Disturbance in the Magnetic Field

The great geomagnetic storm from 29 Octobre 2003 encountered the Magnetometers on Neumayer-Base/Antarctica at 06:12 am. During 42 minutes the Totalintensity of the Earthmagneticfield decreased from 39144 nT to 35733 nT at 06:54 am. The highest value of the Totalintensity with 40109 nT was reached few hour later at the same day on 09:17 am. The strong solaractivity still disturbs the Earthmagneticfield around Neumayer Base, and one day after arrival of the Solar Particalstream the Magnetograms shows on 30 Octobre 2003 at 08:00 am a powerful oscillation, that lasts approximaley 40 minutes. The Pulsation had a period of 10 minutes and was observered both on horizontal- and vertikalkomponents of the Earthmagneticfield. This is reported by Bettina Bayer and Carl Dietrich Lange, scientist at Neumayer Station in Antarctica.