Reply

• A. G. Yahnin,
• V. A. Sergeev,
• B. B. Gvozdevsky,
• S. Vennerstrom

Affiliations

A. G. Yahnin

Polar Geophysical Institute, Apatity, Murmansk region, 184200, Russia; Tel.: +7-815-55-79475; Fax: +7-815-55-74330;<br>e-mail: [email protected]

V. A. Sergeev

Institute of Physics, University of St. Petersburg, St. Petersburg, Russia

B. B. Gvozdevsky

Polar Geophysical Institute, Apatity, Murmansk region, 184200, Russia; Tel.: +7-815-55-79475; Fax: +7-815-55-74330;<br>e-mail: [email protected]

S. Vennerstrom

Danish Meteorological Institute, Solar-Terrestrial Physics Division, Copenhagen, Denmark