Historical tsunamis · Jun 18, 1933, 9:37 PM UTC
1933 Sanriku tsunami
Japan
The tsunami of Jun 18, 1933, 9:37 PM UTC originated near Sanriku (Japan).
Key facts
- Date
- Jun 18, 1933, 9:37 PM UTC
- Cause
- Earthquake
- Magnitude
- M7.1
- Depth
- 20 km
- Maximum documented water height
- 0.20 m
- Observation records
- 8
- Countries affected
- 1
It was triggered by a magnitude 7.1 earthquake at a depth of 20 km.
The highest documented water height was 0.20 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) · Jun 18, 1933, 9:37 PM UTC
- 0:22 hJapan · Hanabuchi · 0.07 m
8 places with a documented arrival time
Observations by country
| Country | Observation records | Maximum documented water height | Deaths | Earliest arrival |
|---|---|---|---|---|
| Japan | 8 | 0.09 m Hachinohe | — | 0:22 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 | 0.09 m | 280 km | Japan |
| Hanabuchi · Miyagi | 0.07 m | 121 km | Japan |
| Tsukihama · Miyagi | 0.07 m | 98 km | Japan |
| Ishinomaki · Miyagi | 0.05 m | 105 km | Japan |
| Oshima (Shiogamako) · Miyagi | 0.05 m | 125 km | Japan |
| Ayukawa · Miyagi | — | 82 km | Japan |
| Hakodate · Hokkaido | — | 426 km | Japan |
| Miyako · Iwate | — | 176 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.