Analysis of solar flare in CaII K on 1989 March 13

Details Analysis of solar flare in CaII K on 1989 March 13 Analysis of solar flare in CaII K on 1989 March 13

Mar 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992basi...20..231j&link_type=abstract

Astronomical Society of India, Bulletin (ISSN 0304-9523), vol. 20, no. 2, p. 231-241.

Astronomy and Astrophysics

Astronomy

1

Calcium, Solar Flares, