The Plate Boundary Observatory installed five long-baseline laser strainmeters (LSM) and took over the operation and maintenance of a legacy station that was built to similar specifications. LSMs use a laser to measure the change in the relative position of end monuments hundreds of meters apart. These very stable and high-precision instruments measure strain change from months to decades and are an important tool for cross-validating long-term GPS measurements and monitoring stored energy near a major fault.
Raw data files from the laser strainmeters are available in the native format of the Ice Nine logger. These data are available from the PBO strainmeter archives at NCEDC and IRIS DMC. Additionally, raw data are available in SEED format, enabling users of the data to generate requests for these data with existing data center request mechanisms, thereby allowing a user to sort, delimit, and group these data jointly with all the appropriately related environmental sensor data that is collected in addition to the raw strain data. SEED data are available using all the traditional SEED request methods from IRIS DMC and NCEDC.
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National Aeronautics and |
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National |
Overview
2010