Tsunami Report(Page 21-40)

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and further southern areas of Tamilnadu are shadowed by Sri Lanka, the wavesrefract around island and inundated these coastal areas. The damage to Kerala coaston the west coast of India is also due to this wave refraction beyond Kanyakumari.The wave modelling by Institute of Geophysics and Planetary Physics, University ofCalifornia also revealed similar results (Fig.14). According to this simulation, tsunamiwave hit Chennai coast about 110 minutes after its generation and has got 1.4 m ofrun up.10 min50 min100 min110 min120 min180 minFIG 13. Visualisation of Tsunami Wave propagation across Indian Ocean.The red color indicates the water surface is higher than normal, while the blue indicateslower (Courtesy: National Institute of Advanced Industrial Science and Technology, Japan).24
Tsunami energyFIG 14. Simulation of Tsunami Wave propagation across Indian Ocean(Courtesy: Institute of Geophysics and Planetary Physics, University of California)5.2 Physical ObservationsNational Institute of Ocean Technology (NIOT), Chennai has deployed Acoustic TideGauges (ATG) at selected places along the Indian coast and Port Blair. The tidegauge at Port Blair, S.Andaman functioned normally till 06.50 hrs on 26 th December2004 and showed the tide level of 2.4 m. At 07:15 hrs tide gauge showed abnormallyhigh water level of 3.48 m, an increase of water level by 1.0 m due to tsunami (Fig.15). It is to note that the tide levels immediately after the tsunami are around 0.8 m,above the normal sea level. This may be due to the subsidence of the land in PortBlair. The tide levels recorded by Andaman harbour works in Port Blair at differentjetties also seem to be showing tide level in excess of 0.8 m which confirm possibleland subsidence to this extent.25
Page 1 and 2: 4.1.1 Diving Indian plateThe earthq
Page 3: Shallow focus earthquakes measuring
Page 7 and 8: The Tide gauge data from major port
Page 9 and 10: FIG 18. Variation of Wave height an
Page 11 and 12: Subsequently a series of waves hit
Page 13 and 14: TABLE 3. Distribution of Bacterial
Page 15 and 16: 5.3.3 South of ChennaiFIG 24.The pr
Page 17 and 18: (Courtesy: NRSA)FIG 26. Satellite i
Page 19 and 20: Fishing HarbourAgricultural LandsBe

Tsunami Report(Page 21-40)

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