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Lidar Maps Faults Near Lake Tahoe

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CARNELIAN BAY, Calif., May 25, 2012 — Faults west of Lake Tahoe, Calif., now pose a substantial increase in the seismic hazard assessment and potentially could generate earthquakes with magnitudes ranging from 6.3 to 6.9, according to a new US Geological Survey (USGS) study. A close association of landslide deposits and active faults suggests also that an earthquake-induced landslide hazard exists along the steep fault-formed range front west of Lake Tahoe, known as the Tahoe-Sierra frontal fault zone. Comparison of color aerial photography with airborne light detection and ranging (lidar) imagery in an area west of...Read full article

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    Published: May 2012
    Glossary
    lidar
    Lidar, short for light detection and ranging, is a remote sensing technology that uses laser light to measure distances and generate precise, three-dimensional information about the shape and characteristics of objects and surfaces. Lidar systems typically consist of a laser scanner, a GPS receiver, and an inertial measurement unit (IMU), all integrated into a single system. Here is how lidar works: Laser emission: A laser emits laser pulses, often in the form of rapid and repetitive laser...
    photonics
    The technology of generating and harnessing light and other forms of radiant energy whose quantum unit is the photon. The science includes light emission, transmission, deflection, amplification and detection by optical components and instruments, lasers and other light sources, fiber optics, electro-optical instrumentation, related hardware and electronics, and sophisticated systems. The range of applications of photonics extends from energy generation to detection to communications and...
    aerial map of EarthAmericasbare-earth airborne lidarCaliforniaearthquake faultsfault linesfault zonegeological hazardsglacierImagingindustrialJames HowleLake Tahoelidarlight detection and rangingMarcia McNuttmorainesphotonicsResearch & TechnologyTahoe-Sierra frontal fault zonetectonic deformationUniversity of California BerkeleyUniversity of NevadaUS Army Corps of EngineersUS Geological SurveyUSGS

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