Tsunami Alerts (PTWC) from Pacific Tsunami Warning Center
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Tsunami Alerts (PTWC) from Pacific Tsunami Warning Center
@tsunamialertsptwc.bsky.social
Tsunami alerts from the PTWC for the Pacific region, including Hawaii.

US Coast/AK: @tsunamialertsntwc.bsky.social
Pacific/HI: @tsunamialertsptwc.bsky.social
#Earthquake
M6.7 earthquake OFF THE EAST COAST OF HONSHU JAPAN 18:44PST Dec 11 Depth 16km: Tsunami NOT expected

- Event details: Preliminary magnitude 6.7 (Mwp) earthquake / Lat: 40.900, Lon: 143.000 at 2025-12-12T02:44:13Z
December 12, 2025 at 2:56 AM
#Earthquake
M6.7 earthquake OFF THE EAST COAST OF HONSHU JAPAN 18:44PST Dec 11 Depth 16km: Tsunami NOT expected

Tsunami Info Bulletin issued by PTWC to its US and international AOR for large earthquakes in the Pacific Basin that ...
December 12, 2025 at 2:55 AM
#Earthquake
M7.6 earthquake HOKKAIDO JAPAN REGION 06:15PST Dec 8 Depth 51km: Tsunami possible

Tsunami Warning, Watch, and/or Advisory Bulletin issued by Pacific Tsunami Warning Center (PTWC) to its US and international AOR for confirmed or p...
December 8, 2025 at 5:28 PM
#Earthquake
M7.6 earthquake HOKKAIDO JAPAN REGION 06:15PST Dec 8 Depth 51km: Tsunami possible

Tsunami Warning, Watch, and/or Advisory Bulletin issued by Pacific Tsunami Warning Center (PTWC) to its US and international AOR for confirmed or p...
December 8, 2025 at 4:21 PM
#Earthquake
M7.6 earthquake HOKKAIDO JAPAN REGION 06:15PST Dec 8 Depth 51km: Tsunami possible

Tsunami Warning, Watch, and/or Advisory Bulletin issued by Pacific Tsunami Warning Center (PTWC) to its US and international AOR for confirmed or p...
December 8, 2025 at 3:10 PM
#Earthquake
M7.6 earthquake HOKKAIDO JAPAN REGION 06:15PST Dec 8 Depth 51km: Tsunami NOT expected

- Event details: Preliminary magnitude 7.6 (Mwp) earthquake / Lat: 41.000, Lon: 142.300 at 2025-12-08T14:15:09Z
December 8, 2025 at 2:44 PM
#Earthquake
M7.6 earthquake HOKKAIDO JAPAN REGION 06:15PST Dec 8 Depth 51km: Tsunami NOT expected

- Event details: Preliminary magnitude 7.6 (Mwp) earthquake / Lat: 41.000, Lon: 142.300 at 2025-12-08T14:15:09Z
December 8, 2025 at 2:35 PM
#Earthquake
M7.6 earthquake HOKKAIDO JAPAN REGION 06:15PST Dec 8 Depth 51km: Tsunami NOT expected

Tsunami Info Bulletin for large earthquakes in the Pacific Basin that are evaluated not to have destructive teletsunamigenic potential, or for larg...
December 8, 2025 at 2:33 PM
#Earthquake
M7.6 earthquake HOKKAIDO JAPAN REGION 06:15PST Dec 8 Depth 51km: Tsunami possible

Tsunami Warning, Watch, and/or Advisory Bulletin issued by Pacific Tsunami Warning Center (PTWC) to its US and international AOR for conf...
December 8, 2025 at 2:29 PM
#Earthquake
M7.0 earthquake SOUTHEASTERN ALASKA 12:42PST Dec 6 Depth 2km: Tsunami NOT expected

- Event details: Preliminary magnitude 7.0 (Mwp) earthquake / Lat: 60.400, Lon: -139.500 at 2025-12-06T20:42:00Z
December 6, 2025 at 8:51 PM
#Earthquake
M5.8 earthquake ABOUT 169 MILES SOUTHWEST OF SAVAII ISLAND 19:30PST Nov 27 Depth 284km: Tsunami NOT expected

- Event details: Preliminary magnitude 5.8 (Mwp) earthquake / Lat: -15.188, Lon: -174.668 at 2025-11-28T03:30:08Z
November 28, 2025 at 3:45 AM
#Earthquake
M4.6 earthquake ON THE SOUTH FLANK OF KILAUEA VOLCANO 01:49PST Nov 26 Depth 10km

Tsunami Info Bulletin for large earthquakes in the Pacific Basin that are evaluated not to have destructive teletsunamigenic potential, o...
November 26, 2025 at 9:53 AM
#Earthquake
M5.5 earthquake VICINITY OF GUAM 14:53PST Nov 9 Depth 102km: Tsunami NOT expected

