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All you who Laugh at California
grumpygy
Member Posts: 53,466 ✭
About their earthquakes. Well you in the mid west better get ready.
quote:
PASADENA, Calif. - Earthquake activity in the New Madrid Seismic Zone in the central United States does not seem to be slowing down. In a new study published in the journal "Science," seismologists Morgan Page and Susan Hough of the U.S. Geological Survey investigate whether current quakes in the region could be aftershocks of large earthquakes that occurred 200 years earlier.
Using extensive computer modeling of aftershock behavior, they show that the dearth of moderate (Magnitude 6) earthquakes following the series of large earthquakes in 1811-1812, combined with the high rates of small earthquakes today, is not consistent with the long-lived aftershock hypothesis.
A debate has swirled in recent years, fueled in part by past studies suggesting that continuing New Madrid seismic activity could be the tail end of a long-lived aftershock sequence following the 1811-1812 earthquakes. If modern activity is an aftershock sequence, the argument goes, then there is no evidence that stress is currently building in the zone. Instead, Page and Hough conclude that the current level of activity must be the signature of active, ongoing processes that continue to generate stress in the region -stress that we expect will eventually be released in future large earthquakes. In other words, the New Madrid Seismic Zone is not dead.
The New Madrid Seismic Zone in the central United States produced 4 large earthquakes with magnitudes upwards of 7 over the winter of 1811-1812. Over the last two centuries, small quakes have continued to occur in the zone at a higher rate than elsewhere in the central United States. Geologic evidence also shows that large earthquake sequences occurred there in about 1450 A.D. and 900 A.D.
quote:
PASADENA, Calif. - Earthquake activity in the New Madrid Seismic Zone in the central United States does not seem to be slowing down. In a new study published in the journal "Science," seismologists Morgan Page and Susan Hough of the U.S. Geological Survey investigate whether current quakes in the region could be aftershocks of large earthquakes that occurred 200 years earlier.
Using extensive computer modeling of aftershock behavior, they show that the dearth of moderate (Magnitude 6) earthquakes following the series of large earthquakes in 1811-1812, combined with the high rates of small earthquakes today, is not consistent with the long-lived aftershock hypothesis.
A debate has swirled in recent years, fueled in part by past studies suggesting that continuing New Madrid seismic activity could be the tail end of a long-lived aftershock sequence following the 1811-1812 earthquakes. If modern activity is an aftershock sequence, the argument goes, then there is no evidence that stress is currently building in the zone. Instead, Page and Hough conclude that the current level of activity must be the signature of active, ongoing processes that continue to generate stress in the region -stress that we expect will eventually be released in future large earthquakes. In other words, the New Madrid Seismic Zone is not dead.
The New Madrid Seismic Zone in the central United States produced 4 large earthquakes with magnitudes upwards of 7 over the winter of 1811-1812. Over the last two centuries, small quakes have continued to occur in the zone at a higher rate than elsewhere in the central United States. Geologic evidence also shows that large earthquake sequences occurred there in about 1450 A.D. and 900 A.D.
Comments
So does that mean when the big one hits, Missouri will fall into the Gulf of Mexico?
No it will be swept into Canada by the Mississippi flowing backwards.[;)][:D]
So does that mean when the big one hits, Missouri will fall into the Gulf of Mexico?
No it will fall into California and knock California into the Pacific.[;)]
For the past 40 years i have heard about the "great quake" that will open up from chicago to dallas. We have teetiny little quakes here all the time. I never knew how many until i got my first apt. The first few times i thought I was imagining things. But evrry wkend in the wee hours of the morning while watching a movie in the peaceful calm and quiet i could feel the building move just ever so much.
Me, too, but in my case it is EVERY day and night.
I think it might be the train running on the tracks 2 blocks North of my house. [:D] [:D] [:D]
oh ya computer modeling, that's what gave us this global warming crapola.
they can't figure out if it's going to rain or snow here tomorrow i'm not to impressed with their computer skills!
quote:Originally posted by Ray B
So does that mean when the big one hits, Missouri will fall into the Gulf of Mexico?
No it will fall into California and knock California into the Pacific.[;)]
That my theory. The Midwest quakes are just doing us a favor trying to help CA fall into the ocean.
I don't laugh at their laws or politics, either. I fear them. Unlike Bubonic Plague, there is no way to stop liberalism; it is virulent & a threat to the greatest country on Earth.
Neal