L. Holappa

activity

20182022

most citedMagnetic storms during the space age: Occurrence and relation to varying solar activity

31 citations · 38 across the 2 of their papers we have counts for

collaborators

3 papers

astro-ph.SR2022★ 31 cited

Magnetic storms during the space age: Occurrence and relation to varying solar activity

Kalevi Mursula, Timo Qvick, Lauri Holappa +1

We study the occurrence of magnetic storms in space age (1957-2021) using Dst and Dxt indices. We find 2526/2743 magnetic storms in the Dxt/Dst index, out of which 45% are weak, 40…

physics.space-ph2019★ 7 cited

Explicit IMF $B_{y}$ -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 $B_{z}$ -component of the interplanetary magnetic field (IMF). However, recent studies…

astro-ph.EP2018

Explicit IMF $B_{y}$ -dependence in high-latitude geomagnetic activity

Lauri Holappa, Kalevi Mursula

The interaction of the solar wind with the Earth's magnetic field produces geomagnetic activity, which is critically dependent on the orientation of the interplanetary magnetic fie…

Magnetic storms during the space age: Occurrence and relation to varying solar activity

Explicit IMF By​-effect maximizes at subauroral latitudes (Dedicated to the memory of Eigil Friis-Christensen)

Explicit IMF By​-dependence in high-latitude geomagnetic activity

Explicit IMF $B_{y}$ -effect maximizes at subauroral latitudes (Dedicated to the memory of Eigil Friis-Christensen)

Explicit IMF $B_{y}$ -dependence in high-latitude geomagnetic activity