Anomalous geomagnetic storm of 21-22 January 2005: A storm main phase during northward IMFs

The driving mechanisms of particle precipitation during the moderate geomagnetic storm of 7 January 2005

The arrival of an interplanetary coronal mass ejection (ICME) triggered a sudden storm commencement (SSC) at ∼09:22 UT on the 7 January 2005. The ICME followed a quiet period in the solar wind and interplanetary magnetic field (IMF). We present global scale observations of energetic electron precipitation during the moderate geomagnetic storm driven by the ICME. Energetic electron precipitation...

GPS phase scintillation and proxy index at high latitudes during a moderate geomagnetic storm

The amplitude and phase scintillation indices are customarily obtained by specialised GPS Ionospheric Scintillation and TEC Monitors (GISTMs) from L1 signal recorded at the rate of 50 Hz. The scintillation indices S4 and σ8 are stored in real time from an array of high-rate scintillation receivers of the Canadian High Arctic Ionospheric Network (CHAIN). Ionospheric phase scintillation was obser...

Geomagnetic storm effects on GPS based navigation

The energetic events on the sun, solar wind and subsequent effects on the Earth’s geomagnetic field and upper atmosphere (ionosphere) comprise space weather. Modern navigation systems that use radio-wave signals, reflecting from or propagating through the ionosphere as a means of determining range or distance, are vulnerable to a variety of effects that can degrade the performance of the naviga...

Tail - dominated storm main phase : 31 March 2001

[1] On 31 March 2001 a fast solar wind transient with strong southward interplanetary magnetic field Bz produced a large geomagnetic storm at Earth, with a drop in the Dst index to 350 nT between 0400 and 0900 UT. The Earth’s magnetosphere was very compressed during this interval, with the bow shock crossing geosynchronous orbit on at least two occasions. Here we present space-based and ground-...

Auroral Disturbances During the January 10 , 1997 Magnetic Storm