Records of Dst, Kp and Sym-H indexes are analyzed looking for evidences of possible precursors for magnetic storms. To accomplish this task the main magnetic storms were located and some periods immediately before storms and some periods well before them studied. Statistical properties of both types of periods were then compared. In particular, were compared the slopes of the power laws that have been found for the distributions of indexes values. A systematic deviation was found between both distributions for the Kp index. It was no so for Dst and Sym-H indexes. For the three indexes it was found a correlation between slopes and the corresponding storm intensity, which could serve as a probabilistic approach to magnetic storms forecasting. The data for the analysis was obtained at the World Data Centre for Geomagnetism at Kyoto.
Statistical properties of geomagnetic measurements as possible precursors for magnetic storms
地磁测量记录被分析，寻找磁暴可能前兆的证据。在此基础上，对1998-2002年的主要磁暴进行了Dst指数定位。采用最近在文献中介绍的方法，对风暴前的时期和风暴前的时期进行了研究。两种类型的期间的统计特性进行了比较。其中一个比较的数量是已经发现的一些相关分布的幂律的斜率。发现了斜率分布之间的系统偏差，这可能是记录中非自组织成分的指纹。还发现了斜率值和相应的风暴强度之间的相关性，这可以作为磁暴预报的概率方法。数据来自低纬度Vassouras Magnetic Observatory。
Comment on "A statistical comparison of solar wind sources of moderate and intense geomagnetic storms at solar minimum and maximum" by Zhang, J.-C., M. W. Liemohn, J. U. Kozyra, M. F. Thomsen, H. A. Elliott, and J. M. Weygand, JGR, 2006
Geomagnetically Induced Currents in the Irish Power Network during Geomagnetic Storms
地磁感应电流是地球空间天气的一种常见危害。它们发生在电力传输网络中，已知在高纬度和中纬度国家都有不利影响。在这里，我们研究了五次地磁风暴（2016年3月6日至7日、2015年12月20日至21日、2015年3月17日至18日、2003年10月29日至31日和1989年3月13日至14日）期间爱尔兰输电网络（地磁纬度54.7--58.5 $^{\circ}$ N）中的GIC。本文采用平面波法模拟了大地电场，并建立了大地电磁模型。然后计算了220、275和400 kV输电网络的GIC。在所研究的最大风暴期间，用我们的MT模式计算的峰值电场高达3.8 V km \textsuperscript{-1}，伴随的GIC高达23 A。用均匀电阻率模型计算，其峰值分别为1.46 V km \textsuperscript{-1}和25.8 A.我们发现，三个400和275千伏变电站是最有可能的位置，爱尔兰Transformers经历大GIC。
Multi-instrument constraints on a hemispherically asymmetric positive ionospheric storm in the 60-180 deg E sector during the 12-13 November 2025 geomagnetic storm
Institute of Earthquake Forecasting, China Earthquake Administration（中国地震局地震预测研究所）；National Space Science Center, Chinese Academy of Sciences（中国科学院国家空间科学中心）；Department of Land Surveying and Geo-Informatics, The Hong Kong Polytechnic University（香港理工大学土地测量及地理资讯学系）；Istituto Nazionale di Geofisica e Vulcanologia（意大利国家地球物理与火山学研究所）；Space Research Institute, Russian Academy of Sciences（俄罗斯科学院太空研究所）
Influence of ICME-driven Magnetic Cloud-like and Sheath Region induced Geomagnetic Storms in causing anomalous responses of the Low-latitude Ionosphere: A Case Study
The Gannon Storm: Citizen science observations during the geomagnetic superstorm of 10 May 2024
University of Helsinki（赫尔辛基大学）；Finnish Meteorological Institute（芬兰气象研究所）；Sodankylä Geophysical Observatory, University of Oulu（奥卢大学索德卡尔皮欧地球物理观测站）；Taivaanvahti/Skywarden Observation Service, Ursa Astronomical Association（Ursa天文协会Taivaanvahti/Skywarden观测服务）；Geophysical Institute, University of Alaska Fairbanks（阿拉斯加费尔班克斯大学地球物理研究所）；Aurorasaurus, New Mexico Consortium（新墨西哥联盟Aurorasaurus）；University Centre in Svalbard（斯瓦尔巴群岛大学中心）；Université Grenoble Alpes, CNRS, IPAG（格勒诺布尔阿尔卑斯大学CNRS IPAG）；Université Grenoble Alpes, CSUG（格勒诺布尔阿尔卑斯大学CSUG）；Center for Space Physics, Astronomy Department, Boston University（波士顿大学天文学系空间物理中心）；University of Southampton（南安普顿大学）；Goddard Space Flight Center, National Aeronautics and Space Administration（美国国家航空航天局戈达德太空飞行中心）；Department of Physics, The Catholic University of America（美利坚天主教大学物理系）；Department of Electrical and Computer Engineering and Center for Space Physics, Boston University（波士顿大学电气与计算机工程系及空间物理中心）
Degradation of signals and operation failures of radio engineering satellite systems during geospace disturbances accompanied by abrupt changes in the geomagnetic field
Predicting low-latitude ionospheric Total Electron Content (TEC) over the Indian sector under variable space weather conditions using solar wind parameters
Indian Institute of Geomagnetism（印度地磁研究所）；School of Environmental Science, Jawaharlal Nehru University（贾瓦哈拉尔·尼赫鲁大学环境科学学院）
