Tsunami Watch/Warning
Issued by NWS Tiyan, Guam
Issued by NWS Tiyan, Guam
205
WEGM40 PHEB 300839
TSUGUM
GUZ001>004-301039-
/O.CAN.PHEB.TS.Y.0001.000000T0000Z-000000T0000Z/
BULLETIN
TSUNAMI MESSAGE NUMBER 9
NWS PACIFIC TSUNAMI WARNING CENTER HONOLULU HI
639 PM CHST WED JUL 30 2025
...THE TSUNAMI ADVISORY IS NOW CANCELED FOR GUAM AND CNMI...
THIS MESSAGE CONTAINS REVISED ALERT LEVELS.
AUDIENCE
--------
EMERGENCY MANAGERS... MEDIA... GENERAL PUBLIC
EVALUATION
----------
* AN EARTHQUAKE WITH A PRELIMINARY MAGNITUDE OF 8.8 OCCURRED
OFF THE EAST COAST OF KAMCHATKA, RUSSIA AT 925 AM CHST ON
WEDNESDAY JULY 30 2025.
* BASED ON ALL AVAILABLE DATA... THERE IS NO FURTHER TSUNAMI
THREAT TO GUAM... ROTA... TINIAN OR SAIPAN FROM THIS
EARTHQUAKE ALTHOUGH MINOR SEA LEVEL FLUCTUATIONS MAY
CONTINUE.
RECOMMENDED ACTIONS
-------------------
* FOLLOW INSTRUCTIONS AS THEY ARE GIVEN BY GOVERNMENT AGENCIES.
* BE OBSERVANT AND EXERCISE NORMAL CAUTION IF YOU ARE NEAR OR
IN THE OCEAN.
* OTHERWISE... NO FURTHER ACTION IS REQUIRED.
TSUNAMI OBSERVATIONS
--------------------
* THE FOLLOWING ARE TSUNAMI WAVE OBSERVATIONS FROM COASTAL
AND/OR DEEP-OCEAN SEA LEVEL GAUGES AT THE INDICATED
LOCATIONS. THE MAXIMUM TSUNAMI HEIGHT IS MEASURED WITH
RESPECT TO THE TIDE LEVEL.
GAUGE TIME OF MAXIMUM WAVE
COORDINATES MEASURE TSUNAMI PERIOD
GAUGE LOCATION LAT LON (CHST) HEIGHT (MIN)
-------------------------------------------------------------
HONOKOHAU HI USA 19.7N 156.0W 841 PM 0.4FT/ 0.1M 10
KAWAIHAE HAWAII 20.0N 155.8W 819 PM 1.2FT/ 0.4M 14
DEKEHTIK POHNPEI FM 7.0N 158.2E 734 PM 0.3FT/ 0.1M 20
DART 52402 11.9N 153.9E 607 PM 0.2FT/ 0.1M 44
KAUNAKAKAI US 21.1N 157.0W 720 PM 0.8FT/ 0.2M 30
PAGO BAY GUAM US 13.4N 144.8E 807 PM 0.5FT/ 0.1M 10
HONOLULU OAHU 21.3N 157.9W 758 PM 1.1FT/ 0.3M 16
KAHULUI MAUI 20.9N 156.5W 709 PM 5.7FT/ 1.7M 34
DUTCH HBR UNALASKA 53.9N 166.5W 506 PM 1.0FT/ 0.3M 72
ATKA AK 52.2N 174.2W 530 PM 1.8FT/ 0.6M 38
NIKOLSKI AK 52.9N 168.9W 648 PM 1.3FT/ 0.4M 42
BARBERS PT HI 21.3N 158.1W 738 PM 0.6FT/ 0.2M 04
HEEIA HI USA 21.4N 157.8W 658 PM 0.4FT/ 0.1M 20
WAKKANI JP 45.4N 141.7E 710 PM 0.8FT/ 0.2M 56
PORT ALLEN HI USA 21.9N 159.6W 730 PM 1.4FT/ 0.4M 10
CHICHIJIMA JP 27.1N 142.2E 727 PM 1.6FT/ 0.5M 18
WAIANAE HI USA 21.5N 158.2W 722 PM 1.2FT/ 0.4M 10
HILO HAWAII 19.7N 155.1W 723 PM 4.9FT/ 1.5M 14
HANALEI HI 22.2N 159.5W 648 PM 3.9FT/ 1.2M 12
KEEHI HI USA 21.3N 157.9W 712 PM 0.6FT/ 0.2M 34
MAKAPU`U HI 21.3N 157.7W 704 PM 2.3FT/ 0.7M 14
HALEIWA HI 21.6N 158.1W 648 PM 4.0FT/ 1.2M 12
NAWILIWILI KAUAI 22.0N 159.4W 636 PM 0.8FT/ 0.2M 14
NAWILIWILI HI 22.0N 159.4W 637 PM 0.7FT/ 0.2M 12
HANALEI HI USA 22.2N 159.5W 633 PM 3.0FT/ 0.9M 20
WAKE US 19.3N 166.6E 450 PM 0.7FT/ 0.2M 14
MERA JP 34.9N 139.8E 610 PM 1.1FT/ 0.3M 24
APRA HARBOR GUAM US 13.4N 144.7E 542 PM 0.4FT/ 0.1M 56
SAIPAN US 15.2N 145.7E 556 PM 0.7FT/ 0.2M 60
MIDWAY 28.2N 177.4W 500 PM 3.1FT/ 1.0M 08
HANASAKI HOKKAIDO J 43.3N 145.6E 258 PM 1.0FT/ 0.3M 58
DART 46413 48.0N 174.2W 244 PM 0.6FT/ 0.2M 40
KUSHIRO JP 43.0N 144.4E 221 PM 1.1FT/ 0.3M 76
DART 21415 50.2N 171.9E 217 PM 0.6FT/ 0.2M 08
DART 21414 49.0N 178.2E 203 PM 0.9FT/ 0.3M 32
DART 21416 48.1N 163.5E 103 PM 3.0FT/ 0.9M 24
POTENTIAL IMPACTS
-----------------
* MINOR SEA LEVEL FLUCTUATIONS MAY CONTINUE OVER THE NEXT FEW
HOURS.
PRELIMINARY EARTHQUAKE PARAMETERS
---------------------------------
* MAGNITUDE 8.8
* ORIGIN TIME 925 AM CHST JUL 30 2025
* COORDINATES 52.2 NORTH 160.0 EAST
* DEPTH 46 MILES
* LOCATION OFF THE EAST COAST OF KAMCHATKA RUSSIA
NEXT UPDATE AND ADDITIONAL INFORMATION
--------------------------------------
* THIS WILL BE THE FINAL STATEMENT ISSUED FOR THIS EVENT UNLESS
NEW INFORMATION IS RECEIVED OR THE SITUATION CHANGES.
* FURTHER INFORMATION ABOUT THIS EVENT MAY BE FOUND ON THE
INTERNET AT WWW.TSUNAMI.GOV.
* AUTHORITATIVE INFORMATION ABOUT THE EARTHQUAKE FROM THE U.S.
GEOLOGICAL SURVEY CAN BE FOUND ON THE INTERNET AT
EARTHQUAKE.USGS.GOV.
$$