Active volcanoes guided Tsunamigenic earthquakes from Andaman – Indonesia regions – A tectonic model

The Indian Ocean Tsunami of Northern Sumatra Great Earthquake disastrous event (Mw 9.3) on 26th December 2004, had initiated release of trains of aftershocks in different directions. The above events resulted in explosions of series of Volcanoes of Andaman and Indonesian Island Arc Belt. After the tsunamigenic Northern Sumatra Great Earthquake of 2004, consecutive many tsunamigenerations were formed from the following regions viz West coast of Northern Sumatra (M 8.7) at quadruplicate junction of Australia, India, Burma and Sunda plates on 28th March 2005; South of Jakarta, Indonesia between Australian plate and Sunda Plate on 17th July 2006; and South Sumatra M 8.5 on 12th September 2007. Similarly, the great Indian Ocean tsunami event of 2004 and its aftershocks have also resulted in an additional pressure at specific locations in Andaman-Indonesian Island Arc system and finally a series of volcanoes were erupted as follows viz Barren Volcano of Andaman on May 2005; Talang volcano of Northwestern Sumatra on 12th April 2005; Merapi volcano of Jawa on 14th April 2006 and volcanoes at West Java adjoining to Merapi volcano. On considering the near past seismic and volcanic active scenario of Andaman and Indonesia Arc region it look more possible for earthquake triggered volcanoes and eruptive volcanoes controlled tsunamigenic earthquakes. Based on the sites of Tsunamigenic earthquakes, locations of activated volcanoes, movement directions of harmonic seismic aftershocks of each tsunamigenic earthquakes, Migrations of Magma and decompression melting due to harmonic seismic tremors resulted in a tsunamigenic earthquakes are highlighted in the tectonic model.