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WEPA40 RJTD 181943

TSUNAMI BULLETIN NUMBER 002

   ISSUED BY NWPTAC(JMA)

   ISSUED AT 1943Z 18 SEP 2025

PART 01 OF 01 PARTS



HYPOCENTRAL PARAMETERS (REVISION)

ORIGIN TIME:1858Z 18 SEP 2025

PRELIMINARY EPICENTER:LAT53.0NORTH LON160.8EAST

 NEAR EAST COAST OF KAMCHATKA

 JAPAN - KURIL ISLANDS - KAMCHATKA PENINSULA

MAG:7.7 (MW)



EVALUATION

 THERE IS A POSSIBILITY OF A DESTRUCTIVE REGIONAL TSUNAMI



THIS BULLETIN IS FOR

EAST COASTS OF KAMCHATKA PENINSULA



ESTIMATED TSUNAMI ARRIVAL TIMES AND WAVE AMPLITUDES

EAST COASTS OF KAMCHATKA PENINSULA

 LOCATION              COORDINATES  ARRIVAL TIME  AMPL

 PETROPAVLOVSK_K       53.2N 159.6E 1916Z 18 SEP  5-10M (REVISION)

 NIKOLSKOYA            55.1N 165.7E 1926Z 18 SEP  0.3-1M (REVISION)



AMPL - MAXIMUM AMPLITUDE IN METERS FROM THE

UNDISTURBED SEA LEVEL TO THE CREST



IN SOME COASTAL AREAS (PARTICULARLY NEAR THE EPICENTER),

TSUNAMI WAVES MAY BE HIGHER AND/OR ARRIVE EARLIER THAN

ESTIMATED FOR NEARBY FORECAST POINTS.

AUTHORITIES SHOULD BE AWARE OF THIS POSSIBILITY.



THE EVALUATION OF TSUNAMIGENIC POTENTIAL AND ESTIMATED

ARRIVAL TIMES FOR TSUNAMI WAVES MAY ALSO DIFFER FROM

THOSE OF PTWC DUE TO DIFFERENCES IN ESTIMATED EARTHQUAKE

PARAMETERS AND THE TSUNAMI FORECAST MODEL.

AUTHORITIES SHOULD REFER TO EARLIER ARRIVAL TIMES

FOR GREATEST SAFETY.



THIS WILL BE THE FINAL BULLETIN UNLESS CHANGES IN THE POTENTIAL

FOR TSUNAMI GENERATION ARE DEEMED POSSIBLE BASED ON EARTHQUAKE

RE-EVALUATION OR REPORTS INDICATING TSUNAMI OBSERVATION ARE

RECEIVED.



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