Very intense geomagnetic storms: solar sources, characteristics and cycle distribution

被引：1

作者：

Szajko, Natalia ^{[1
]}

Cristiani, German ^{[1
]}

Mandrini, Cristina H. ^{[1
]}

Dal Lago, Alisson ^{[2
]}

机构：

[1] Inst Astron & Fis Espacio, Buenos Aires, DF, Argentina

[2] Inst Nacl Pesquisas Espaciais, Sao Paulo, Brazil

来源：

COMPARATIVE MAGNETIC MINIMA: CHARACTERIZING QUIET TIMES IN THE SUN AND STARS | 2012年 / 286期

关键词：

Sun: activity; Sun: coronal mass ejections (CMEs); interplanetary medium; CORONAL MASS EJECTIONS; ORIGIN;

D O I：

10.1017/S1743921312004930

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We revisit previous studies in which the characteristics of the solar and interplanetary sources of intense geomagnetic storms have been discussed. We consider the very intense geomagnetic storms that occurred during Solar Cycle 23 by setting a value of Dst(min) <= -200 nT as threshold. We have identified and characterized the solar and interplanetary sources of each storm. After this, we investigate the overall characteristics of the interplanetary (IP) main-phase storm driver, including the time arrival of the shock/disturbance at 1 AU, the type of associated IP structure/ejecta, the origin of a prolonged and enhanced southward component (B-Z) of the IP field, and other characteristics related to the energy injected into the magnetosphere during the storm.

引用

页码：250 / +

页数：3

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