CAOSP abstracts, Volume: 29, No.: 2, year: 1999
- Author(s): ANTALOVA, A.
- Journal: [SUPPLEMENT] Contributions of the Astronomical Observatory Skalnate Pleso Supplement,
vol. 29, no. 2, p. 163-172.
- Date: 10/1999
- Title: Soft X-ray flare indices in 1981 and 1982 years
- Keyword(s): THE SUN, LDE TYPE FLARES, IMPULSIVE FLARES, FLARE INDEX (FI)
- Pages: 163 -- 172
Abstract:
The heliographic longitudinal distribution of the daily soft X-ray flare
index (FI) values is given for 1981 and 1982 years (Table 1). The days, when
FI exceeds the value 500 (300) are indicators of extremely large LDE activity
and they are as follows: 1979 - 3 (6) days; 1980 - 3 (12); 1981 - 6 (16) and
maximum in 1982 - 8 (16) days. The FI was determined from the daily continuous
SMS-GOES profile of the solar soft X-ray flux (0.1-0.8 nm), as published in
SGD. The left (right) columns of Table 1 comprise the 1981 (1982) daily data.
The Eastern (E), Central (C) and Western (W) distribution of the LDE--type FIs,
as well as a daily FI computed from the impulsive (I)-type flares, were so far
published from 1969 to 1982.
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