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![TSUNAMI IS CAUSED BY ///
• TSUNAMI as known as a seismic sea wave, is a
series of waves in a water body caused by the
displacement of a large volume of water,
generally in an ocean or a large
lake.[3] Earthquakes, volcanic eruptions and
other underwater explosions](https://image.slidesharecdn.com/pptontsunami-160819062949/85/Ppt-on-tsunami-2-320.jpg)
![TSUNAMI IS CAUSED BY ///
• TSUNAMI as known as a seismic sea wave, is a
series of waves in a water body caused by the
displacement of a large volume of water,
generally in an ocean or a large
lake.[3] Earthquakes, volcanic eruptions and
other underwater explosions](https://image.slidesharecdn.com/pptontsunami-160819062949/75/Ppt-on-tsunami-2-2048.jpg)
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Ppt on tsunami
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- 2. TSUNAMI IS CAUSEDBY /// • TSUNAMI as known as a seismic sea wave, is a series of waves in a water body caused by the displacement of a large volume of water, generally in an ocean or a large lake.[3] Earthquakes, volcanic eruptions and other underwater explosions
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- 6. BASIC CONCEPTS: RIGIDPLATES • Earth's outer shell made up of ~15 major rigid plates ~ 100 km thick • Plates move relative to each other at speeds of a few cm/ yr (about the speed at which fingernails grow) • Plates are rigid in the sense that little (ideally no) deformation occurs within them, • Most (ideally all) deformation occurs at their boundaries, giving rise to earthquakes, mountain building, volcanism, and other spectacular phenomena. • Style of boundary and intraplate deformation depends on direction & rate of motion, together with thermo-mechanical structure
- 7. INDIAN PLATE MOVESNORTH COLLIDING WITH EURASIA
- 8. MODELING SEISMOGRAMS shows how slip variedon fault plane Maximum slip area ~400 km long Maximum slip ~ 20 m • VEDAVYAS
- 9. VEDAVYAS • NORMAL MODES (ULTRA- LONGPERIOD WAVES) SHOW SEISMIC MOMENT 3 TIMES THAT INFERRED FROM SURFACE WAVES • IMPLIES SLIP ON AREA 3 TIMES LARGER • Entire 1200-km long aftershock zone likely slipped
- 10. • V E D A V Y A S TSUNAMI -water wave generated by earthquake
- 11. TSUNAMI WARNING • Deepocean buoys can measure wave heights, verify tsunami and reduce false Because seismic waves travel much faster (km/s) than tsunamis, rapid analysis of seismograms can identify earthquakes likely to cause major tsunamis and predict when waves will arrive
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