Discussion in 'Current Events' started by Annie, Mar 28, 2005.
Same area as before:
Today's quake occurred within a few tens of miles of the 9.0 December 26, 2004 quake http://wwwneic.cr.usgs.gov/neis/eq_depot/2004/eq_041226/ that caused the killer tsunami. The USGS rates today's quake at 8.2 http://wwwneic.cr.usgs.gov/neis/bulletin/neic_weax.html.
Thus, the 12.26.04 quake had 8 times more amplitude and released about 25 times more energy than today's quake. Since it was so near to the the 12.26.04 quake site, will today's quake be considered an aftershock? Today's 8.2 quake is a very large. On average, there is only one 8.0+ quake in the world per year.
I can only hope and send good wishes to those in the area. I hope they see no serious damage from this one. Since Earthquakes are measured on a scale where the power is measured exponentially the 8.2 is actually quite a bit smaller than the 9.whatever-it-was.
How much longer can they have these dangerous quakes on the other side of the world before there starts to be balancing quakes in this hemisphere? Any science people on the board who knows about these things? Seems to me there have been a lot of bad quakes in the Eastern Hemisphere in recent years with no counter-balancing jolts on this side to compensate. Does it work that way? I'm curious.
I think it has more to do with the direction of the plates. As I understand it, the Indian plate is moving north, ramming into the Asian plate (causing the Himalayas to form). So the "counterbalance" would be the Asian plate moving somewhere, or possibly other plates to the south of the Indian plate moving north...? Not sure off the top of my head, but I'm pretty sure it's not an east-west balancing act.
The USGS has raised the estimated magnitude of todays quake to 8.7 http://earthquake.usgs.gov/eqinthenews/2005/usweax/. This was a huge quake. It occurred only a few tens of miles southeast of the killer 12.26.04 tsunami quake. If the 8.7 estimate stands up, then the 12.26.04 quake had 3 times more amplitude and released about 10 times more energy than today's quake.
At the Indonesian Meteorology and Geophysics' office in Jakarta, a computer monitor displayed a graph of the 8.7-magnitude earthquake.
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