October 4, 2012 |
Seismologists' understanding of how rock surfaces behave when ground together in earthquake faults has been limited by their ability to conduct experiments that simulate the massive forces generated in a temblor. For many years, researchers have simply taken two adjoining rock surfaces and placed pressure on them until they broke. This method, however, doesn't come close to representing the force of large, damaging earthquakes. Now, seismologists at University of Oklahoma and the U.S. Geological Survey say they have created a device that approximates the force exerted by a Magnitude 8 earthquake.
March 27, 2013 |
HOUSTON -- Oklahoma's largest-recorded earthquake was triggered by injection wells used by the oil and gas industry, according to a report released this week. The Tuesday report in the geoscience journal Geology is the latest scientific evidence suggesting injection wells may be causing an uptick in earthquakes nationwide. However, the report was viewed skeptically by Oklahoma's official seismologist. The report's lead author, University of Oklahoma seismologist Katie Keranen, focused on a series of earthquakes in November 2011 near Prague, Okla., including a 5.7-magnitude temblor on Nov. 6, the largest recorded in state history.
CALIFORNIA | LOCAL
March 22, 2013 |
Two small earthquakes hit the Malibu and Moorpark area on Friday. Both quakes were magnitude 2.4 and occurred around 12:10 p.m. The one along the coast occurred six miles west of Malibu. The other one occurred several miles to the north in the Moorpark area of Ventura County. It is unclear whether the quakes were strong enough to be felt. ALSO: Bobby Brown wearing ankle monitor for DUI sentence Bell trial: After mistrial, next steps for attorneys unclear Chef who killed wife, then cooked body to be sentenced
July 11, 2013 |
The geothermal power plants at Southern California's Salton Sea don't just produce electricity, they also trigger thousands of temblors not far from one of the West Coast's most dangerous earthquake faults, a study says. A study published online Thursday in the journal Science found that as production rose at the Imperial County geothermal field, so did the number of earthquakes. From 1981 through 2012, more than 10,000 earthquakes above magnitude 1.75 were recorded in the area. “That group of earthquakes …. is connected to the production,” said Emily Brodsky, a UC Santa Cruz geophysicist and the paper's lead author.
CALIFORNIA | LOCAL
March 27, 2013 |
A series of earthquakes hit the California desert area Wednesday, near the site of a larger earthquake earlier this month. An initial shallow magnitude 3.6 earthquake was reported 13 miles from Anza, according to the U.S. Geological Survey. The temblor occurred at 11:17 a.m. PDT at a depth of 1.9 miles. It was followed by more than 20 other smaller quakes, the USGS said. There were no reports of damage or injuries. According to the USGS, residents in nearby communities, including Indio, reported feeling the 3.6 temblor.
October 2, 2012
Re "PG&E undersea air-blast plan assailed," Sept. 29 Regarding Pacific Gas & Electric's possible seismic testing in the Diablo Canyon nuclear plant area: The assertion that marine mammals would not be harmed or killed by up to 250-decibel sound blasts into the ocean over several days is just not credible. And even if people believed that, what about the other local sea life that the mammals depend on for survival? Remember the old bumper-sticker slogan, "Diablo Canyon has a lot of faults"?