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Originally posted by summer5
MAP 6.9 2011/08/24 17:46:11 -7.689 -74.397 146.7 NORTHERN PERU
August 24, 2011 – MAMMOTH LAKES, Calif. – Long Valley Caldera – While the East Coast recovers from earthquake jitters, small quakes have been rocking California. A minor jolt struck the San Francisco Bay area Wednesday at 9:57 a.m., just hours after a similar temblor hit the same spot late Tuesday night. The U.S. Geological Survey says both magnitude- 3.6 quakes were centered about six miles southeast of Oakland along the Hayward fault, a major Northern California fault zone. The Sierra Nevada high country was also rattled by an earthquake early Wednesday. The USGS says a magnitude- 4.4 quake hit at 4:59 a.m. about nine miles southeast of Mammoth Lakes. A Mono County sheriff’s dispatcher says authorities have had no reports of damage. A magnitude-5.8 quake jolted much of the eastern United States on Tuesday.
Originally posted by BobAthome
reply to post by PuterMan
"KEV and WVT fall in the P/S wave shadow zones.
you are still missing an important wave density,,,,solar,, it is dense and a wave, and if the earth was a tuning fork, it would hum!
Originally posted by Robin Marks
It must be getting wavy in the Atlantic. Microsiem noise is starting to grow.
Originally posted by westcoast
reply to post by watchdog
That's what people used to think, but there have been some studies released just lately that indicate they do NOT relieve enough to have impact.
Anyone care to look that up? I know it was on this thread, and I think my washington state thread.
You can prevent large earthquakes by making lots of small ones, or by "lubricating" the fault with water
FICTION: Seismologists have observed that for every magnitude 6 earthquake there are about 10 of magnitude 5, 100 of magnitude 4, 1,000 of magnitude 3, and so forth as the events get smaller and smaller. This sounds like a lot of small earthquakes, but there are never enough small ones to eliminate the occasional large event. It would take 32 magnitude 5's, 1000 magnitude 4's, and 32,000 magnitude 3's to equal the energy of one magnitude 6 event. So, even though we always record many more small events than large ones, there are far too few to eliminate the need for the occasional large earthquake. As for "lubricating" faults with water or some other substance, if anything, this would have the opposite effect. Injecting high- pressure fluids deep into the ground is known to be able to trigger earthquakes—to cause them to occur sooner than would have been the case without the injection. This would be a dangerous pursuit in any populated area, as one might trigger a damaging earthquake.
Originally posted by MamaJ
reply to post by angelchemuel
USGS is calling it (for now) a 6.2???