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Posts Tagged ‘sumatra tsunami’

M8.2 Aftershock Follows Mega Quake Off Sumatra

Posted by feww on April 11, 2012

Large aftershock strikes Off the Coast of Sumatra

More than a dozen significant aftershocks have occurred off the coast of Sumatra, the largest of which measured 8.2Mw, according to USGS/EHP.


Earthquake Location Map. Source: USGS. Map enhanced by FIRE-EARTH

EQ Details

  • Magnitude 8.2
  • Date-Time:  Wednesday, April 11, 2012 at 10:43:09 UTC
  • Location: 0.773°N, 92.452°E
  • Depth: 16.4 km (10.2 miles)
  • Distances:
    • 618 km (384 miles) SSW of Banda Aceh, Sumatra, Indonesia
    • 712 km (442 miles) W of Sibolga, Sumatra, Indonesia
    • 1,062 km (659 miles) WSW of KUALA LUMPUR, Malaysia
    • 1,773 km (1,101 miles) WNW of JAKARTA, Java, Indonesia
  • Location Uncertainty horizontal +/- 14.2 km (8.8 miles); depth +/- 6.4 km (4.0 miles)
  • Source:  USGS NEIC (WDCS-D)

Tsunami Alert

TSUNAMI BULLETIN NUMBER 005
PACIFIC TSUNAMI WARNING CENTER/NOAA/NWS
ISSUED AT 1151Z 11 APR 2012

THIS BULLETIN IS FOR ALL AREAS OF THE INDIAN OCEAN.

... AN INDIAN-OCEAN-WIDE TSUNAMI WATCH IS IN EFFECT ...

... A MAJOR AFTERSHOCK OCCURRED AT 1043Z WITH MAGNITUDE 8.3 ...

... THE WATCH AREA IS NOW REDUCED ...

A TSUNAMI WATCH IS IN EFFECT FOR

 INDONESIA / INDIA / SRI LANKA / MALDIVES / UNITED KINGDOM

THIS BULLETIN IS ISSUED AS ADVICE TO GOVERNMENT AGENCIES.  ONLY
NATIONAL AND LOCAL GOVERNMENT AGENCIES HAVE THE AUTHORITY TO MAKE
DECISIONS REGARDING THE OFFICIAL STATE OF ALERT IN THEIR AREA AND
ANY ACTIONS TO BE TAKEN IN RESPONSE.

AN EARTHQUAKE HAS OCCURRED WITH THESE PRELIMINARY PARAMETERS

 ORIGIN TIME -  0839Z 11 APR 2012
 COORDINATES -   2.3 NORTH   93.1 EAST
 LOCATION    -  OFF W COAST OF NORTHERN SUMATRA
 MAGNITUDE   -  8.7

MEASUREMENTS OR REPORTS OF TSUNAMI WAVE ACTIVITY

 GAUGE LOCATION        LAT   LON    TIME        AMPL         PER
 -------------------  ----- ------  -----  ---------------  -----
 TRINCONMALEE LK       8.6N  81.2E  1116Z   0.04M /  0.1FT  18MIN
 COCOS ISLAND AU      12.1S  96.9E  1102Z   0.08M /  0.3FT  18MIN
 TELUKDALAM ID         0.6N  97.8E  1045Z   0.19M /  0.6FT  10MIN
 SABANG ID             5.8N  95.3E  1010Z   0.36M /  1.2FT  06MIN
 MEULABOH ID           4.1N  96.1E  1007Z   1.06M /  3.5FT  12MIN
 DART 23401            8.9N  88.5E  0956Z   0.03M /  0.1FT  06MIN

 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.

 NOTE - DART MEASUREMENTS ARE FROM THE DEEP OCEAN AND THEY
        ARE GENERALLY MUCH SMALLER THAN WOULD BE COASTAL
         MEASUREMENTS AT SIMILAR LOCATIONS.

EVALUATION

 SEA LEVEL READINGS INDICATE A TSUNAMI WAS GENERATED. IT MAY
 ALREADY HAVE BEEN DESTRUCTIVE ALONG SOME COASTS.

