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M7.4 Earthquake hits Taiwan, setting off tsunami alerts

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  • Mary Wilson
    replied
    Magnitude 7.5 quake strikes Taiwan, triggering tsunami alert for Okinawa

    TV images show collapsed buildings in the eastern part of the island.

    By Taejun Kang for RFA
    2024.04.02
    Taipei, Taiwan​

    A magnitude 7.5 earthquake struck Taiwan on Wednesday morning, shaking buildings off their foundations and prompting Japan to issue a tsunami alert for its southern island of Okinawa.

    The epicenter of the quake, which struck at 7:58 a.m., was off the eastern coast of Taiwan, about 25 kilometers (15.5 miles) south-southeast of Hualien County Hall, at a depth of 15.5 kilometers, according to Taiwan’s Central Weather Administration, or CWA.

    TV broadcasters showed images of collapsed buildings in Hualien, reporting that people were trapped inside. ...

    VIDEO: https://www.rfa.org/english/news/chi...024212638.html

    Leave a comment:


  • Mary Wilson
    replied

    ZCZC
    WEPA40 PHEB 030110
    TSUPAC

    TSUNAMI MESSAGE NUMBER 3
    NWS PACIFIC TSUNAMI WARNING CENTER HONOLULU HI
    0108 UTC WED APR 3 2024

    ...PTWC TSUNAMI THREAT MESSAGE...


    **** NOTICE **** NOTICE **** NOTICE **** NOTICE **** NOTICE *****

    THIS MESSAGE IS ISSUED FOR INFORMATION ONLY IN SUPPORT OF THE
    UNESCO/IOC PACIFIC TSUNAMI WARNING AND MITIGATION SYSTEM AND IS
    MEANT FOR NATIONAL AUTHORITIES IN EACH COUNTRY OF THAT SYSTEM.

    NATIONAL AUTHORITIES WILL DETERMINE THE APPROPRIATE LEVEL OF
    ALERT FOR EACH COUNTRY AND MAY ISSUE ADDITIONAL OR MORE REFINED
    INFORMATION.

    **** NOTICE **** NOTICE **** NOTICE **** NOTICE **** NOTICE *****

    THE TSUNAMI FORECAST IS UNCHANGED IN THIS MESSAGE.


    PRELIMINARY EARTHQUAKE PARAMETERS
    ---------------------------------

    * MAGNITUDE 7.5
    * ORIGIN TIME 2358 UTC APR 2 2024
    * COORDINATES 23.8 NORTH 121.7 EAST
    * DEPTH 11 KM / 7 MILES
    * LOCATION TAIWAN


    EVALUATION
    ----------

    * AN EARTHQUAKE WITH A PRELIMINARY MAGNITUDE OF 7.5 OCCURRED IN
    TAIWAN AT 2358 UTC ON TUESDAY APRIL 2 2024.

    * TSUNAMI WAVES HAVE BEEN OBSERVED.

    * BASED ON ALL AVAILABLE DATA... HAZARDOUS TSUNAMI WAVES ARE
    FORECAST FOR SOME COASTS.


    TSUNAMI THREAT FORECAST
    -----------------------

    * TSUNAMI WAVES REACHING 1 TO 3 METERS ABOVE THE TIDE LEVEL ARE
    POSSIBLE ALONG SOME COASTS OF

    CHINA... AND TAIWAN.


    * TSUNAMI WAVES REACHING 0.3 TO 1 METERS ABOVE THE TIDE LEVEL
    ARE POSSIBLE FOR SOME COASTS OF

    JAPAN.


    * TSUNAMI WAVES ARE FORECAST TO BE LESS THAN 0.3 METERS ABOVE
    THE TIDE LEVEL FOR THE COASTS OF

    GUAM... INDONESIA... NORTHERN MARIANAS... PALAU...
    PHILIPPINES... REPUBLIC OF KOREA... VIETNAM... AND YAP.


    * ACTUAL AMPLITUDES AT THE COAST MAY VARY FROM FORECAST
    AMPLITUDES DUE TO UNCERTAINTIES IN THE FORECAST AND LOCAL
    FEATURES. IN PARTICULAR MAXIMUM TSUNAMI AMPLITUDES ON ATOLLS
    AND AT LOCATIONS WITH FRINGING OR BARRIER REEFS WILL LIKELY
    BE MUCH SMALLER THAN THE FORECAST INDICATES.

    * FOR OTHER AREAS COVERED BY THIS PRODUCT A FORECAST HAS NOT
    YET BEEN COMPUTED. THE FORECAST WILL BE EXPANDED IF
    NECESSARY IN SUBSEQUENT PRODUCTS.


