Nighttime Magnetic Perturbation Events Observed in Arctic Canada: 2. Multiple‐Instrument Observations
Nighttime Magnetic Perturbation Events Observed in Arctic Canada: 2. Multiple‐Instrument Observations
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加拿大北极地区观测到的夜间磁扰事件：2. 多仪器观测
DOI：
10.1029/2019ja026797
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发表时间：
2019
期刊：
影响因子：
--
通讯作者：
Weygand, J. M.
中科院分区：
文献类型：
--
作者：
Engebretson, M. J.;Steinmetz, E. S.;Posch, J. L.;Pilipenko, V. A.;Moldwin, M. B.;Connors, M. G.;Boteler, D. H.;Mann, I. R.;Hartinger, M. D.;Weygand, J. M.
与夜间振幅磁扰动有关的磁场快速变化|ΔB|数百纳米特斯拉和5至10分钟的周期可以引起地磁感应电流的爆发，这可能会损害技术系统。本文介绍了2015年加拿大北极东部强烈而复杂的夜间磁扰动的三个案例，并通过极光成像仪和高海拔航天器在夜侧磁层的观测进行了增强。每个病例都发生在亚暴发生后1小时内。在磁暴的主要阶段没有发生，只有在早期恢复阶段（中等风暴）的第一次。这些情况相似，在该区域约1小时的时间内发生了两个或三个间隔;这些情况显示了空间进展，在更西部和北方的台站发生了连续的间隔。在几个时间间隔内，个别peakBximpulses几乎同时发生（1-2分钟内）在几个站，而在其他脉冲发生后，在更西部和北方站，在一个时间间隔内，他们发生后，在南部站。在这两种情况下，极光的图像是可用的，向西旅行浪涌和极向极光扩展和/或极向边界强化发生，并在两个事件极光流光正好在时间和位置与磁扰动。这些意见似乎是一致的几个早期的研究连接夜间磁扰动事件本地化极光结构和双极化通量束和突发性的整体流量在磁尾。
The rapid changes of magnetic fields associated with nighttime magnetic perturbations with amplitudes |ΔB| of hundreds of nanoteslas and 5‐ to 10‐min periods can induce bursts of geomagnetically induced currents that can harm technological systems. This paper presents three cases of intervals of intense and complex nighttime magnetic perturbations in eastern Arctic Canada in 2015, augmented by observations from auroral imagers and high‐altitude spacecraft in the nightside magnetosphere. Each case occurred within 1 hr after substorm onsets. None occurred during the main phase of a geomagnetic storm, and only the first during the early recovery phase (of a moderate storm). The cases were similar in that two or three intervals occurred in this region over a span of ~1 hr; these showed a spatial progression, in that successive intervals occurred later at more western and northern stations. During several intervals, individual peakBximpulses occurred nearly simultaneously (within 1–2 min) at several stations, while during others the impulses occurred later at more western and northern stations, and during one interval they occurred later at southern stations. During both of the cases for which auroral images were available, a westward traveling surge and a poleward auroral expansion and/or poleward boundary intensification occurred, and during two events auroral streamers coincided in time and location with magnetic perturbations. These observations appear to be consistent with several earlier studies connecting nighttime magnetic perturbation events to localized auroral structures and to dipolarizing flux bundles and bursty bulk flows in the magnetotail.
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DOI：
10.1029/2019ja026794
发表时间：
2019-09
期刊：
Journal of Geophysical Research: Space Physics
影响因子：
--
作者：
Mark J. Engebretson;V. Pilipenko;L. Ahmed;J. Posch;E. Steinmetz;M. Moldwin;Martin G. Connors
通讯作者：
Mark J. Engebretson;V. Pilipenko;L. Ahmed;J. Posch;E. Steinmetz;M. Moldwin;Martin G. Connors
极光亚暴爆发与传统地磁爆发特征之间的区别
DOI：
--
发表时间：
2013
期刊：
影响因子：
--
作者：
L. Lyons;Y. Nishimura;E. Donovan;V. Angelopoulos
通讯作者：
V. Angelopoulos
影响因子：
5.2
作者：
S. Solovyev;D. Baishev;E. Barkova;N. E. Molochushkin;K. Yumoto
通讯作者：
S. Solovyev;D. Baishev;E. Barkova;N. E. Molochushkin;K. Yumoto
2015 年 3 月 17 日风暴的地面地磁场和 GIC 响应
DOI：
10.1186/s40623-018-0933-2
发表时间：
2018
期刊：
Earth, Planets and Space
影响因子：
--
作者：
O. Kozyreva;V. Pilipenko;V. Belakhovsky;Y. Sakharov
通讯作者：
Y. Sakharov
加拿大魁北克省的 AUTUMNX 磁力计子午线链
DOI：
--
发表时间：
2016
期刊：
Earth, Planets and Space
影响因子：
--
作者：
M. Connors;I. Schofield;K. Reiter;P. Chi;K. Rowe;C. Russell
通讯作者：
C. Russell