300 citations · 3.6k across the 79 of their papers we have counts for
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Properties and Geoeffectiveness of Magnetic Clouds during Solar Cycles 23 and 24
N. Gopalswamy, S. Yashiro, H. Xie +2
We report on a study that compares the properties of magnetic clouds (MCs) during the first 73 months of solar cycles 23 and 24 in order to understand the weak geomagnetic activity…
CMEs during the Two Activity Peaks in Cycle 24 and their Space Weather Consequences
N. Gopalswamy, P. Mäkelä, S. Akiyama +2
We report on a comparison between space weather events that occurred around the two peaks in the sunspot number (SSN) during solar cycle 24. The two SSN peaks occurred in the years…
The Mild Space Weather in Solar Cycle 24
Nat Gopalswamy, Sachiko Akiyama, Seiji Yashiro +3
The space weather is extremely mild during solar cycle 24: the number of major geomagnetic storms and high-energy solar energetic particle events are at the lowest since the dawn o…
High-energy solar particle events in cycle 24
Nat Gopalswamy, Pertti Makela, Seiji Yashiro +3
The Sun is already in the declining phase of cycle 24, but the paucity of high-energy solar energetic particle (SEP) events continues with only two ground level enhancement (GLE) e…
Kinematic and Energetic Properties of the 2012 March 12 Polar Coronal Mass Ejection
N. Gopalswamy, S. Yashiro, S. Akiyama
We report on the energetics of the 2012 March 12 polar coronal mass ejection (CME) originating from a southern latitude of ~60o. The polar CME is similar to low-latitude CMEs in al…
The Peculiar Behavior of Halo Coronal Mass Ejections in Solar Cycle 24
N. Gopalswamy, H. Xie, S. Akiyama +3
We report on a remarkable finding that the halo coronal mass ejections (CMEs) in cycle 24 are more abundant than in cycle 23, although the sunspot number in cycle 24 has dropped by…