Instruments
THEMIS makes data available from 190 magnetometer stations and 51 variometer stations across the United States of America, Canada, Greenland, Iceland, Denmark, Norway, Sweden, Finland, Antarctica, Australia, Russia, Mexico, Spain, and the United Kingdom.
GMAG Shortcuts:
- *new* GMAG daily Availability, Map and information
- Station names and data inventory (by year, pdf file).
- Detailed station data inventory (by month, 2007-2012, pdf file).
- Station contacts on the data description page.
- Detailed station information and location spreadsheet (pdf file).
- Instrument status updates are available here.
- GMAG Level 2 Data Processing History
Ten of these systems are installed with the Ground-Based Observatory (GBO) systems for THEMIS. Twelve are installed in schools and are part of the THEMIS Education and Public Outreach (E/PO) program. These magnetometers, known as the E/PO magnetometers, are the exact same type of magnetometer as those built for the GBOs. The THEMIS GMAGs measure the magnetic field with 0.01 nT resolution at 2 samples/second.
In addition to the THEMIS GMAGs mentioned above, data is available courtesy of the Mid-continent Magnetoseismic Chain (McMAC), the Falcon (FALCON) project, the Canadian Array for Realtime Investigations of Magnetic Activity (CARISMA, hosted by University of Alberta), the Magnetometer Array for Cusp and Cleft Studies (MACCS, hosted by Augsburg College), the Athabasca University THEMIS UCLA Magnetometer Network (AUTUMN/AUTUMNX, hosted by Athabasca University), the Geophysical Institute Magnetometer Array (GIMA, hosted by the University of Alaska Geophysical Institute), the Solar-Terrestrial Energy Program (STEP, hosted by University of Tokyo) Polar network, the Polar Experiment Network for Geophysical Upper-Atmosphere Investigations (PENGUIn, hosted by Virginia Tech), and the MagSTAR project (MAGSTAR), as well as magnetometer networks operated by the Tromsø Geophysical Observatory (TGO), the Technical University of Denmark (DTU), Natural Resources Canada (NRCan), the Canadian GeoSpace Monitoring (CGSM) program, the United States Geological Survey (USGS), the Finnish Meteorological Institute (FMI), the Geological Survey of Sweden (SGU), the Leirvogur Magnetic Observatory (LRV), the Arctic and Antarctic Research Institute (AARI), and the British Antarctic Survey (BAS).
Variometer data, or data from magnetometers designed to prioritize high sensitivity to relative magnetic field variations over absolute accuracy in magnetic field magnitudes, are also included in the THEMIS data archive, courtesy of the United States Geological Survey (USGS). Variometer data is archived in both the 1 second and 10 second time resolutions.
Please see the Data Policy and Credits for information on using the data from these networks.
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Development Institution: University of California, Los Angeles (UCLA) |
GMAGS Lead C. T. Russell (UCLA) |
