Pioneer 8 observations and interpretations of sixteen interplanetary shock waves observed in 1968
A study was made of 16 interplanetary shock waves observed in 1968 by Pioneer 8 at large distances from earth. A comparison with the shapes of interplanetary shock fronts obtained by De Young and Hundhausen (1971) suggests that in general the ejection of flare gas occurs within a cone of half-angle between 30 and 80 deg . For near-earth events a deflection of the shock front was observed, possibly owing to an interaction with the bow shock. The average duration of the post shock perturbation is about 20 hours. Strong magnetic fields and rapid fluctuations occur during the first 8 to 12 hours. Electric field perturbations in the VLF band are also noted during these periods. There is limited evidence for one corotating shock in these data. Unfortunately, no plasma data are available for the comparison and the interpretation of corresponding analyses. (auth)
- Research Organization:
- Univ., Rome
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-29-027618
- OSTI ID:
- 4306957
- Journal Information:
- J. Geophys. Res., v. 78, no. 22, pp. 4535-4546, Other Information: Orig. Receipt Date: 30-JUN-74
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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