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Extreme Value Analysis of Ground Magnetometer Observations at Valentia Observatory_Ireland.pdf (1.67 MB)

Extreme Value Analysis of Ground Magnetometer Observations at Valentia Observatory, Ireland

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journal contribution
posted on 2023-10-02, 11:53 authored by AR Fogg, CM Jackman, J Malone-Leigh, PT Gallagher, AW Smith, M Lester, MT Walach, JE Waters
Understanding global space weather effects is of great importance to the international scientific community, but more localized space weather predictions are important on a national level. In this study, data from a ground magnetometer at Valentia Observatory is used to characterize space weather effects on the island of Ireland. The horizontal component of magnetometer observations and its time derivative are considered, and extreme values of these are identified. These extremes are fit to a generalized extreme value distribution, and from this model return values (the expected magnitude of an observation within a given time window) are predicted. The causes of extreme values are investigated both in a case study, and also statistically by looking at contributions from geomagnetic storms, substorms, and sudden commencements. This work characterizes the extreme part of the distribution of space weather effects on Ireland (and at similar latitudes), and hence examines those space weather observations which are likely to have the greatest impact on susceptible technologies.

Funding

Irish Research Council Government of Ireland Postdoctoral Fellowship. Grant Number: GOIPD/2022/782

Science Foundation Ireland. Grant Number: 18/FRL/6199

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A Consolidated Grant Proposal for Solar and Planetary Science at the University of Leicester, 2022 - 2025

Science and Technology Facilities Council

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History

Author affiliation

School of Physics & Astronomy, University of Leicester

Version

  • VoR (Version of Record)

Published in

Space Weather

Volume

21

Issue

7

Publisher

American Geophysical Union (AGU)

issn

1542-7390

eissn

1542-7390

Copyright date

2023

Available date

2023-10-02

Language

en

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