Solar wind and magnetosheath observations during the January 13-14, 1967, geomagnetic storm
Abstract
The interplanetary, magnetosheath, and magnetotail plasmas were observed with electrostatic analyzers on the Vela 3A and 3B satellites at ∼18 RE during the January 13-14, 1967, geomagnetic storm. Various parts of the storm phenomenology were observed. The sudden commencement at 1202 UT on January 13 was caused by an interplanetary shock that passed the earth with a speed of ∼463 km sec-1, considerably lower than the probable average propagation speed from the sun of ∼720 km sec-1. During the initial phase and main phase development the magnetotail was either compressed or tilted up, or both. Just before the inward movement of the magnetopause observed with ATS 1 the solar wind velocity decreased and suddenly increased again by ∼55 km sec-1. During the main phase development the solar wind plasma population as observed by the Vela satellites was distinctly different from the initial phase population, as shown by the arrival of plasma with substantially increased density and alpha particle abundance. Near the peak of the main phase and later, magnetopause crossings showed that the magnetosphere was inflated.
- Publication:
-
Journal of Geophysical Research
- Pub Date:
- September 1968
- DOI:
- 10.1029/JA073i017p05761
- Bibcode:
- 1968JGR....73.5761B
- Keywords:
-
- Particles and Fields in Interplanetary Space: Solar-wind plasma;
- Particles and Fields in Interplanetary Space: Shock waves;
- Particles and Fields in the Earth's Magnetosphere: Interaction between solar wind and magnetosphere;
- Particles and Fields in the Earth's Magnetosphere: Magnetic storms