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    sonicbomb.com :: View topic - Massive Chilean Earthquake

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    Blake
    Tewa (5 mt)


    Joined: Jun 25, 2007
    Posts: 680
    Location: Florida

    PostPosted: Sat Feb 27, 2010 5:39 pm Reply with quote

    Seismograph Plot


    South American Monitor

    Tectonic Summary
    This earthquake occurred at the boundary between the Nazca and South American tectonic plates. The two plates are converging at a rate of 80 mm per year. The earthquake occurred as thrust-faulting on the interface between the two plates, with the Nazca plate moving down and landward below the South American plate.

    Coastal Chile has a history of very large earthquakes. Since 1973, there have been 13 events of magnitude 7.0 or greater. The February 27 shock originated about 230 km north of the source region of the magnitude 9.5 earthquake of May, 1960 the largest earthquake worldwide in the last 200 years or more. This giant earthquake spawned a tsunami that engulfed the Pacific Ocean. An estimated 1600 lives were lost to the 1960 earthquake and tsunami in Chile, and the 1960 tsunami took another 200 lives among Japan, Hawaii, and the Philippines. Approximately 870 km to the north of the February 27 earthquake is the source region of the magnitude 8.5 earthquake of November, 1922. This great quake significantly impacted central Chile, killing several hundred people and causing severe property damage. The 1922 quake generated a 9-meter local tsunami that inundated the Chile coast near the town of Coquimbo; the tsunami also crossed the Pacific, washing away boats in Hilo harbor, Hawaii. The magnitude 8.8 earthquake of February 27, 2010 ruptured the portion of the South American subduction zone separating these two massive historical earthquakes.

    A large vigorous aftershock sequence can be expected from this earthquake.



    BULLETIN
    TSUNAMI MESSAGE NUMBER 11
    NWS PACIFIC TSUNAMI WARNING CENTER EWA BEACH HI
    549 AM HST SAT FEB 27 2010

    TO - CIVIL DEFENSE IN THE STATE OF HAWAII

    SUBJECT - TSUNAMI WARNING SUPPLEMENT

    A TSUNAMI WARNING CONTINUES IN EFFECT FOR THE STATE OF HAWAII.

    AN EARTHQUAKE HAS OCCURRED WITH THESE PRELIMINARY PARAMETERS

    ORIGIN TIME - 0834 PM HST 26 FEB 2010
    COORDINATES - 36.1 SOUTH 72.6 WEST
    LOCATION - NEAR COAST OF CENTRAL CHILE
    MAGNITUDE - 8.8 MOMENT
    MAGNITUDE - 8.4 RICHTER (MS)

    MEASUREMENTS OR REPORTS OF TSUNAMI WAVE ACTIVITY

    GAUGE LOCATION LAT LON TIME AMPL PER
    ------------------- ----- ------ ----- --------------- -----
    QUEPOS CR 0.0N 9.4E 1416Z 0.24M / 0.8FT 52MIN
    BALTRA GALAPAGS EC 0.4S 90.3W 1452Z 0.35M / 1.2FT 14MIN
    DART MARQUESAS 5140 8.5S 125.0W 1519Z 0.28M / 0.9FT 48MIN
    EASTER CL 27.2S 109.5W 1205Z 0.35M / 1.1FT 52MIN
    ANCUD CL 41.9S 73.8W 0838Z 0.62M / 2.0FT 84MIN
    CALLAO LA-PUNTA PE 12.1S 77.2W 1029Z 0.36M / 1.2FT 30MIN
    ARICA CL 18.5S 70.3W 1008Z 0.94M / 3.1FT 42MIN
    IQUIQUE CL 20.2S 70.1W 0907Z 0.28M / 0.9FT 68MIN
    ANTOFAGASTA CL 23.2S 70.4W 0941Z 0.49M / 1.6FT 52MIN
    CALDERA CL 27.1S 70.8W 0843Z 0.45M / 1.5FT 20MIN
    TALCAHUANO CL 36.7S 73.4W 0653Z 2.34M / 7.7FT 88MIN
    COQUIMBO CL 30.0S 71.3W 0852Z 1.32M / 4.3FT 30MIN
    CORRAL CL 39.9S 73.4W 0739Z 0.90M / 2.9FT 16MIN
    SAN FELIX CL 26.3S 80.1W 0815Z 0.53M / 1.7FT 08MIN
    VALPARAISO CL 33.0S 71.6W 0708Z 1.29M / 4.2FT 20MIN

