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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…)

NASA Radar to Study Hawaii’s Most Active Volcano

By Guest PostJanuary 12, 2012Scienceactive volcano, airborne radar, big island, deformation, dryden flight research center, earth surface, east rift zone, edwards, hawaii, interferometry, jet propulsion laboratory, kilauea volcano, NASA, pasadena, pulses of microwave energy, research aircraft, sensor, uavsar, uninhabited aerial vehicle synthetic aperture radar

An airborne radar developed by NASA’s Jet Propulsion Laboratory, Pasadena, Calif., has returned to Hawaii to continue its study of Kilauea volcano, Hawaii’s current most active volcano.

The Uninhabited Aerial Vehicle Synthetic Aperture Radar, or UAVSAR, mounted in a pod under NASA’s G-III research aircraft from NASA’s Dryden Flight Research Center, Edwards, Calif., returned to Hawaii’s Big Island on Jan. 7. The one-week airborne campaign will help scientists better understand processes occurring under Earth’s surface at Kilauea. (more…)

NASA Airborne Radar Set to Image Hawaiian Volcano

By Guest PostApril 1, 2011Sciencebig island, earthquakes, eruption, glacier movements, gulfstream aircraft, hawaii, kilauea volcano, landslides, magma, NASA, pacific region, paul lundgren, rift zone, uavsar, uninhabited aerial vehicle synthetic aperture radar, volcanoes

PASADENA, Calif. – The Kilauea volcano that recently erupted on the Big Island of Hawaii will be the target for a NASA study to help scientists better understand processes occurring under Earth’s surface.

A NASA Gulfstream-III aircraft equipped with a synthetic aperture radar developed by NASA’s Jet Propulsion Laboratory in Pasadena, Calif., is scheduled to depart Sunday, April 3, from the Dryden Aircraft Operations Facility in Palmdale, Calif., to the Big Island for a nine-day mission. (more…)

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California Faults Moved Quietly After Baja Quake

Eight Seconds of Terror

NASA Radar to Study Hawaii’s Most Active Volcano

NASA Airborne Radar Set to Image Hawaiian Volcano