| Abstract Submission No. | ABS-3.1-0173 |
| Title of Abstract | ARE THE INDIAN SUBCONTINENTAL COASTS HAZARDOUS DUE TO TSUNAMIGENIC EARTQUAKES LIKE SUMATRA (Mw 9.3) OF 26 DECEMBER 2004? |
| Authors | B.Ramalingeswara Rao* |
| Organisation | Former NGRI |
| Address | Sai Surya Residencey, Raghavendra NagarB,Kondapur,HighTech city Hyderabad, T.S., India Pincode: 500084 E-mail: brrao_buddha@yahoo.com |
| Country | India |
| Presentation | Oral |
| Abstract | Abstract Tsunamis are characterized and generated by subduction zone megthrust earthquakes. The horizontal length of the locked slab and thin layer of sediments are playing an important role for maximum strain accumulation in megthrust faults in the subducting zones. It is being loaded with cyclic stresses due to oblque Indo-Australian Plate subduction under Sunda Arc region. The maximum slip due to the earthquake of 26 December, 2004 , Mw 9.3 ,focal depth of 36 km is about 30m that displaces a mass of sea water from equilibrium position to vertical displacement of 10-15m from the source of this mega thrust earthquake at mantle wedge at a adistance of 160km from the mouth of the subduction zone. An another large earthquake occurred on 28, Nov, 1945 in Makran coast Mw 8.1 is less effective on the Indian coasts because of slow slipping rate which in turn had generated tsunami waves, is less affected western Indian coast. The physics of the earthquake process maybe explained. |
| Keywords | Tsunami, Megathrust ,subduction , sedimentation |