View Full Version : Temblor centered near Yucaipa
06-17-2005, 04:24 AM
Deputy Al, are those BEAN burritos yÃ¢â‚¬â„¢all have been eating?
06-17-2005, 05:19 AM
............Yup, right up there by Deputy Al's house! If you go here: http://www.trinet.org/shake/14155264/intensity.html you can see a map of the region showing major fault lines.
The line stating in the upper left corner and moving diagonally across the map, then down toward the Salton Sea is the San Andreas fault. Everything above that line is on the North American plate. South of it is the Pacific plate. Notice how the mountains all line up so nice with it, and the other fault lines appear as stress fractures on a bent piece of hard steel? Wonder why THAT is :D
Just to the south of the San Andreas toward the left in that mountainous region is Mt Baldy (Greyback) which is pretty much solid granite. When I worked at K-Mart in the late 70's I had a geology major handeling the toy dept. One of the first trips they take is to an exposed granite thrust fault on the backside of baldy (by that Wrightwood town on the map). It at that time supposedly had twice the theoretical pressure on it that rock of that type was supposed to be able to handle.
Per her proffessor if it slipped or released all at once it would produce ground waves of 3-4 foot in height radiating ourtward at the speed of sound. Goodby to So. California's infrastructure above AND below ground, no tto mention human death. According to him it would be a very tiny chance of that happening, but rather a series of 'slips' occuring over time to release the pressure.
While the North American plate is pushing the Pacific plate under it, they are also in slidding motion relative to each other. Most of the quakes we experience are due to the slipping motion.
06-17-2005, 06:13 AM
It was a noticeable jolt, but no damage here. One picture fell from the fireplace mantle, and didn't break--and a couple empty coffee cans fell from atop the gun safe in the garage--that was it. It must have been a slow news day, 'cause it takes about a 5.5 Richter scale event to get most peoples' attention around here. Then again, with all the Rust Belt Refugees swelling our population, folks not used to earthquakes get pretty excited about them. The news helicopters were in almost a holding pattern over my house's area for 3-4 hours.......I guess when no cracks opened up, and no houses got swallowed into chasms--they got bored and left.
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