    RECOMMENDED ACTIONS
    -------------------

    * GOVERNMENT AGENCIES RESPONSIBLE FOR THREATENED COASTAL AREAS
    SHOULD TAKE ACTION TO INFORM AND INSTRUCT ANY COASTAL
    POPULATIONS AT RISK IN ACCORDANCE WITH THEIR OWN
    EVALUATION... PROCEDURES AND THE LEVEL OF THREAT.

    * PERSONS LOCATED IN THREATENED COASTAL AREAS SHOULD STAY ALERT
    FOR INFORMATION AND FOLLOW INSTRUCTIONS FROM NATIONAL AND
    LOCAL AUTHORITIES.


    ESTIMATED TIMES OF ARRIVAL
    --------------------------

    * ESTIMATED TIMES OF ARRIVAL -ETA- OF THE INITIAL TSUNAMI WAVE
    FOR PLACES WITHIN THREATENED REGIONS ARE GIVEN BELOW. ACTUAL
    ARRIVAL TIMES MAY DIFFER AND THE INITIAL WAVE MAY NOT BE THE
    LARGEST. A TSUNAMI IS A SERIES OF WAVES AND THE TIME BETWEEN
    WAVES CAN BE FIVE MINUTES TO ONE HOUR.

    LOCATION REGION COORDINATES ETA(UTC)
    ------------------------------------------------------------
    TAITUNG TAIWAN 22.7N 121.2E 0017 04/03
    CHILUNG TAIWAN 25.2N 121.8E 0040 04/03
    KAOHSIUNG TAIWAN 22.5N 120.3E 0102 04/03
    OKINAWA JAPAN 26.2N 127.8E 0129 04/03
    HOMEL TAIWAN 24.2N 120.4E 0239 04/03
    WENZHOU CHINA 27.8N 121.2E 0329 04/03
    QUANZHOU CHINA 24.8N 118.8E 0351 04/03
    HONG KONG CHINA 22.3N 114.2E 0441 04/03


    POTENTIAL IMPACTS
    -----------------

    * A TSUNAMI IS A SERIES OF WAVES. THE TIME BETWEEN WAVE CRESTS
    CAN VARY FROM 5 MINUTES TO AN HOUR. THE HAZARD MAY PERSIST
    FOR MANY HOURS OR LONGER AFTER THE INITIAL WAVE.

    * IMPACTS CAN VARY SIGNIFICANTLY FROM ONE SECTION OF COAST TO
    THE NEXT DUE TO LOCAL BATHYMETRY AND THE SHAPE AND ELEVATION
    OF THE SHORELINE.

    * IMPACTS CAN ALSO VARY DEPENDING UPON THE STATE OF THE TIDE AT
    THE TIME OF THE MAXIMUM TSUNAMI WAVES.

    * PERSONS CAUGHT IN THE WATER OF A TSUNAMI MAY DROWN... BE
    CRUSHED BY DEBRIS IN THE WATER... OR BE SWEPT OUT TO SEA.


    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 NORMAL TIDE LEVEL.

    GAUGE TIME OF MAXIMUM WAVE
    COORDINATES MEASURE TSUNAMI PERIOD
    GAUGE LOCATION LAT LON (UTC) HEIGHT (MIN)
    -------------------------------------------------------------
    CHENGONG TW 23.1N 121.4E 0041 0.45M/ 1.5FT 18
    ISHIGAKIJIMA JP 24.3N 124.2E 0035 0.12M/ 0.4FT 12
    LONGDONG TW 25.1N 121.9E 0029 0.21M/ 0.7FT 06


    NEXT UPDATE AND ADDITIONAL INFORMATION
    --------------------------------------

    * THE NEXT MESSAGE WILL BE ISSUED IN ONE HOUR... OR SOONER IF
    THE SITUATION WARRANTS.

    * AUTHORITATIVE INFORMATION ABOUT THE EARTHQUAKE FROM THE U.S.
    GEOLOGICAL SURVEY CAN BE FOUND ON THE INTERNET AT
    EARTHQUAKE.USGS.GOV.

    * FURTHER INFORMATION ABOUT THIS EVENT MAY BE FOUND AT
    WWW.TSUNAMI.GOV.

    * COASTAL REGIONS OF HAWAII... AMERICAN SAMOA... GUAM... AND
    CNMI SHOULD REFER TO PACIFIC TSUNAMI WARNING CENTER MESSAGES
    SPECIFICALLY FOR THOSE PLACES THAT CAN BE FOUND AT
    WWW.TSUNAMI.GOV.

