Saturday, August 27, 2011
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Thursday, August 25, 2011
Wednesday, August 24, 2011
Tuesday, August 23, 2011
5.9 magnitude earthquake hits near Washington, D.C.
S/O TO ME AND PUNKY BEING ON OUR JOB PHONES TALKING WHEN WE FELT THE EARTHQUAKE SMH
"Central Virginia does get its share of minor earthquakes, but an earthquake of this size on the East Coast is certainly very unusual," says seismologist Karen Fischer of Brown University.Virginia is not on an active earthquake fault and is roughly in the middle of the North American continental crustal plate, she says. But it has residual fault scars left over from 200 to 300 million years ago, when it was an earthquake zone, at the time when the Atlantic Ocean rifted apart from Europe. "We are just seeing pressure build up and release on those scars," Fischer says. "There is a lot of debate on exactly what is going on down there and exactly how quakes this big happen in this kind of crustal zone."Because the crust under the East Coast is colder and firmer than the West Coast, shocks travel more efficiently through it, accounting for the widely felt shaking. "One lesson of this quake is that building codes will likely need to be revisited on the East Coast," Fischer says. "Because we are not as conscious of earthquakes here as the West Coast and we will have to see about structural damage to buildings, although I have not heard any damage reports so far."
"Central Virginia does get its share of minor earthquakes, but an earthquake of this size on the East Coast is certainly very unusual," says seismologist Karen Fischer of Brown University.Virginia is not on an active earthquake fault and is roughly in the middle of the North American continental crustal plate, she says. But it has residual fault scars left over from 200 to 300 million years ago, when it was an earthquake zone, at the time when the Atlantic Ocean rifted apart from Europe. "We are just seeing pressure build up and release on those scars," Fischer says. "There is a lot of debate on exactly what is going on down there and exactly how quakes this big happen in this kind of crustal zone."Because the crust under the East Coast is colder and firmer than the West Coast, shocks travel more efficiently through it, accounting for the widely felt shaking. "One lesson of this quake is that building codes will likely need to be revisited on the East Coast," Fischer says. "Because we are not as conscious of earthquakes here as the West Coast and we will have to see about structural damage to buildings, although I have not heard any damage reports so far."
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