Historical tsunamis · Feb 29, 1972, 9:22 AM UTC
1972 East Off Hachijo Island tsunami
Japan
The tsunami of Feb 29, 1972, 9:22 AM UTC originated near East Off Hachijo Island (Japan).
Key facts
- Date
- Feb 29, 1972, 9:22 AM UTC
- Cause
- Earthquake
- Magnitude
- M7.4
- Depth
- 56 km
- Maximum documented water height
- 0.42 m
- Observation records
- 28
- Countries affected
- 1
It was triggered by a magnitude 7.4 earthquake at a depth of 56 km.
The highest documented water height was 0.42 m.
28 observation sites in 1 countries are recorded.
Map of observation sites
28Each dot is a documented observation site; colour and size show the observed water height. The triangle marks the source.
Observations by country
| Country | Observation records | Maximum documented water height | Deaths | Earliest arrival |
|---|---|---|---|---|
| Japan | 28 | 0.23 m Mera | — | — |
Highest documented water heights
15 / 28Individual 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 |
|---|---|---|---|
| Mera · Chiba | 0.23 m | 201 km | Japan |
| Mera · Chiba | 0.23 m | 201 km | Japan |
| Yaene, Hachijo Island · Tokyo | 0.21 m | 99 km | Japan |
| Omaezaki · Shizuoka | 0.16 m | 279 km | Japan |
| Hitachiko · Ibaraki | 0.14 m | 355 km | Japan |
| Onahama · Fukushima | 0.13 m | 403 km | Japan |
| Minami-Izu · Shizuoka | 0.12 m | 230 km | Japan |
| Owase · Mie | 0.12 m | 435 km | Japan |
| Owase · Mie | 0.12 m | 435 km | Japan |
| Katsuura · Chiba | 0.11 m | 210 km | Japan |
| Kushimoto · Wakayama | 0.11 m | 467 km | Japan |
| Aburatsu · Miyazaki | 0.09 m | 902 km | Japan |
| Ayukawa · Miyagi | 0.09 m | 558 km | Japan |
| Miyake Island · Bonin Is, Tokyo | 0.09 m | 149 km | Japan |
| Nagashima · Mie | 0.09 m | 426 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.