422 citations · 4.7k across the 113 of their papers we have counts for
6 papers · 1 filter
The impact of CMEs on the critical frequency of F2-layer ionosphere (foF2)
Alene Seyoum, Nat Gopalswamy, Melessew Nigussie +1
The ionospheric critical frequency (foF2) from ionosonde measurements at geographic high, middle, and low latitudes is analyzed with the occurrence of coronal mass ejections (CMEs)…
On the properties of solar energetic particle events associated with metric type II radio bursts
Pertti Mäkelä, Nat Gopalswamy, Hong Xie +3
Metric type II solar radio bursts and solar energetic particles (SEPs) are both associated with shock fronts driven by coronal mass ejections (CMEs) in the solar corona. Recent stu…
Explicit IMF -effect maximizes at subauroral latitudes (Dedicated to the memory of Eigil Friis-Christensen)
Lauri Holappa, Nat Gopalswamy, Kalevi Mursula
The most important parameter in the coupling between solar wind and geomagnetic activity is the -component of the interplanetary magnetic field (IMF). However, recent studies…
Using the Coronal Evolution to Successfully Forward Model CMEs' In Situ Magnetic Profiles
C. Kay, N. Gopalswamy
Predicting the effects of a coronal mass ejection (CME) impact requires knowing if impact will occur, which part of the CME impacts, and its magnetic properties. We explore the rel…
Deflection and Rotation of CMEs from Active Region 11158
C. Kay, N. Gopalswamy, H. Xie +1
Between the 13 and 16 of February 2011 a series of coronal mass ejections (CMEs) erupted from multiple polarity inversion lines within active region 11158. For seven of these CMEs…
Understanding space weather to shield society: A global road map for 2015-2025 commissioned by COSPAR and ILWS
Carolus J. Schrijver, Kirsti Kauristie, Alan D. Aylward +23
There is a growing appreciation that the environmental conditions that we call space weather impact the technological infrastructure that powers the coupled economies around the wo…