 BASED ON THESE DATA THE THREAT CONTINUES FOR ALL COASTAL AREAS OF
 THE INDIAN OCEAN. FOR THOSE AREAS - WHEN NO MAJOR WAVES HAVE
 OCCURRED FOR AT LEAST TWO HOURS AFTER THE ESTIMATED ARRIVAL TIME
 OR DAMAGING WAVES HAVE NOT OCCURRED FOR AT LEAST TWO HOURS THEN
 LOCAL AUTHORITIES CAN ASSUME THE THREAT IS PASSED. DANGER TO
 BOATS AND COASTAL STRUCTURES CAN CONTINUE FOR SEVERAL HOURS DUE
 TO RAPID CURRENTS.  AS LOCAL CONDITIONS CAN CAUSE A WIDE
 VARIATION IN TSUNAMI WAVE ACTION THE ALL CLEAR DETERMINATION MUST
 BE MADE BY LOCAL AUTHORITIES.

ESTIMATED INITIAL TSUNAMI WAVE ARRIVAL TIMES AT FORECAST POINTS
WITHIN THE WARNING AND WATCH AREAS 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
SUCCESSIVE WAVES CAN BE FIVE MINUTES TO ONE HOUR.

 LOCATION         FORECAST POINT     COORDINATES     ARRIVAL TIME
 --------------------------------    ------------    ------------
 INDONESIA        SIMEULUE            2.5N  96.0E    0912Z 11 APR
                  BANDA_ACEH          5.5N  95.1E    0933Z 11 APR
                  SIBERUT             1.5S  98.7E    0944Z 11 APR
                  PADANG              0.9S 100.1E    1025Z 11 APR
                  BENGKULU            3.9S 102.0E    1037Z 11 APR
                  CILACAP             7.8S 108.9E    1150Z 11 APR
                  BANDAR_LAMPUNG      5.7S 105.3E    1200Z 11 APR
                  BALI                8.7S 115.3E    1234Z 11 APR
                  BELAWAN             3.8N  98.8E    1326Z 11 APR
                  KUPANG             10.0S 123.4E    1333Z 11 APR
                  BALI                8.7S 115.3E    1234Z 11 APR
 INDIA            GREAT_NICOBAR       7.1N  93.6E    0937Z 11 APR
                  LITTLE_ANDAMAN     10.7N  92.3E    1015Z 11 APR
                  NORTH_ANDAMAN      13.3N  92.6E    1045Z 11 APR
                  PORT_BLAIR         11.9N  92.7E    1050Z 11 APR
                  CHENNAI            13.4N  80.4E    1134Z 11 APR
                  TRIVANDRUM          8.3N  76.9E    1204Z 11 APR
                  KAKINADA           17.2N  82.7E    1204Z 11 APR
                  MANGALORE          13.3N  74.4E    1339Z 11 APR
                  BOMBAY             18.8N  72.6E    1605Z 11 APR
                  GULF_OF_KUTCH      22.7N  68.9E    1636Z 11 APR
 SRI LANKA        TRINCOMALEE         8.7N  81.3E    1049Z 11 APR
                  DONDRA_HEAD         5.9N  80.6E    1054Z 11 APR
                  COLOMBO             6.9N  79.8E    1121Z 11 APR
                  JAFFNA              9.9N  80.0E    1235Z 11 APR
 MALDIVES         GAN                 0.6S  73.2E    1144Z 11 APR
                  MALE                4.2N  73.6E    1149Z 11 APR
                  MINICOV             8.3N  73.0E    1214Z 11 APR
 UNITED KINGDOM   DIEGO_GARCIA        7.3S  72.4E    1202Z 11 APR

Related Links

Global Disasters: Links, Forecasts and Background

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Tsunami Claims 200 After 7.7Mw Quake Strikes Indonesia

Posted by feww on October 26, 2010

At Least 200 Dead or Missing After Tsunami Created by Powerful Quake Destroys Villages Off Western Indonesia

At least 10 villages were obliterated by a 3-m high tsunami created after a 7.7Mw quake struck off the Mentawai islands, Sumatra, western Indonesia.

A huge white wave which was created by the quake washed away  just about everything in sight, eyewitnesses said.

At least 25 people are confirmed dead with about 170 others [local officials say at least 380 people] reported  as missing.


Earthquake Location Map. Source: USGS-EHP. Enhanced by Fire-Earth.

