British Geological Survey. 2018 Hartland Observatory Monthly Magnetic Bulletin: December 2017. British Geological Survey, 32pp. (Monthly Magnetic Bulletin Series: 17/12/HA) (Unpublished)
Abstract
This bulletin contains the monthly preliminary observatory results, published to meet the needs of all users of geomagnetic data. Magnetic observatory data are presented as a series of plots of one-minute, hourly and daily values, followed by tabulations of monthly values, geomagnetic activity indices and reports of rapid variations. The operation of the observatory and presentation of data are described in the introduction.
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BGS Programmes 2018 > Earth Hazards & Observatories
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