tsunami danger Indonesia
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11 Apr 2012, 12:52
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Journals
Anybody heard news? The first hit to Thailand was 10cm high. not as bad as it was thought to be. There's a new threat. post-earthquakes have been like 8.3 magnitudes. My gf is in Thailand right now so if someone knows something plz speak.
This appears to have been a strike-slip earthquake (focal mechanism). It is unlikely that there will be a devastating tsunami.
edit: I should explain further. Tsunamis are generated by displacement of water. In the case of the 2004 Indian Ocean earthquake, it was a megathrust which displaced a lot of water vertically, like so. This earthquake was almost purely strike-slip. Strike-slip earthquakes are completely horizontal--there is no vertical displacement. Since the vertical displacement of this earthquake will be relatively limited, the amount of water displaced and therefore tsunami is also likely to be limited.
edit2: I should further note that a devastating tsunami is not likely, at least not like the 2004 one, but I do not know exactly how large a tsunami this earthquake may generate. To generate a tsunami, you must have vertical uplift of water. It is not impossible for strike-slip earthquakes to generate vertical uplift of water, however. If the strike-slip movement is towards the continental slope, there may still be some vertical offset. Imagine that the earthquake occurs in an area with 100m depth water, and the strike-slip motion is towards shallower water and land. The huge 100m stack of that water lying above the epicenter then moves towards land, too, where the water may only be 80m deep. Suddenly you've just produced 20m of vertical offset because you moved a 100m deep stack of water to an area that's only 80m deep. The strike-slip motion appears to be in ESE oblique against Indonesia, though, so I still doubt a devastating tsunami.
But well mother nature can be cruel at times. ._.
Hopefully theres not going to be anymore earthquakes. In Ao Nang (Phuket) water was gone like in 15 minutes. much of rain and thunders too
U mad because your gf split in half?!
U MAD BRAH?