Mount Merapi Erupts

Meanwhile  the volatile Mount Merapi volcano began erupting Tuesday after rumbling for about 24 hours.

State vulcanologists believe that the pressure buildup withing Merapi could lead to powerful explosions.

About 40,000 people living on the slopes of the volcano have been evacuated.


Mount Merapi rumbled for many hours before spewing smoke on Tuesday. Photo shows volcano from Balerante, Central Java, Indonesia. Merapi last erupted in 2006. About 1,400 people have been killed as a result of 3 previous eruptions since 1930. Image Credit: AP. Caption: Fire-Earth.

New Zealand Earthquake Forecast:

Fire-Earth Moderators believe a large earthquake measuring about 8.8Mw could strike New Zealand Region.

Earthquake Details

  • Magnitude: 7.7
  • Date-Time:
    • Monday, October 25, 2010 at 14:42:22 UTC
    • Monday, October 25, 2010 at 09:42:22 PM at epicenter
  • Location: 3.484°S, 100.114°E
  • Depth: 20.6 km
  • Region: KEPULAUAN MENTAWAI REGION, INDONESIA
  • Distances:
    • 240 km (150 miles) W of Bengkulu, Sumatra, Indonesia
    • 280 km (175 miles) S of Padang, Sumatra, Indonesia
    • 305 km (190 miles) W of Lubuklinggau, Sumatra, Indonesia
    • 795 km (500 miles) WNW of JAKARTA, Java, Indonesia
  • Location Uncertainty:
    • horizontal +/- 5.3 km (3.3 miles)
    • depth +/- 3.4 km (2.1 miles)
  • Source: USGS NEIC (WDCS-D)
  • Event ID: usa00043nx

Related Links:

Posted in Indonesia earthquake, Indonesia quake, Indonesia tsunami, Mentawai islands, tsunami, volcano alert | Tagged: , , , | Leave a Comment »

Strong Earthquake Strikes Southern Sumatra

Posted by feww on May 6, 2010

M6.5 Earthquake Strikes Southwest of Sumatra, Indonesia

The strong shock was centered at 4.063°S, 101.085°E and occurred at an estimated depth of about 27km on Wednesday, May 05, 2010 at 16:29:03 UTC, USGS/EHP said.

The earthquake epicenter was located about 50km (31 miles) NNW of a large 8.5Mw quake which struck on September 12, 2007 at a depth of about 34km (21miles) killing at least 25 people.

Tsunami Status

The Pacific Tsunami Center ruled out the possibility of a destructive widespread tsunami as a result of this quake, but did not rule out “a very small possibility of a local tsunami” that may affect the local coasts within a radius of about 100km from the quake’s epicenter.

Fire-Earth Forecast:

Fire-Earth Forecasts large scale volcanic activity in and around Sumatra Region in 2010 and beyond.

10-degree Map Centered at 5°S,100°E


Earthquake Location Map. Source: USGS/EHP. Map enhanced by Fire-Earth.


Earthquake Details

  • Magnitude: 6.5
  • Date-Time:
    • Wednesday, May 05, 2010 at 16:29:03 UTC
    • Wednesday, May 05, 2010 at 11:29:03 PM at epicenter
  • Location: 4.063°S, 101.085°E
  • Depth: 27 km (16.8 miles)
  • Region: SOUTHERN SUMATRA, INDONESIA
  • Distances:
    • 135 km (85 miles) WSW of Bengkulu, Sumatra, Indonesia
    • 215 km (135 miles) WSW of Lubuklinggau, Sumatra, Indonesia
    • 355 km (220 miles) SSE of Padang, Sumatra, Indonesia
    • 680 km (420 miles) WNW of JAKARTA, Java, Indonesia
  • Location Uncertainty:  horizontal +/- 5.3 km (3.3 miles)
  • Source:  USGS NEIC (WDCS-D)
  • Event ID: us2010vxbk

Related Links:

Serial No 1,677. Starting April 2010, each entry on this blog has a unique serial number. If any of the numbers are missing, it may mean that the corresponding entry has been blocked by Google/the authorities in your country. Please drop us a line if you detect any anomaly/missing number(s).

