Historical tsunamis · Sep 18, 2025, 6:58 PM UTC
2025 Kamchatka Peninsula, Russia tsunami
Russia
The tsunami of Sep 18, 2025, 6:58 PM UTC originated near Kamchatka Peninsula, Russia (Russia).
Key facts
- Date
- Sep 18, 2025, 6:58 PM UTC
- Cause
- Earthquake
- Magnitude
- M7.8
- Depth
- 19 km
- Maximum documented water height
- 0.31 m
- Observation records
- 33
- Countries affected
- 6
It was triggered by a magnitude 7.8 earthquake at a depth of 19 km.
The highest documented water height was 0.31 m (Semjachik, Kamchatka, Russia).
33 observation sites in 6 countries are recorded.
Outside the source country, the earliest documented arrival was at D21415 Bpr, 175 Nm S of Attu, Ak (United States) after 1:04 h.
Map of observation sites
33Each 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) · Sep 18, 2025, 6:58 PM UTC
- 0:37 hRussia · D21416, Kamchatka · 0.04 m
- 1:04 hUnited States · D21415 Bpr, 175 Nm S of Attu, Ak · 0.06 m
- 2:58 hJapan · D21413, SE Tokyo, Japan · 0.01 m
- 4:28 hUSA Territory · Midway Islands · 0.08 m
- 11:27 hFrench Polynesia · Nuku Hiva Island, Marquesas Islands · 0.09 m
- 20:29 hChile · Punta de Choros · 0.13 m
25 places with a documented arrival time
Observations by country
| Country | Observation records | Maximum documented water height | Deaths | Earliest arrival |
|---|---|---|---|---|
| Russia | 4 | 0.31 m Semjachik, Kamchatka | — | 0:37 h |
 United States | 20 | 0.28 m Kahului, Maui, Hi | — | 1:04 h |
 Chile | 5 | 0.18 m Coliumo | — | 20:29 h |
 French Polynesia | 1 | 0.09 m Nuku Hiva Island, Marquesas Islands | — | 11:27 h |
| USA Territory | 2 | 0.08 m Midway Islands | — | 4:28 h |
 Japan | 1 | 0.01 m D21413, SE Tokyo, Japan | — | 2:58 h |
Highest documented water heights
15 / 33Individual 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 |
|---|---|---|---|
| Semjachik, Kamchatka · Kamchatka | 0.31 m | 109 km | Russia |
| Nalychevo, Kamchatka · Kamchatka | 0.30 m | 86 km | Russia |
| Kahului, Maui, Hi · Hi | 0.28 m | 5,114 km | United States |
| Haleiwa, Oahu, Hi · Hi | 0.21 m | 4,955 km | United States |
| Crescent City, Ca · Ca | 0.19 m | 5,544 km | United States |
| Coliumo · Biobio | 0.18 m | 15,530 km | Chile |
| Hilo, Hawaii, Hi · Hi | 0.17 m | 5,305 km | United States |
| Punta de Choros · Coquimbo | 0.13 m | 15,059 km | Chile |
| Easter Island · Valparaiso (Isla de Pascua) | 0.12 m | 12,378 km | Chile |
| Waimanalo, Oahu, Hi · Hi | 0.12 m | 5,006 km | United States |
| Quintero · Valparaiso | 0.11 m | 15,339 km | Chile |
| Coquimbo · Coquimbo | 0.10 m | 15,125 km | Chile |
| Nuku Hiva Island, Marquesas Islands · Marquesas Islands | 0.09 m | 8,859 km | French Polynesia |
| Ala Wai Harbor, Oahu, Hi · Hi | 0.08 m | 4,998 km | United States |
| Amchitka, Ak · Ak | 0.08 m | 1,294 km | United States |
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.