Historical tsunamis · Jul 23, 1982, 2:23 PM UTC
1982 Ibaraki, Japan tsunami
Japan
The tsunami of Jul 23, 1982, 2:23 PM UTC originated near Ibaraki, Japan (Japan).
Key facts
- Date
- Jul 23, 1982, 2:23 PM UTC
- Cause
- Earthquake
- Magnitude
- M7.2
- Depth
- 37 km
- Maximum documented water height
- 0.40 m
- Observation records
- 22
- Countries affected
- 1
It was triggered by a magnitude 7.2 earthquake at a depth of 37 km.
The highest documented water height was 0.40 m.
22 observation sites in 1 countries are recorded.
Map of observation sites
22Each 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 | 22 | 0.19 m Ayukawa | — | — |
Highest documented water heights
15 / 22Individual 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 |
|---|---|---|---|
| Ayukawa · Miyagi | 0.19 m | 234 km | Japan |
| Oaraiko · Ibaraki | 0.13 m | 102 km | Japan |
| Hitachiko · Ibaraki | 0.11 m | 102 km | Japan |
| Hatachi · Ibaraki | 0.10 m | 106 km | Japan |
| Onahama · Fukushima | 0.10 m | 109 km | Japan |
| Mera · Chiba | 0.09 m | 221 km | Japan |
| Sendaishinko · Miyagi | 0.09 m | 238 km | Japan |
| Somako · Fukushima | 0.09 m | 192 km | Japan |
| Mera · Chiba | 0.07 m | 221 km | Japan |
| Choshi · Chiba | 0.06 m | 90 km | Japan |
| Kamaishi · Iwate | 0.06 m | 341 km | Japan |
| Kashima · Ibaraki | 0.06 m | 95 km | Japan |
| Kozushima · Izu-Oshima, Tokyo | 0.05 m | 321 km | Japan |
| Minami-Izu · Shizuoka | 0.05 m | 310 km | Japan |
| Hachinohe · Aomori | 0.04 m | 482 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.