    Posted in earhquake forecast, earthquake, earthquake 2010, Indonesia quake, sumatra quake, Sumatra Volcanoes | Tagged: , , , , | Leave a Comment »

    Powerful Earthquake Strikes N. Sumatra, Indonesia

    Posted by feww on April 6, 2010

    Serial No  1,542. If any posts are blocked in your country, please drop us a line.

    Powerful earthquake measuring up to 7.9Mw strikes northern Sumatra, Indonesia

    The quake struck at a depth of about 46km (28.6 miles) on April 06, 2010 at 22:15:02UTC about 205 km (125 miles) WNW of Sibolga, Sumatra, Indonesia. The epicenter was located at 2.236°N, 97.046°E.

    The quake struck about 160km southeast of the magnitude 9.1 quake which triggered the destructive Boxing Day tsunami in 2004.

    The epicenter was also about 34km NNW of the a magnitude 8.6 shock which occurred on March 28, 2005.

    A magnitude 7.6 quake in West Sumatra in September 2009 killed 1,000 people, official records showed.

    Tsunami Evaluation

    The following bulletin was issued by the PACIFIC TSUNAMI WARNING CENTER/NOAA/NWS a short time ago:

    SEA LEVEL READINGS INDICATE A TSUNAMI WAS GENERATED. IT MAY HAVE BEEN DESTRUCTIVE ALONG COASTS NEAR THE EARTHQUAKE EPICENTER. FOR THOSE AREAS – WHEN DAMAGING WAVES HAVE NOT OCCURRED FOR AT LEAST TWO HOURS THEN LOCAL AUTHORITIES CAN ASSUME THE THREAT IS PASSED. DANGER TO BOATS AND COASTAL STRUCTURES CAN CONTINUE FOR SEVERAL HOURS DUE TO RAPID CURRENTS.  AS LOCAL CONDITIONS CAN CAUSE A WIDE VARIATION IN TSUNAMI WAVE ACTION THE ALL CLEAR DETERMINATION
    MUST BE MADE BY LOCAL AUTHORITIES.

    NO TSUNAMI THREAT EXISTS FOR OTHER COASTAL AREAS IN THE INDIAN OCEAN ALTHOUGH SOME OTHER AREAS MAY EXPERIENCE SMALL SEA LEVEL CHANGES AND STRONG OR UNUSUAL COASTAL CURRENTS.

    ESTIMATED INITIAL TSUNAMI WAVE ARRIVAL TIMES AT FORECAST POINTS WITHIN THE WARNING AND WATCH AREAS 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 SUCCESSIVE WAVES CAN BE FIVE MINUTES TO ONE HOUR.

    LOCATION         FORECAST POINT     COORDINATES     ARRIVAL TIME
    ———————————————————————————————————
    INDONESIA        SIMEULUE 2.5N  96.0E            22:46UTC 06 APR
    +++++++++++BELAWAN 3.8N  98.8E            02:33UTC 07 APR

    ADDITIONAL BULLETINS WILL BE ISSUED BY THE PACIFIC TSUNAMI  WARNING CENTER FOR THIS EVENT AS MORE INFORMATION BECOMES AVAILABLE.

    THE JAPAN METEOROLOGICAL AGENCY MAY ISSUE ADDITIONAL INFORMATION FOR THIS EVENT. IN THE CASE OF CONFLICTING INFORMATION…THE MORE CONSERVATIVE  INFORMATION SHOULD BE USED FOR SAFETY.

    There was no report of damage or casualties, as of posting.  However, a major power blackout on Simeulue Island, west of Aceh province, Indonesia, has been reported.

    Updates will posted in the comments section of this post.

