Historical tsunamis · Aug 9, 1901, 9:23 AM UTC
1901 Off Northeast Coast Honshu tsunami
Japan
The tsunami of Aug 9, 1901, 9:23 AM UTC originated near Off Northeast Coast Honshu (Japan).
Key facts
- Date
- Aug 9, 1901, 9:23 AM UTC
- Cause
- Earthquake
- Magnitude
- M7.2
- Depth
- 33 km
- Maximum documented water height
- 0.60 m
- Damage
- moderate (about US$ 1–5 million)
- Observation records
- 3
- Countries affected
- 1
It was triggered by a magnitude 7.2 earthquake at a depth of 33 km.
The highest documented water height was 0.60 m (Miyako, Japan).
3 observation sites in 1 countries are recorded.
Damage is estimated at moderate (about US$ 1–5 million).
Map of observation sites
3Each 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 9, 1901, 9:23 AM UTC
- 0:27 hJapan · Ayukawa · 0.23 m
1 places with a documented arrival time
Observations by country
| Country | Observation records | Maximum documented water height | Deaths | Earliest arrival |
|---|---|---|---|---|
| Japan | 3 | 0.60 m Miyako | — | 0:27 h |
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 |
|---|---|---|---|
| Miyako · Iwate | 0.60 m | 104 km | Japan |
| Ayukawa · Miyagi | 0.23 m | 259 km | Japan |
| Nemuroko · Hokkaido | 0.04 m | 407 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.