Effects associated with the sector boundary crossing on July 8, 1966
✍ Scribed by Z. Švestka
- Publisher
- Springer
- Year
- 1968
- Tongue
- English
- Weight
- 621 KB
- Volume
- 4
- Category
- Article
- ISSN
- 0038-0938
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✦ Synopsis
Thirty hours ariel" the proton flare of July 7, 1966, the earth and nearby satellites crossed a sector boundary of the interplanetary magnetic field. This occurred before the flare-associated shockwave arrived at the earth, so that the space was filled with energetic particles ejected from the flare. Satellite measurements have shown that in such a case < 20 MeV protons are stored within the range of the sector boundary and with decreasing energy the particles tend to accumulate towards and behind the Eastern boundary limit; low-energy particles, such as < 50 keV electrons, are stored exclusively behind this Eastern limit.
The boundary crossing caused a short-lived geomagnetic disturbance, a PCA enhancement in lower latitudes, a two-phase ionospheric disturbance, and a transient cosmic-ray decrease on neutron monitors looking westward immediately after the sector boundary passed the earth. The storage of low-energy particles on the Eastern side of the boundary may indicate a preference of the transverse diffusion for the Westward direction in interplanetary space.
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