 m | 119 km | Japan |
| Murotomisaki · Kochi | 0.55 m | 240 km | Japan |
| Kushimoto · Wakayama | 0.20 m | 382 km | Japan |
| Tsukumi · Oita | 0.20 m | 122 km | Japan |
| Uwajima · Ehime | 0.13 m | 143 km | Japan |
| Saekiko · Oita | 0.05 m | 109 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.