The latitudinal variation of geoelectromagnetic disturbances during large (Dst ≤-100 nT) geomagnetic storms

被引：22

作者：

Woodroffe, J. R. ^{[1
]}

Morley, S. K. ^{[1
]}

Jordanova, V. K. ^{[1
]}

Henderson, M. G. ^{[1
]}

Cowee, M. M. ^{[1
]}

Gjerloev, J. G. ^{[2
,3
]}

机构：

[1] Los Alamos Natl Lab, Space Sci & Applicat, Los Alamos, NM 87545 USA

[2] Johns Hopkins Univ, Appl Phys Lab, Laurel, MD USA

[3] Univ Bergen, Birkeland Ctr Space Sci, Bergen, Norway

来源：

SPACE WEATHER-THE INTERNATIONAL JOURNAL OF RESEARCH AND APPLICATIONS | 2016年 / 14卷 / 09期

关键词：

RING CURRENT; FIELD; SYSTEMS; STATISTICS; DEPENDENCE;

D O I：

10.1002/2016SW001376

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Geoelectromagnetic disturbances (GMDs) are an important consequence of space weather that can directly impact many types of terrestrial infrastructure. In this paper, we analyze 30 years of SuperMAG magnetometer data from the range of magnetic latitudes 20 degrees <= lambda <= 75 degrees to derive characteristic latitudinal profiles for median GMD amplitudes. Based on this data, we obtain a parameterization of these latitudinal profiles of different types of GMDs, providing an analytical fit with Dst-dependent parameters. We also obtain probabilistic estimates for the magnitudes of "100 year" GMDs, finding that B = 6.9 (3.60-12.9) nT/s should be expected at 45 degrees <= lambda <= 50 degrees, exceeding the 5 nT/s threshold for dangerous inductive heating.

引用

页码：668 / 681

页数：14

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