    LAT - LATITUDE (N-NORTH, S-SOUTH)
    LON - LONGITUDE (E-EAST, W-WEST)
    TIME - TIME OF THE MEASUREMENT (Z IS UTC IS GREENWICH TIME)
    AMPL - TSUNAMI AMPLITUDE MEASURED RELATIVE TO NORMAL SEA LEVEL.
    IT IS ...NOT... CREST-TO-TROUGH WAVE HEIGHT.
    VALUES ARE GIVEN IN BOTH METERS(M) AND FEET(FT).
    PER - PERIOD OF TIME IN MINUTES(MIN) FROM ONE WAVE TO THE NEXT.

    EVALUATION

    A TSUNAMI HAS BEEN GENERATED THAT COULD CAUSE DAMAGE ALONG
    COASTLINES OF ALL ISLANDS IN THE STATE OF HAWAII. URGENT ACTION
    SHOULD BE TAKEN TO PROTECT LIVES AND PROPERTY.

    A TSUNAMI IS A SERIES OF LONG OCEAN WAVES. EACH INDIVIDUAL WAVE
    CREST CAN LAST 5 TO 15 MINUTES OR MORE AND EXTENSIVELY FLOOD
    COASTAL AREAS. THE DANGER CAN CONTINUE FOR MANY HOURS AFTER THE
    INITIAL WAVE AS SUBSEQUENT WAVES ARRIVE. TSUNAMI WAVE HEIGHTS
    CANNOT BE PREDICTED AND THE FIRST WAVE MAY NOT BE THE LARGEST.
    TSUNAMI WAVES EFFICIENTLY WRAP AROUND ISLANDS. ALL SHORES ARE AT
    RISK NO MATTER WHICH DIRECTION THEY FACE. THE TROUGH OF A TSUNAMI
    WAVE MAY TEMPORARILY EXPOSE THE SEAFLOOR BUT THE AREA WILL
    QUICKLY FLOOD AGAIN. EXTREMELY STRONG AND UNUSUAL NEARSHORE
    CURRENTS CAN ACCOMPANY A TSUNAMI. DEBRIS PICKED UP AND CARRIED
    BY A TSUNAMI AMPLIFIES ITS DESTRUCTIVE POWER. SIMULTANEOUS HIGH
    TIDES OR HIGH SURF CAN SIGNIFICANTLY INCREASE THE TSUNAMI HAZARD.

    THE ESTIMATED ARRIVAL TIME IN HAWAII OF THE FIRST TSUNAMI WAVE IS

    1119 AM HST SAT 27 FEB 2010

    MESSAGES WILL BE ISSUED HOURLY OR SOONER AS CONDITIONS WARRANT.



    Tsunami Animation



    Added:

    LIVE FEED
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    Baikal
    Guest





    PostPosted: Tue Mar 02, 2010 7:19 pm Reply with quote

    Chile is devastated by the earthquake and tsunami. So far been found about 800 dead. The bridges have collapsed and most of the roads are unusable. The resources are transmitted by air to the affected areas.
    I live luckyly far from the zone of disaster.

    As I know ocean waves have arrived to Hawaii, Japan and Australia.
    Blake
    Tewa (5 mt)


    Joined: Jun 25, 2007
    Posts: 680
    Location: Florida

    PostPosted: Wed Mar 03, 2010 4:30 am Reply with quote

    Baikal wrote:
    Chile is devastated by the earthquake and tsunami. So far been found about 800 dead. The bridges have collapsed and most of the roads are unusable. The resources are transmitted by air to the affected areas.
    I live luckyly far from the zone of disaster.

    As I know ocean waves have arrived to Hawaii, Japan and Australia.



    Thankfully for most other countries hit by the tsunami, the waves turned out to be smaller than they could have been.


    Other interesting result of the earthquake. Story
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