    * COASTAL REGIONS OF CALIFORNIA... OREGON... WASHINGTON...
    BRITISH COLUMBIA AND ALASKA SHOULD ONLY REFER TO U.S.
    NATIONAL TSUNAMI WARNING CENTER MESSAGES THAT CAN BE FOUND
    AT WWW.TSUNAMI.GOV.

    https://www.tsunami.gov/events/PHEB/...A40/WEPA40.txt

    Leave a comment:


  • Shiloh
    replied
    Source: https://tsunami.gov/events/PHEB/2024...A40/WEPA40.txt


    TSUNAMI MESSAGE NUMBER 3
    NWS PACIFIC TSUNAMI WARNING CENTER HONOLULU HI
    0108 UTC WED APR 3 2024

    ...PTWC TSUNAMI THREAT MESSAGE...


    **** NOTICE **** NOTICE **** NOTICE **** NOTICE **** NOTICE *****

    THIS MESSAGE IS ISSUED FOR INFORMATION ONLY IN SUPPORT OF THE
    UNESCO/IOC PACIFIC TSUNAMI WARNING AND MITIGATION SYSTEM AND IS
    MEANT FOR NATIONAL AUTHORITIES IN EACH COUNTRY OF THAT SYSTEM.

    NATIONAL AUTHORITIES WILL DETERMINE THE APPROPRIATE LEVEL OF
    ALERT FOR EACH COUNTRY AND MAY ISSUE ADDITIONAL OR MORE REFINED
    INFORMATION.

    **** NOTICE **** NOTICE **** NOTICE **** NOTICE **** NOTICE *****

    THE TSUNAMI FORECAST IS UNCHANGED IN THIS MESSAGE.


    PRELIMINARY EARTHQUAKE PARAMETERS
    ---------------------------------

    * MAGNITUDE 7.5
    * ORIGIN TIME 2358 UTC APR 2 2024
    * COORDINATES 23.8 NORTH 121.7 EAST
    * DEPTH 11 KM / 7 MILES
    * LOCATION TAIWAN


    EVALUATION
    ----------

    * AN EARTHQUAKE WITH A PRELIMINARY MAGNITUDE OF 7.5 OCCURRED IN
    TAIWAN AT 2358 UTC ON TUESDAY APRIL 2 2024.

    * TSUNAMI WAVES HAVE BEEN OBSERVED.

    * BASED ON ALL AVAILABLE DATA... HAZARDOUS TSUNAMI WAVES ARE
    FORECAST FOR SOME COASTS.


    TSUNAMI THREAT FORECAST
    -----------------------

    * TSUNAMI WAVES REACHING 1 TO 3 METERS ABOVE THE TIDE LEVEL ARE
    POSSIBLE ALONG SOME COASTS OF

    CHINA... AND TAIWAN.


    * TSUNAMI WAVES REACHING 0.3 TO 1 METERS ABOVE THE TIDE LEVEL
    ARE POSSIBLE FOR SOME COASTS OF

    JAPAN.


    * TSUNAMI WAVES ARE FORECAST TO BE LESS THAN 0.3 METERS ABOVE
    THE TIDE LEVEL FOR THE COASTS OF

    GUAM... INDONESIA... NORTHERN MARIANAS... PALAU...
    PHILIPPINES... REPUBLIC OF KOREA... VIETNAM... AND YAP.


    * ACTUAL AMPLITUDES AT THE COAST MAY VARY FROM FORECAST
    AMPLITUDES DUE TO UNCERTAINTIES IN THE FORECAST AND LOCAL
    FEATURES. IN PARTICULAR MAXIMUM TSUNAMI AMPLITUDES ON ATOLLS
    AND AT LOCATIONS WITH FRINGING OR BARRIER REEFS WILL LIKELY
    BE MUCH SMALLER THAN THE FORECAST INDICATES.

    * FOR OTHER AREAS COVERED BY THIS PRODUCT A FORECAST HAS NOT
    YET BEEN COMPUTED. THE FORECAST WILL BE EXPANDED IF
    NECESSARY IN SUBSEQUENT PRODUCTS.


    RECOMMENDED ACTIONS
    -------------------

    * GOVERNMENT AGENCIES RESPONSIBLE FOR THREATENED COASTAL AREAS
    SHOULD TAKE ACTION TO INFORM AND INSTRUCT ANY COASTAL
    POPULATIONS AT RISK IN ACCORDANCE WITH THEIR OWN
    EVALUATION... PROCEDURES AND THE LEVEL OF THREAT.

    * PERSONS LOCATED IN THREATENED COASTAL AREAS SHOULD STAY ALERT
    FOR INFORMATION AND FOLLOW INSTRUCTIONS FROM NATIONAL AND
    LOCAL AUTHORITIES.


    ESTIMATED TIMES OF ARRIVAL
    --------------------------

    * ESTIMATED TIMES OF ARRIVAL -ETA- OF THE INITIAL TSUNAMI WAVE
    FOR PLACES WITHIN THREATENED REGIONS ARE GIVEN BELOW. ACTUAL
    ARRIVAL TIMES MAY DIFFER AND THE INITIAL WAVE MAY NOT BE THE
    LARGEST. A TSUNAMI IS A SERIES OF WAVES AND THE TIME BETWEEN
    WAVES CAN BE FIVE MINUTES TO ONE HOUR.

