Saturday, 5 March 2011

Earthquakes in some unusual places

There have been an unusual amount of earthquakes in "odd" places. These tremors are occurring not just as earthquakes but other, inexplicable earth form events that have scientists perplexed. 

There have been quite a number of 6.0 plus magnitude earthquakes around the world this week. Easter Island to Baffin Bay, Rat Islands Alaska to Panama to the Gulf of California. China experienced a 6.0 that collapsed 10,000 homes, damaged 40,000 and caused much other havoc. 

In addition to the strong earthquakes in diverse places this week, two highly unusual events have also occurred. One is that scientists have detected mysterious tremors deep under the San Andreas Fault in California.

Mysterious tremors detected on San Andreas Fault"Scientists have detected a spike in underground rumblings on a section of California's San Andreas Fault that produced a magnitude-7.8 earthquake in 1857. What these mysterious vibrations say about future earthquakes is far from certain. But some think the deep tremors suggest underground stress may be building up faster than expected and may indicate an increased risk of a major temblor." 
"Researchers at the University of California, Berkeley, monitored seismic activity on the fault's central section between July 2001 and February 2009 and recorded more than 2,000 tremors. The tremors lasted mere minutes to nearly half an hour." The tremors are at a level that is twice as high as before the 6.5 magnitude 2003 quake. The fact that the tremors haven't gone down means the time to the next earthquake may come sooner," said Berkeley seismologist and lead researcher Robert Nadeau." 

'Uplift' baffles scientists, transforms area beach 

"Like a giant fist punching through the earth, a 1,000-foot long section of the beach below Bluff Point rose up 20 feet from the tidelands sometime last Friday or late Thursday, pushing boulders up from the ocean bottom, cracking sandstone slabs and toppling rocks upside down. Below Bluff Point, a new fissure opened up at the base of the 800-foot high cliff."

Scientists don't know exactly what caused the uplift. It would take an earthquake over magnitude 7 to cause an uplift that high, said Peter Haeussler, a geologist with the U.S. Geological Survey in Anchorage. "I have no idea," he said when he first learned of the uplift. "This sounds really, really bizarre."

Though Mount Redoubt volcano has been extremely active, scientists do not attribute the mysterious uplift at Homer across the bay to be connected. Scientists have also ruled out an earthquake as the cause. Haeussler said, "You would have felt a huge earthquake if it was earthquake related." 

'Uplift' baffles scientists, transforms area beach 
"Like a giant fist punching through the earth, a 1,000-foot long section of the beach below Bluff Point rose up 20 feet from the tidelands sometime last Friday or late Thursday, pushing boulders up from the ocean bottom, cracking sandstone slabs and toppling rocks upside down. Below Bluff Point, a new fissure opened up at the base of the 800-foot high cliff."
Scientists don't know exactly what caused the uplift. It would take an earthquake over magnitude 7 to cause an uplift that high, said Peter Haeussler, a geologist with the U.S. Geological Survey in Anchorage. "I have no idea," he said when he first learned of the uplift. "This sounds really, really bizarre."
Though Mount Redoubt volcano has been extremely active, scientists do not attribute the mysterious uplift at Homer across the bay to be connected. Scientists have also ruled out an earthquake as the cause. Haeussler said, "You would have felt a huge earthquake if it was earthquake related." 

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