Abstract

<p>The British Geological Survey is responsible for conducting the UK geomagnetic repeat station programme. Measurements made at the UK repeat station sites are used in conjunction with the three UK magnetic observatories: Hartland, Eskdalemuir and Lerwick, to produce a regional model of the local field each year. The UK network of repeat stations comprises 41 stations which are occupied at approximately 3-4 year intervals. Practices for conducting repeat station measurements continue to evolve as advances are made in survey instrumentation and as the usage of the data continues to change. Here, a summary of the 2009 and 2010 UK repeat station surveys is presented, highlighting the measurement process and techniques, density of network, reduction process and recent results.</p>

Highlights

  • These sites are classified as 'first-order' repeat stations, using magnetic observatories for reduction of data to quiet time levels [Netwitt et al 1996]

  • Every year a UK regional model of the magnetic field and its present and near-future rate of change is produced in conjunction with a fieldwork campaign of repeat station measurements across the UK

  • In this paper we present the most recent model (OSMOD2011), which has been updated with measurements made in 2009 and 2010, when a total of 19 repeat stations were occupied over the two summer fieldwork campaigns (Figure 1)

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Summary

Introduction

These sites are classified as 'first-order' repeat stations, using magnetic observatories for reduction of data to quiet time levels [Netwitt et al 1996]. 1. Introduction Every year a UK regional model of the magnetic field and its present and near-future rate of change is produced in conjunction with a fieldwork campaign of repeat station measurements across the UK.

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