    LOCATION REGION COORDINATES ETA(UTC)
    ------------------------------------------------------------
    TAITUNG TAIWAN 22.7N 121.2E 0017 04/03
    CHILUNG TAIWAN 25.2N 121.8E 0040 04/03
    KAOHSIUNG TAIWAN 22.5N 120.3E 0102 04/03
    OKINAWA JAPAN 26.2N 127.8E 0129 04/03
    HOMEL TAIWAN 24.2N 120.4E 0239 04/03
    WENZHOU CHINA 27.8N 121.2E 0329 04/03
    QUANZHOU CHINA 24.8N 118.8E 0351 04/03
    HONG KONG CHINA 22.3N 114.2E 0441 04/03


    POTENTIAL IMPACTS
    -----------------

    * A TSUNAMI IS A SERIES OF WAVES. THE TIME BETWEEN WAVE CRESTS
    CAN VARY FROM 5 MINUTES TO AN HOUR. THE HAZARD MAY PERSIST
    FOR MANY HOURS OR LONGER AFTER THE INITIAL WAVE.

    * IMPACTS CAN VARY SIGNIFICANTLY FROM ONE SECTION OF COAST TO
    THE NEXT DUE TO LOCAL BATHYMETRY AND THE SHAPE AND ELEVATION
    OF THE SHORELINE.

    * IMPACTS CAN ALSO VARY DEPENDING UPON THE STATE OF THE TIDE AT
    THE TIME OF THE MAXIMUM TSUNAMI WAVES.

    * PERSONS CAUGHT IN THE WATER OF A TSUNAMI MAY DROWN... BE
    CRUSHED BY DEBRIS IN THE WATER... OR BE SWEPT OUT TO SEA.


    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 NORMAL TIDE LEVEL.

    GAUGE TIME OF MAXIMUM WAVE
    COORDINATES MEASURE TSUNAMI PERIOD
    GAUGE LOCATION LAT LON (UTC) HEIGHT (MIN)
    -------------------------------------------------------------
    CHENGONG TW 23.1N 121.4E 0041 0.45M/ 1.5FT 18
    ISHIGAKIJIMA JP 24.3N 124.2E 0035 0.12M/ 0.4FT 12
    LONGDONG TW 25.1N 121.9E 0029 0.21M/ 0.7FT 06


    NEXT UPDATE AND ADDITIONAL INFORMATION
    --------------------------------------

    * THE NEXT MESSAGE WILL BE ISSUED IN ONE HOUR... OR SOONER IF
    THE SITUATION WARRANTS.

    * AUTHORITATIVE INFORMATION ABOUT THE EARTHQUAKE FROM THE U.S.
    GEOLOGICAL SURVEY CAN BE FOUND ON THE INTERNET AT
    EARTHQUAKE.USGS.GOV.

    * FURTHER INFORMATION ABOUT THIS EVENT MAY BE FOUND AT
    WWW.TSUNAMI.GOV.

    * COASTAL REGIONS OF HAWAII... AMERICAN SAMOA... GUAM... AND
    CNMI SHOULD REFER TO PACIFIC TSUNAMI WARNING CENTER MESSAGES
    SPECIFICALLY FOR THOSE PLACES THAT CAN BE FOUND AT
    WWW.TSUNAMI.GOV.

    * COASTAL REGIONS OF CALIFORNIA... OREGON... WASHINGTON...
    BRITISH COLUMBIA AND ALASKA SHOULD ONLY REFER TO U.S.
    NATIONAL TSUNAMI WARNING CENTER MESSAGES THAT CAN BE FOUND
    AT WWW.TSUNAMI.GOV.

    $$



    NNNN​

    Leave a comment:


  • Shiloh
    started a topic M7.4 Earthquake hits Taiwan, setting off tsunami alerts

    M7.4 Earthquake hits Taiwan, setting off tsunami alerts

    Source: https://www.bbc.com/news/world-asia-68719996

    Earthquake hits Taiwan, setting off tsunami alerts
    7 minutes ago​

    A 7.4 magnitude earthquake struck off Taiwan's east coast on Wednesday, setting off tsunami warnings on the island and its neighbouring countries.

    The epicentre is located about 18km (11mi) south of Taiwan's Hualien city, according to the US Geological Survey.

    Tsunami waves of up to 3m were expected to reach large areas of Japan's southwestern coast, said the Japan Meteorological Agency.

    The Philippines' seismology agency has also issued a tsunami warning.​..
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