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Regional-Scale High-Latitude Extreme Geoelectric Fields Pertaining to Geomagnetically Induced CurrentsMotivated by the needs of the high-voltage power transmission industry, we use data from the high-latitude IMAGE magnetometer array to study characteristics of extreme geoelectric fields at regional scales. We use 10-s resolution data for years 1993-2013, and the fields are characterized using average horizontal geoelectric field amplitudes taken over station groups that span about 500-km distance. We show that geoelectric field structures associated with localized extremes at single stations can be greatly different from structures associated with regionally uniform geoelectric fields, which are well represented by spatial averages over single stations. Visual extrapolation and rigorous extreme value analysis of spatially averaged fields indicate that the expected range for 1-in-100-year extreme events are 3-8 V/km and 3.4-7.1 V/km, respectively. The Quebec reference ground model is used in the calculations.
Document ID
20160005290
Document Type
Reprint (Version printed in journal)
Authors
Pulkkinen, Antti (NASA Goddard Space Flight Center Greenbelt, MD United States)
Bernabeu, Emanuel (PJM Interconnection LLC Audubon, PA, United States)
Eichner, Jan (Munich Reinsurance Co. Germany)
Viljanen, Ari (Finnish Meteorological Inst. Helsinki, Finland)
Ngwira, Chigomezyo (Catholic Univ. of America Washington, DC, United States)
Date Acquired
April 22, 2016
Publication Date
June 19, 2015
Publication Information
Publication: Earth, Planets and Space
Volume: 67
Issue: 93
Subject Category
Geophysics
Report/Patent Number
GSFC-E-DAA-TN22081
Funding Number(s)
CONTRACT_GRANT: EURISGIC-260330
CONTRACT_GRANT: NNG11PL10A
Distribution Limits
Public
Copyright
Other
Keywords
polar regions
industries
high voltages