For almost 30 hr after the major (gamma-ray) two-ribbon flare on 6 November 1980, 03 : 30 UT, the Hard X-Ray Imaging Spectrometer (HXIS) aboard the SMM satellite imaged in > 3.5 keV X-rays a gigantic arch extending above the active region over the limb. Like a similar configuration on 22 May 1980, t
On the outburst of flare activity of 26 November, 1973
✍ Scribed by Robert Howard; Zdeněk Švestka
- Book ID
- 104645298
- Publisher
- Springer
- Year
- 1981
- Tongue
- English
- Weight
- 281 KB
- Volume
- 71
- Category
- Article
- ISSN
- 0038-0938
No coin nor oath required. For personal study only.
✦ Synopsis
We draw attention of flare build-up observers to a strong 30 hour-long outburst of homologous flare activity and unusual growth and brightening of coronal loops, seen on Skylab. We suggest that these events might have been closely associated with newly emerging magnetic flux, in spite of the fact that the flux effects in Ha and EUV were first seen only late after the activity had started, and the flux emerged at the opposite end of the coronal loops from where the flares occurred.
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We use the filter ratio method of analysis to determine spatially resolved values of plasma parameters in the X-ray emitting post-flare loop system which developed on 29 and 30 July 1973. We find that the loops were hotter and had higher plasma pressure at their tops than near their footpoints. The
We present revised values of temperature and density for the flare loops of 29 July 1973 and compare the revised parameters with those obtained aboard the SMM for the two-ribbon flare of 21 May 1980. The 21 May flare occurred in a developed sunspot group; the 29 July event was a spotless two-ribbon