Results 21 to 30 of about 295,213 (157)

Torsional Alfvén Wave Embedded ICME Magnetic Cloud and Corresponding Geomagnetic Storm [PDF]

Astrophysical Journal, 2018
Energy transfer during the interaction of large-scale solar wind structure and the Earth’s magnetosphere is a chronic issue in space-weather studies. To understand this, researchers widely studied the geomagnetic storm and substorm phenomena. The present
Anil N. Raghav, A. Kule, A. Bhaskar, W. Mishra, G. Vichare, Shobha Surve   +5 more
semanticscholar   +1 more source

Study of the Equatorial and Low‐Latitude Electrodynamic and Ionospheric Disturbances During the 22–23 June 2015 Geomagnetic Storm Using Ground‐Based and Spaceborne Techniques

Journal of Geophysical Research - Space Physics, 2018
We use a set of ground‐based instruments (Global Positioning System receivers, ionosondes, magnetometers) along with data of multiple satellite missions (Swarm, C/NOFS, DMSP, GUVI) to analyze the equatorial and low‐latitude electrodynamic and ionospheric
E. Astafyeva, I. Zakharenkova, K. Hozumi, P. Alken, P. Coïsson, M. Hairston, W. Coley   +6 more
semanticscholar   +1 more source

What is a geomagnetic storm

, 1994
After a brief review of magnetospheric and interplanetary phenomena for intervals with enhanced solar wind-magnetosphere interaction, an attempt is made to define a geomagnetic storm as an interval of time when a sufficiently intense and long-lasting ...
W. Gonzalez, J. Joselyn, Y. Kamide, H. Kroehl, G. Rostoker, B. Tsurutani, V. Vasyliūnas   +6 more
semanticscholar   +1 more source

The Great Space Weather Event during February 1872 Recorded in East Asia

, 2018
The study of historical great geomagnetic storms is crucial for assessing the possible risks to the technological infrastructure of a modern society, caused by extreme space-weather events.
Ebihara, Yusuke, Giunta, Alessandra S., Hattori, Kentaro, Hayakawa, Hisashi, Hayakawa, Satoshi, Macdonald, Lee T., Mitsuma, Yasuyuki, Shibata, Kazunari, Silverman, Sam M., Toriumi, Shin, Wild, Matthew N., Willis, David M.   +11 more
core   +1 more source

The Highest Geomagnetic Storms of the Solar Cycle Observed at Ground Level [PDF]

, 2018
We report two ground-level observations, of geomagnetic storms of different origins; they are among the highest geomagnetic storms, in the solar Cycle 24. The first is St.
Augusto, Carlos R. A., de Oliveira, Marcel N., Navia, Carlos E.   +2 more
core   +2 more sources

An Optical Analysis of Sunspots as Predictors of Geomagnetic Storms [PDF]

arXiv, 2023
Although a variety of phenomena may create a geomagnetic storm on Earth, the most severe geomagnetic storms arise from solar activity, and in particular, coronal mass ejections (CMEs) and solar flares. CMEs and flares originate primarily from sunspots. The "aa index" is a metric which ranks all of the strongest geomagnetic storms between 1868 and 2010 ...
arxiv  

Cosmic ray short burst observed with the Global Muon Detector Network (GMDN) on June 22, 2015 [PDF]

, 2018
We analyze the short cosmic ray intensity increase ("cosmic ray burst": CRB) on June 22, 2015 utilizing a global network of muon detectors and derive the global anisotropy of cosmic ray intensity and the density (i.e.
Braga, C. R., Duldig, M. L., Evenson, P., Humble, J. E., Jassar, H. K. Al, Kato, C., Kota, J., Kozai, M., Kuwabara, T., Lago, A. Dal, Mendonca, R. R. S., Munakata, K., Rockenbach, M., Sabbah, I., Schuch, N. J., Sharma, M. M., Tokumaru, M.   +16 more
core   +2 more sources

Understanding the Behaviors of Thermospheric Nitric Oxide Cooling During the 15 May 2005 Geomagnetic Storm

Journal of Geophysical Research: Space Physics, 2019
The behaviors of thermospheric nitric oxide (NO) cooling during the 15 May 2005 intense geomagnetic storm are studied using measurements by the Sounding of the Atmosphere using Broadband Emission Radiometry instrument on board the Thermosphere‐Ionosphere‐
Zheng Li, D. Knipp, Wenbin Wang
semanticscholar   +1 more source

Whether duration of the recovery phase of magnetic storm depends on the development rate of storm at its main phase? [PDF]

Geomagnetism and Aeronomy, Vol. 55, No. 4, pp. 421-424, 2015, 2014
We compare dependences between the storm development rate $|Dst_{min}|/\Delta T$ ($\Delta T$ is the durations of main phase) and the duration of recovery phase of magnetic storms generated by three various types of interplanetary drivers: (1, 2) compression regions CIR and Sheath, and (3) body of interplanetary CME (magnetic clouds and Ejecta).
arxiv   +1 more source

Geoeffectiveness of Coronal Mass Ejections in the SOHO era

, 2014
The main objective of the study is to determine the probability distributions of the geomagnetic Dst index as a function of the coronal mass ejection (CME) and solar flare parameters for the purpose of establishing a probabilistic forecast tool for the ...
Devos, Andy, Dumbovic, Mateja, Leer, Kristoffer, Rodriguez, Luciano, Ruzdjak, Domagoj, Sudar, Davor, Vennerstrom, Susanne, Veronig, Astrid, Vrsnak, Bojan   +8 more
core   +1 more source