WESS21 BABJ 020017

TSUNAMI BULLETIN NUMBER 2
ISSUED BY SOUTH CHINA SEA TSUNAMI ADVISORY CENTER (SCSTAC)
ISSUED 0016 UTC Apr 02 2026

  ...POTENTIAL TSUNAMI THREAT EXISTS FOR INDONESIA...

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THIS STATEMENT IS ISSUED FOR INFORMATION ONLY IN SUPPORT OF THE UNESCO/IOC SOUTH 
CHINA SEA SUB-REGIONAL TSUNAMI WARNING AND MITIGATION SYSTEM. NATIONAL AUTHORITIES 
WILL BE RESPONSIBLE FOR DETERMINATION OF THE APPROPRIATE LEVEL OF ALERT FOR EACH 
COUNTRY. THE PUBLIC SHOULD FOLLOW THE GUIDANCE OF NATIONAL AUTHORITIES.
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[ PRELIMINARY EARTHQUAKE PARAMETERS ]
  *MAGNITUDE        7.4
  *ORIGIN TIME      2248 UTC Apr 01 2026
  *COORDINATES      1.20 N,126.35 E
  *DEPTH            30 KM
  *LOCATION         NORTHERN MOLUCCA SEA

[ TSUNAMI OBSERVATIONS ]
     GAUGE NAME         REGION              COORDINATES                TIME(UTC)            MAX. AMPL(CM)
          KMMSI      Indonesia                125.1，1.4                     2317                       65
          BETSI      Indonesia                126.8，4.2                     2338                       15
          TBSSI      Indonesia                125.6，3.6                     2339                       13

  * MAX. AMPL - TSUNAMI AMPLITUDE MEASURED RELATIVE TO NORMAL SEA LEVEL.

[ EVALUATION ]
  THERE IS A POSSIBILITY OF A DESTRUCTIVE LOCAL TSUNAMI CONFINED TO 100-300 KM 
  OF THE EPICENTER BASED ON AVAILABLE INFORMATION. 

[ TSUNAMI AMPLITUDE AND ETA FORECASTS ]
      FORECAST POINT         COORDINATES            ETA(UTC)           MAX. AMPL
  --------------------------------------------------------------------------------
INDONESIA 
             JAILOLO          127.5, 1.1                2312              0.3-1M

  * THIS LIST IS GROUPED BY COUNTRIES, AND COUNTRY NAMES ARE ORDERED ACCORDING TO 
  THREAT LEVELS.
  * ETA - ESTIMATED TIME OF ARRIVAL OF THE INITIAL TSUNAMI WAVE. NOTING THAT IN SOME 
  COASTAL AREAS TSUNAMI WAVES MAY ARRIVE EARLIER THAN OUR ESTIMATE DUE TO COARSE 
  BATHYMETRY USED BY MODEL. 
  * MAX. AMPL - MAXIMUM WAVE HEIGHT RELATIVE TO NORMAL SEA LEVEL EXTRACTED 
  FROM MODEL RESULTS AND GROUPED INTO FOUR BINS OF <0.3 M, 0.3 TO 1 M, 
  1 TO 3 M and ABOVE 3 M. NOTING THAT THE INITIAL WAVE MAY NOT NECESSARILY BE THE 
  LARGEST, AND WAVE ACTIVITIES MAY VARY SIGNIFICANTLY ALONG COASTS DUE TO LOCAL FEATURES.

[ RECOMMENDED ACTIONS ]
  * LOCAL AUTHORITIES SHOULD PAY CLOSE ATTENTION TO THE EVALUATION OF THEIR NATIONAL 
  TSUNAMI WARNING CENTERS ON TSUNAMI HAZARD, AND TAKE APPROPRIATE ACTIONS IN 
  RESPONSE TO THIS POTENTIAL HAZARD.
  * PERSONS LOCATED IN THREATENED COASTAL AREAS SHOULD KEEP ALERT FOR WARNING 
  INFORMATION AND FOLLOW INSTRUCTIONS FROM LOCAL AUTHORITIES.

[ UPDATES ]
  THE NEXT BULLETIN WILL BE ISSUED AS MORE INFORMATION BECOMES AVAILABLE.

[ ADDITIONAL INFORMATION ]
  * MORE DETAILED INFORMATION CAN BE FOUND AT WEBSITE SCSTAC.OCEANGUIDE.ORG.CN OR BSCSTAC.HKO.GOV.HK.
  * TSUNAMI BULLETIN REGARDING THIS EVENT MAY BE ISSUED BY PACIFIC TSUNAMI WARNING 
  CENTER. IN CASE OF CONFLICTING INFORMATION, MORE CONSERVATIVE INFORMATION SHOULD 
  BE ADOPTED.
  * TEL: +86-10-62104561
  * EMAIL: TSU@NMEFC.CN
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