Posted on 12/28/2004 1:58:44 PM PST by BJungNan
OK..thanks for that explanation..I understand the data,a nd the theory being cited..but it's NOT a proven, right..it's a theory, extrapolated from data, which is both not precise, and scarce..IOW, we could be infor a surprise someday, SOMWHERE. Again, I'm NOT arguing with you, per se..heck..I don't know enough about it to argue with myself..(G) but the analysis you described is like the old joke of blindfolded people describing an elephant by touching it..
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You are correct. The thrust Earthquake covered a distance of somewhere in the neighborhood of 700 miles. 1200 Km was the figure I heard, and my conversions suck. Average uplift was about 15 Meters. that is just under 50 feet. So part of the sea floor rose by 50 feet, while parts to the west SUNK as the Indian Plate subducted under the Burma plate. Hense the huge waves.
http://neic.usgs.gov/neis/bulletin/neic_slav_ts.html
Magnitude 9.0 OFF W COAST OF NORTHERN SUMATRA
Sunday, December 26, 2004 at 00:58:49 UTC
Preliminary Earthquake Report
U.S. Geological Survey, National Earthquake Information Center
World Data Center for Seismology, Denver
The devastating megathrust earthquake of December 26, 2004, occurred on the interface of the India and Burma plates and was caused by the release of stresses that develop as the India plate subducts beneath the overriding Burma plate. The India plate begins its descent into the mantle at the Sunda trench, which lies to the west of the earthquake's epicenter. The trench is the surface expression of the plate interface between the Australia and India plates, situated to the southwest of the trench, and the Burma and Sunda plates, situated to the northeast.
In the region of the earthquake, the India plate moves toward the northeast at a rate of about 6 cm/year relative to the Burma plate. This results in oblique convergence at the Sunda trench. The oblique motion is partitioned into thrust-faulting, which occurs on the plate-interface and which involves slip directed perpendicular to the trench, and strike-slip faulting, which occurs several hundred kilometers to the east of the trench and involves slip directed parallel to the trench. The December 26 earthquake occurred as the result of thrust-faulting.
Preliminary locations of larger aftershocks following the megathrust earthquake show that approximately 1200 km of the plate boundary slipped as a result of the earthquake. By comparison with other large megathrust earthquakes, the width of the causative fault-rupture was likely over one-hundred km. From the size of the earthquake, it is likely that the average displacement on the fault plane was about fifteen meters. The sea floor overlying the thrust fault would have been uplifted by several meters as a result of the earthquake. The above estimates of fault-dimensions and displacement will be refined in the near future as the result of detailed analyses of the earthquake waves.
The world's largest recorded earthquakes have all been megathrust events, occurring where one tectonic plate subducts beneath another. These include:
the magnitude 9.5 1960 Chile earthquake, the magnitude 9.2 1964 Prince William Sound, Alaska, earthquake, the magnitude 9.1 1957 Andreanof Islands, Alaska, earthquake, and the magnitude 9.0 1952 Kamchatka earthquake. As with the recent event, megathrust earthquakes often generate large tsunamis that cause damage over a much wider area than is directly affected by ground shaking near the earthquake's rupture.
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Debris is scattered where bungalows and shops formerly stood, Tuesday, Dec. 28, 2004, at Ton Sai Bay on Phi Phi Island, in Thailand. Soldiers used bulldozers Tuesday to push into a strip of Thai luxury resorts destroyed by tidal waves, and picked the bodies of European tourists from ruined gardens and suites. (AP Photo/Suzanne Plunkett
Link to Tsunami Album #1 from Phuket
I don't know what words to use to describe the guys you see that have the horrible task of retrieving the bodies. Strong. Is that the word?
After:
Debris are scattered on a narrow section of Phi Phi Island where bungalows formerly stood at Ton Sai Bay,Phi Phi Island, after a tsunami hit the area, December 28, 2004. Nations bordering the Indian Ocean from Indonesia to Sri Lanka clawed through the wreckage of a devastating quake-triggered tsunami.
An aerial view of a destroyed and flooded village after tidal waves near the provincial capital of Banda Aceh, Aceh province, Indonesia, Tuesday, Dec. 28, 2004. (AP Photo/Dita Alangkara)
An aerial view of a destroyed village after tidal waves hit following an earthquake near the provincial capital of Banda Aceh, Aceh province, Indonesia, Tuesday, Dec. 28, 2004. At the northern tip of Indonesia's Sumatra island, emergency workers find that 10,000 people were killed in a single town near the epicenter of Sunday's earthquake, and survivors report entire towns inundated by water and starving families surviving on coconuts. (AP Photo/Dita Alangkara
General view of the damage at Ton Sai Bay area on Thailand's Phi Phi island, December 28, 2004 after a tsunami hit the area. The sea and wreckage of coastal towns all around the Indian Ocean yielded up tens of thousands of bodies on Tuesday, pushing the toll from Sunday's tsunami past 50,000. REUTERS/Luis Enrique Ascui
I think that there are some people who are "strong", as they find it in their hearts to make sure to take care of the dead and dying.
Words fail...only prayers for the victims, their families and those who are doing their best under such horrific conditions.
Amazing shot!
I decided to do a google search on meteor earthquakes
Ping
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It's not a religious conviction, but I am a geologist, and I've had this pet peeve every since I watched the movie East of Java (the volcano actually was west of Java.) Us Geologists tend to be sticklers for correct nomenclature (I guess that's why they say we have 'A' personalities.
It's not a religious conviction, but I am a geologist, and I've had this pet peeve every since I watched the movie East of Java (the volcano actually was west of Java.) Us Geologists tend to be sticklers for correct nomenclature (I guess that's why they say we have 'A' personalities.) A Priest that was a Seismologist? That's awesome!
I wish I could recall his name. What a wonderful guy. He had been in charge of that department since its inception. This was over 30 years ago and there were not nearly as many seismographs in the US at the time. I had not thought about him in a long time, actually since the last big wave event. I recall how precise he was in his discussions.
Seeing this globe, just THINK of all the tiny, little isolated islands of which we never heard out in that vast ocean, think how they have been effected by this. Just think how long it will be until (or IF) we find out about all the tiny islands' people.
There are thousands of islands where people live(d) that probably haven't been contacted or seen yet. This is just so sad!
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