Resolving issues concerning Eskdalemuir geomagnetic hourly values

Macmillan, S.; Clarke, E.. 2011 Resolving issues concerning Eskdalemuir geomagnetic hourly values. Annales Geophysicae, 29. 283-288. 10.5194/angeo-29-283-2011

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Abstract/Summary

The hourly values of the geomagnetic field from 1911 to 1931 derived from measurements made at Eskdalemuir observatory in the UK, and available online from the World Data Centre for Geomagnetism at http://www.wdc.bgs.ac.uk/, have now been corrected. Previously they were 2-point averaged and transformed from the original north, east and vertical down values in the tables in the observatory yearbooks. This paper documents the course of events from discovering the post-processing done to the data to the final resolution of the problem. As it was through the development of a new index, the Inter-Hour Variability index, that this post-processing came to light, we provide a revised series of this index for Eskdalemuir and compare it with that from another European observatory. Conclusions of studies concerning long-term magnetic field variability and inferred solar variability, whilst not necessarily consistent with one another, are not obviuosly invalidated by the incorrect hourly values from Eskdalemuir. This series of events illustrates the challenges that lie ahead in removing any remaining errors and inconsistencies in the data holdings of different World Data Centres.

Item Type:	Publication - Article
Digital Object Identifier (DOI):	10.5194/angeo-29-283-2011
Programmes:	BGS Programmes 2010 > Earth hazards and systems
ISSN:	0992-7689
Additional Information. Not used in RCUK Gateway to Research.:	Annales Geophysicae (ANGEO) is the official open access journal of the European Geosciences Union (EGU) in the field of Solar Terrestrial Physics.
NORA Subject Terms:	Data and Information
Related URLs:	http://www.ann-geophys.net/29/283/2011/
Date made live:	09 Feb 2011 15:23 +0 (UTC)
URI:	https://nora.nerc.ac.uk/id/eprint/13356

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