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California Faults Moved Quietly After Baja Quake

By Guest PostMay 4, 2014Environmentandrea donnellan, atomarer nanoassembler, aus einem atom, blinder delfin, cultural psychologists, deep earthquakes, earthquake, earthquake cycle, east asians, gain face, give face, indus delfin, keishi okazaki, kilian singer, landslides, magnitude, moral purity, northern mexico, thomas bugnyar, uavsar, volcanoes, wie affen

A new NASA study finds that a major 2010 earthquake in northern Mexico triggered quiet, non-shaking motions on several Southern California faults that released as much energy as a magnitude 4.9 to 5.3 earthquake.

The quiet motion associated with the widely felt, magnitude 7.2 earthquake centered in northern Baja California in Mexico, in April 2010 was discovered in before-and-after radar images of the region made by a NASA airborne instrument that produces extremely accurate maps of Earth motions. The Uninhabited Aerial Vehicle Synthetic Aperture Radar (UAVSAR), which flies on a NASA C-20A aircraft from NASA’s Armstrong Flight Research Center facility in Palmdale, Calif., allows scientists to see how locations on Earth’s surface change between repeat flights over the same spot. (more…)

Eight Seconds of Terror

By Guest PostJanuary 17, 2014Environmentandrea donnellan, aperture radar mission, better models, blind thrust fault, california, crack, crust, crustal deformation, data analyses, downtown los angeles, earth, earthquake faults, earthquake in long beach, eight seconds, geodetic imaging techniques, geophysicist, global positioning system, golden guardian, gps, isro, large earthquakes, NASA, nature magazine, northridge earthquake, periodic shakeout, plate boundary observatory, reseda, rupture, san fernando valley, synthetic, terror, uavsar

A JPL Scientist Reflects on L.A.’s Last Big Quake

Twenty years ago this week, in the predawn darkness of Jan. 17, 1994, at five seconds before 4:31 a.m. PST, the ground ruptured violently on a blind thrust fault (a crack in Earth’s crust that does not reach the surface) about 11 miles (18 kilometers) beneath Reseda, in California’s San Fernando Valley about 20 miles (31 kilometers) northwest of downtown Los Angeles. The resulting magnitude 6.7 earthquake, known as the Northridge earthquake, became the first large quake to strike directly under an urban area in the United States since the 1933 magnitude 6.4 earthquake in Long Beach, Calif. (more…)

Managing the Deluge of ‘Big Data’ From Space

By Guest PostOctober 18, 2013Scienceandrea donnellan, big data, chris mattmann, cloud computing, data points, distant galaxies, earth, eric de jong, extracting data, flood of data, from space, gps data, jet propulsion laboratory, mars reconnaissance orbiter, NASA, nasa mission, pasadena, ska, software engineer, spacecraft monitor, square kilometer array, steve groom

For NASA and its dozens of missions, data pour in every day like rushing rivers. Spacecraft monitor everything from our home planet to faraway galaxies, beaming back images and information to Earth. All those digital records need to be stored, indexed and processed so that spacecraft engineers, scientists and people across the globe can use the data to understand Earth and the universe beyond.

At NASA’s Jet Propulsion Laboratory in Pasadena, Calif., mission planners and software engineers are coming up with new strategies for managing the ever-increasing flow of such large and complex data streams, referred to in the information technology community as “big data.” (more…)

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California Faults Moved Quietly After Baja Quake

Eight Seconds of Terror

Managing the Deluge of ‘Big Data’ From Space