Ground-based vector and total-field scalar magnetometer time series are a cornerstone of the USGS' geomagnetic data services and research. These data include: near real time uncorrected magnetic "variation" data, taken from sensors roughly aligned with the local magnetic meridian; near real time "adjusted" data, which are corrected to align with geographic coordinates; archival "quasi-definitive" and "definitive" data, which have been further calibrated and cleaned to satisfy INTERMAGNET data quality standards; and various derived data products and indices used to assess and mitigate space weather and geomagnetic hazards. The "Plots" web application is an intuitive and flexible online visualization tool that allows users to select different geomagnetic data products, compare magnetic observatories and data channels, zoom into and pan across time intervals of interest, and retrieve the digital data used to generate the time series plots easily via a modern application programming interface (API).
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Adjusted geomagnetic data—Theoretical basis and validation
Adjusted geomagnetic data are magnetometer measurements with provisional correction factors applied such that vector quantities are oriented in a local Cartesian frame in which the X axis points north, the Y axis points east, and the Z axis points down. These correction factors are determined from so-called absolute measurements, which are “ground truth” observations made in the field using speciaAuthorsE. Joshua Rigler, Abram E. ClaycombReal-time geomagnetic monitoring for space weather-related applications: Opportunities and challenges
An examination is made of opportunities and challenges for enhancing global, real-time geomagnetic monitoring that would be beneficial for a variety of operational projects. This enhancement in geomagnetic monitoring can be attained by expanding the geographic distribution of magnetometer stations, improving the quality of magnetometer data, increasing acquisition sampling rates, increasing the prAuthorsJeffrey J. Love, Carol Finn - Web Tools
Web Service for Geomagnetism Data
Access geomagnetic data via our webservices.