- Event details: Preliminary magnitude 5.5 (Mww) earthquake / Lat: 13.620, Lon: 145.020 at 2025-11-09T22:53:38Z
November 9, 2025 at 11:09 PM
#Earthquake
M6.7 earthquake OFF THE EAST COAST OF HONSHU JAPAN 00:03PST Nov 9 Depth 10km: Tsunami NOT expected

- Event details: Preliminary magnitude 6.7 (Mwp) earthquake / Lat: 39.400, Lon: 143.500 at 2025-11-09T08:03:40Z
November 9, 2025 at 8:17 AM
#Earthquake
M6.7 earthquake OFF THE EAST COAST OF HONSHU JAPAN 00:03PST Nov 9 Depth 10km: Tsunami NOT expected

Tsunami Info Bulletin issued by PTWC to its US and international AOR for large earthquakes in the Pacific Basin that ...
November 9, 2025 at 8:16 AM
#Earthquake
M5.8 earthquake ABOUT 102 MILES SOUTHWEST OF GUAM 23:37PST Nov 3 Depth 107km: Tsunami NOT expected

- Event details: Preliminary magnitude 5.8 (Mwp) earthquake / Lat: 12.418, Lon: 143.423 at 2025-11-04T07:37:26Z
November 4, 2025 at 7:51 AM
#Earthquake
M6.1 earthquake LEEWARD ISLANDS 05:54PDT Oct 27 Depth 10km

TSUNAMI INFORMATION STATEMENT - Event details: Preliminary magnitude 6.1 (mb) earthquake / Lat: 16.515, Lon: -59.572 at 2025-10-27T12:54:59Z
October 27, 2025 at 1:18 PM
#Earthquake
M6.8 earthquake LEEWARD ISLANDS 05:38PDT Oct 27 Depth 10km: Tsunami NOT expected

Tsunami Info Bulletin for large earthquakes in the Gulf of Mexico, Caribbean and Atlantic areas of which magnitudes could affect the San Juan and Caribbean areas.
October 27, 2025 at 12:53 PM
#Earthquake
M6.8 earthquake LEEWARD ISLANDS 05:38PDT Oct 27 Depth 10km: Tsunami NOT expected

Tsunami Info Bulletin for large earthquakes in the Gulf of Mexico, Caribbean and Atlantic areas of which magnitudes could affect the San Juan and Caribbean areas.
October 27, 2025 at 12:50 PM
#Earthquake
M6.8 earthquake LEEWARD ISLANDS 05:38PDT Oct 27 Depth 0km

TSUNAMI INFORMATION STATEMENT - Event details: Preliminary magnitude 6.8 (Mwp) earthquake / Lat: 16.535, Lon: -59.494 at 2025-10-27T12:38:37Z
October 27, 2025 at 12:48 PM
#Earthquake
M6.7 earthquake PAPUA INDONESIA 22:48PDT Oct 15 Depth 70km: Tsunami NOT expected

- Event details: Preliminary magnitude 6.7 (Mwp) earthquake / Lat: -2.309, Lon: 138.858 at 2025-10-16T05:48:57Z
October 16, 2025 at 5:57 AM
#Earthquake
M6.6 earthquake DRAKE PASSAGE 18:42PDT Oct 15 Depth 10km: Tsunami NOT expected

- Event details: Preliminary magnitude 6.6 (Mwp) earthquake / Lat: -60.002, Lon: -61.701 at 2025-10-16T01:42:33Z
October 16, 2025 at 1:56 AM
#Earthquake
M6.6 earthquake DRAKE PASSAGE 18:42PDT Oct 15 Depth 10km: Tsunami NOT expected

- Event details: Preliminary magnitude 6.6 (Mwp) earthquake / Lat: -60.002, Lon: -61.701 at 2025-10-16T01:42:33Z
October 16, 2025 at 1:55 AM
#Earthquake
M7.6 earthquake DRAKE PASSAGE 13:29PDT Oct 10 Depth 14km: Tsunami possible

Tsunami Warning, Watch, and/or Advisory Bulletin issued by Pacific Tsunami Warning Center (PTWC) to its US and international AOR for confirmed or p...
October 10, 2025 at 10:21 PM
#Earthquake
M7.8 earthquake DRAKE PASSAGE 13:29PDT Oct 10 Depth 14km: Tsunami NOT expected

Tsunami Info Bulletin for large earthquakes in the Gulf of Mexico, Caribbean and Atlantic areas of which magnitudes could affect the San Juan and Caribbean areas.
October 10, 2025 at 8:54 PM