Expert warns of another quake in the Andaman region

April 13, 2012 NICOBAR ISLA fierce earthquake from the Nicobar Islands could strike over Songkran, sending a tsunami crashing into the Andaman Coast, an expert warned yesterday after finding that the 8.6 magnitude Sumatran tremor three days ago was exceptionally deep. “Whenever there is a quake rooted in the [Earth's] mantle, a following quake will be likely in the next few days,” said Professor Thanawat Jaruphongsakul, a senior seismologist at Chulalongkorn University. Fear of another devastating tsunami panicked Thailand and Southeast Asia on Wednesday. An underwater quake, with its epicenter at the Nicobar Islands, about 150 kilometres north of Aceh on Sumatra, would affect six coastal provinces of Thailand on the Andaman Sea, especially Ranong, which lies closest to a fault line connecting with the Nicobar Islands, he said. The quakes on Wednesday originated from mantle level crust, 20 kilometers below the Earth’s surface, which is regarded as a layer that would cause very high magnitude tremblers. The quake that hit Japan in March came from a shallower layer, so it would take up to 100150 years for the next quake. However Wednesday’s quakes, with their epicenter at Aceh, followed just eight years after the massive one that triggered a continent-wide tsunami that killed hundreds of thousands of people in many countries, he said. “Why did Wednesday’s quakes emerge just eight years afterwards? This is new to most seismologists and geologists, who are unfamiliar with quakes with depth rooting to the mantle layer,’ he said. Seismologists were closely watching and cautiously studying the 9.0 quake that devastated Sendai in Japan on March 11 last year. The first tremor on March 9 was recorded at 7.3 on the Richter scale. That one was understood by seismologists as the main shock, but there were two aftershocks on an even greater scale at 9.0 on March 11 that followed, he said. The tsunamis created on Wednesday were not powerful or harmfully high because the quake was the horizontal dip slide type. But a mantle based quake at an island with active underwater volcanoes located north of the Nicobar Islands would probably be a vertical strike-slip type, which would directly impact the six Thai coastal provinces, and possibly deluge them with tsunamis, he added. –Asia One
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10 Responses to Expert warns of another quake in the Andaman region

  1. Rob says:

    This is NOT good news!

    Like

  2. Joel says:

    Also Motagua fault represents a potential earthquake event, this fault cross Guatemala from Atlantic sea (Haiti) and not have any connection with coco’s fault at the moment. What would happen when this Motagua fault connect with coco’s fault…..you can see this fault on: http://earthquake.usgs.gov/earthquakes/recenteqsww/Maps/10/270_15.php.

    Regards

    Like

  3. nickk0 says:

    Thank you for posting this article, Alvin…… It is quite telling.

    Like

  4. sounds like an amazing place

    this whole area seems like paradise

    http://thinksimplenow.com/simplytina/2008/04/india-ends-with-the-andaman-islands/

    lots of shaking going on the past few hours.

    Alvin,I can’t tell you how much I have learned from your book and website. It’s like I’m learning about our world for the first time whenever I stop by TEP.

    Thanks again for all your work — peace to you and yours

    Like

  5. seems they already knew something

    from 4/12: “By a strange coincidence, news of a massive earthquake off the Indonesian coast triggering fears of a tsunami came just after the Andaman and Nicobar Islands Lt Governor held a high-level meeting to review its disaster preparedness…….”

    http://www.thehindu.com/news/national/article3304657.ece#comments

    Like

  6. prayntongues says:

    “The quake that hit Japan in March came from a shallower layer, so it would take up to 100150 years for the next quake.” I wonder how the seismologist can be so sure that the next large magnitude quake in Japan won’t happen for over 100,000 yrs. This seems to be a ridiculous claim

    Like

    • nickk0 says:

      I think that is a typographical error – I believe they meant to state, “100-150″ years.

      But then, that is an estimate based upon ‘current models’, which may turn out to be obsolete. Time will tell.

      Like

      • Bone Idle says:

        You can three large quakes in 10 years and then none for 150 years – this sort of skews the statistics.
        2004 – Mag 9 just west of Simeulue
        2005 – Mag 8.7 Nias – Just south of Simeulue
        2012 – Mag 8.6 west of Simeulue
        2012 – Mag 8.2 west of Simeulue

        1923 Kanto earthquake Japan Mag 7.9 – 10 metre Tsunami. – est 142,000 casualties.
        2011 Mag 9.0 off Sendai.

        I don’t know where that seismologist can forecast anything such timeframe- especially since the experts are expecting another 1923 like event at any time – in fact allegedly overdue

        Like

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