Historical tsunamis · Oct 12, 1935, 4:45 PM UTC
1935 Sanriku tsunami
Japan
The tsunami of Oct 12, 1935, 4:45 PM UTC originated near Sanriku (Japan).
Key facts
- Date
- Oct 12, 1935, 4:45 PM UTC
- Cause
- Earthquake
- Magnitude
- M7.2
- Depth
- 10 km
- Maximum documented water height
- 0.30 m
- Observation records
- 8
- Countries affected
- 1
It was triggered by a magnitude 7.2 earthquake at a depth of 10 km.
The highest documented water height was 0.30 m.
8 observation sites in 1 countries are recorded.
Map of observation sites
8Each 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) · Oct 12, 1935, 4:45 PM UTC
- 0:26 hJapan · Miyako
8 places with a documented arrival time
Observations by country
| Country | Observation records | Maximum documented water height | Deaths | Earliest arrival |
|---|---|---|---|---|
| Japan | 8 | 0.17 m Hachinohe | — | 0:26 h |
Highest documented water heights
8 / 8Individual 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 |
|---|---|---|---|
| Hachinohe · Aomori | 0.17 m | 197 km | Japan |
| Kesennumagyoko · Miyagi | 0.12 m | 212 km | Japan |
| Onagawa · Miyagi | 0.09 m | 254 km | Japan |
| Onahama · Fukushima | 0.08 m | 410 km | Japan |
| Tsukihama · Miyagi | 0.05 m | 244 km | Japan |
| Ishinomaki · Miyagi | 0.02 m | 267 km | Japan |
| Ayukawa · Miyagi | — | 260 km | Japan |
| Miyako · Iwate | — | 150 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.