Centennial evolution of monthly solar wind speeds:fastest monthly solar wind speeds from long‐duration coronal holes

• Main Authors: Lukianova, R. (Renata), Holappa, L. (Lauri), Mursula, K. (Kalevi)
• Format: Article in Journal/Newspaper
• Language: English
• Published: American Geophysical Union 2017
• Subjects: Sodankylä
• Online Access: http://urn.fi/urn:nbn:fi-fe201903057167

Abstract High‐speed solar wind streams (HSSs) are very efficient drivers of geomagnetic activity at high latitudes. In this paper we use a recently developed ΔH parameter of geomagnetic activity, calculated from the nightside hourly magnetic field measurements of the Sodankylä observatory, as a prox...