First EarthScope PBO Raw Strainmeter Data Available

Overview

September 16, 2005

We, along with our partners at the University of California, San Diego (UCSD), the IRIS Data Management Center (IRIS DMC), and the Northern California Earthquake Data Center (NCEDC) at the University of California, Berkeley, are pleased to announce that the first raw strainmeter data from the EarthScope Plate Boundary Observatory are now available.

Data are available from three PBO borehole stations installed on the Olympic Peninsula, Washington state (P403, B004, and B001); from the first PBO laser strainmeter installed at Durmid Hill, along the southern San Andreas fault (DHL2); and from the previously operating Glendale-Verdugo strainmeter (GVS1), located near the Sierra Madre Fault. Installation and operation of B001, B004, P403, and the DHL2 strainmeter are supported by the National Science Foundation through the PBO element of the EarthScope project, while GVS1 operations are now supported by the NSF through the PBO Nucleus project.

PBO data collection from the two laser strainmeters began 1 June 2005, and the three borehole strainmeter stations began collecting data in late June. Raw data files from the laser strainmeters are available in the native format of the Ice Nine logger. Raw data files from the borehole strainmeters are available in the native bottle file format of the Gladwin tensor strainmeter logger. These data are available from the PBO strainmeter archives at (NCEDC)[http://www.ncedc.org/pbo/raw] and IRIS DMC.

In addition, raw data from both instruments 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.

These raw data are processed by two Analysis Centers. The Borehole Strainmeter Analysis Center is operated by UNAVCO at the PASSCAL Instrument Center in Socorro, NM, and the Laser Strainmeter Analysis Center is operated by UCSD. These centers created cleaned and calibrated strain time series, in XML format, that will be available from the PBO strainmeter archives before the end of September 2005. We will post a separate update, including links to data, formats, and parsing codes, when those data are available.

For more information, please contact Greg Anderson, PBO Data Products Manager.

The Plate Boundary Observatory is the geodetic component of EarthScope, operated by UNAVCO and funded by the National Science Foundation. EarthScope is funded by the National Science Foundation and conducted in partnership with the US Geological Survey (USGS)and NASA.