Historical tsunamis · Aug 5, 1927, 9:13 PM UTC
1927 Sanriku tsunami
Japan
The tsunami of Aug 5, 1927, 9:13 PM UTC originated near Sanriku (Japan).
Key facts
- Date
- Aug 5, 1927, 9:13 PM UTC
- Cause
- Earthquake
- Magnitude
- M6.9
- Depth
- 10 km
- Maximum documented water height
- 0.10 m
- Damage
- limited (under US$ 1 million)
- Observation records
- 5
- Countries affected
- 1
It was triggered by a magnitude 6.9 earthquake at a depth of 10 km.
The highest documented water height was 0.10 m.
5 observation sites in 1 countries are recorded.
Damage is estimated at limited (under US$ 1 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.
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) · Aug 5, 1927, 9:13 PM UTC
- 0:30 hJapan · Ayukawa
4 places with a documented arrival time
Observations by country
| Country | Observation records | Maximum documented water height | Deaths | Earliest arrival |
|---|---|---|---|---|
| Japan | 5 | 0.08 m Hanabuchi | — | 0:30 h |
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 |
|---|---|---|---|
| Hanabuchi · Miyagi | 0.08 m | 94 km | Japan |
| Ishinomaki · Miyagi | 0.03 m | 86 km | Japan |
| Tsukihama · Miyagi | 0.03 m | 88 km | Japan |
| Ayukawa · Miyagi | — | 62 km | Japan |
| Miyako · Iwate | — | 194 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.