300 citations · 2.9k across the 65 of their papers we have counts for
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Effect of the Heliospheric State on CME Evolution
Fithanegest Kassa Dagnew, Nat Gopalswamy, Solomon Belay Tessema +2
The culmination of solar cycle 24 by the end of 2019 has created the opportunity to compare the differing properties of coronal mass ejections (CMEs) between two whole solar cycles…
What is Unusual about the Third Largest Geomagnetic Storm of Solar Cycle 24?
N. Gopalswamy, S. Yashiro, S. Akiyama +4
We report on the solar and interplanetary (IP) causes of the third largest geomagnetic storm (2018 August 26) in solar cycle 24. The underlying coronal mass ejection (CME) originat…
The Relation between Type III Radio Storms and CIR Energetic Particles
Nat Gopalswamy, Pertti Mäkelä, Seiji Yashiro +2
We report on a study that compares energetic particle fluxes in corotating interaction regions (CIRs) associated with type III radio storm with those in nonstorm CIRs. In a case st…
Can Type III Radio Storms be a Source of Seed Particles to Shock Acceleration?
Nat Gopalswamy, Sachiko Akiyama, Pertti Mäkelä +2
An intense type III radio storm has been disrupted by a fast halo coronal mass ejection (CME) on 2000 April 4. The CME is also associated with a large solar energetic particle (SEP…
Solar Activity and Space Weather
Nat Gopalswamy, Pertti Mäkelä, Seiji Yashiro +2
After providing an overview of solar activity as measured by the sunspot number (SSN) and space weather events during solar cycles (SCs) 21-24, we focus on the weak solar activity…