    Earthquake Details:

    • Magnitude [USGS Estimate] 7.8
    • Date-Time:
      • Tuesday, April 06, 2010 at 22:15:02 UTC
      • Wednesday, April 07, 2010 at 05:15:02 AM at epicenter
    • Location: 2.236°N, 97.046°E
    • Depth: 46 km (28.6 miles)
    • Region: NORTHERN SUMATRA, INDONESIA
    • Distances:
      • 205 km (125 miles) WNW of Sibolga, Sumatra, Indonesia
      • 230 km (145 miles) SW of Medan, Sumatra, Indonesia
      • 525 km (325 miles) W of KUALA LUMPUR, Malaysia
      • 1425 km (880 miles) NW of JAKARTA, Java, Indonesia
    • Location Uncertainty: horizontal +/- 7.4 km (4.6 miles); depth +/- 11.6 km (7.2 miles)
    • Source: USGS NEIC (WDCS-D)
    • Event ID: us2010utc5

    Seismotectonics of the Indonesian Region

    Tectonics Plates The Indonesian region is one of the most seismically active zones of the earth; at the same time it has a leading position from the point of view of active and potentially active volcanoes. It is a typical island-arc structure with its characteristic physiographic features, such as a deep oceanic trench, a geanticline belt, a volcanic inner arc and a marginal basin.

    In most subduction zones, motion of the subducted plate is nearly perpendicular to the trench axis. In some cases, for example Sumatra, where the motion is oblique to the axis, a strike-slip fault zone is seen, and is lying parallel to the volcanic chain.

    In the subduction zone southwest of Sumatra, the Sunda trench axis strikes approximately N 37°W. The Indian Ocean crust is moving in an azimuth of approximately N 23°E relative to Southeast Asia, giving an angle of obliquity of 60°. Eastern Indonesia, forming the southeastern extremity of the Southeast Asian lithospheric plate, crushed between the northward-moving Indo-Australian and the westward-moving Pacific plates, is certainly the most complex active tectonic zone on earth. The rate of subduction is some centimeters per year; for example, it is 6.0 cm per year in the West Java Trench at 0°S 97°E (azimuth 23°); 4.9 cm per year in the East Java Trench at 12°S 120°E (azimuth 19°); and 10.7 cm per year in New Guinea at 3°S 142°E (azimuth 75°).

    Frequent volcanic eruptions and frequent earthquake shocks testify to the active tectonic processes which are currently in progress in response to the continued movement of these major plates. The distribution of small ocean basins, continental fragments, remnants of ancient magmatic arcs and numerous subduction complexes which make up the Indonesian region indicate that the past history of the region was equally tectonically active.

    Abridged from Southeast Asia Association of Seismology and Earthquake Engineering, Series on Seismology, Volume V – Indonesia, June 1985. (Source: USGS/EHP)

    Maps

    Related Links:

    Historic Earthquakes in Indonesia


    Posted in earthquake, Indonesia, KUALA LUMPUR, Medan, Seismic Hazard | Tagged: , , , , , , , | 1 Comment »

    Earthquakes: Human Enhanced Disasters – UPDATE 2 Oct 2009

    Posted by feww on October 2, 2009

    Sumatra Double Earthquakes

    FEWW Moderators believe it’s highly probable that another 2 or more strong to powerful quakes could strike the region in the coming days. Padang and other coastal towns in Sumatra and Java must also prepare for a possible tsunami.

    At least 1,200 bodies have been recovered following widespread damage after a magnitude 7.9 quake  struck southern Sumatra, Indonesia, on Wednesday, according to the officials.

    The Death Toll Could Reach Many Thousands


    There are no reports of deaths from the 6.8 magnitude quake that struck southern Sumatra  on Thursday. However. a local radio station reported that a dozen 12 people had been injured and up to 75 building damaged in  the town of Jambi.

    “People are trapped and screaming for help but they are below huge slabs which will take heavy equipment to move,” an aid worker said.

    “I saw dozens of the biggest buildings collapsed in town. Most of the damage is concentrated in the commercial center market, which was fully packed,” he said.

    Images that will be repeated throughout the world, again, and again

    sdq more dead bodies
    Residents stand near the bodies of earthquake victims at a hospital in Padang on Indonesia’s Sumatra
    island October 1, 2009.  REUTERS/Muhammad Fitrah/Singgalang Newspaper

    Regional Economy

    West Sumatra, a major producer of crude palm oil, is also affected economically.

    Indonesia’s finance minister Sri Mulyani said: “This region has been damaged seriously, including its infrastructure,” adding that her government has allocated $25 million over two month for emergency operations.

    Related Links:

    Posted in Jambi, Padang Quake, palm oil production, Southern Sumatra quake, Sri Mulyani, sumatra quake | Tagged: , , , , , , | 1 Comment »