activity
20152022
most citedA new method to estimate annual solar wind parameters and contributions of different solar wind structures to geomagnetic activity

36 citations · 170 across the 8 of their papers we have counts for

collaborators
Showing 2017Show all

2 papers · 1 filter

physics.space-ph2017

Principal component analysis of geomagnetic activity: New information on solar wind

Kalevi Mursula, Lauri Holappa

We use the principal component analysis (PCA) to study geomagnetic activity at annual resolution using a network of 26 magnetic stations in 1966-2015, and an extended network of 40…

physics.space-ph2017★ 11 cited

Centennial evolution of monthly solar wind speeds: Fastest monthly solar wind speeds from long-duration coronal holes

Renata Lukianova, Lauri Holappa, Kalevi Mursula

High speed solar wind streams (HSSs) are very efficient drivers of geomagnetic activity at high latitudes. In this paper we use a recently developed parameter of geomagnetic…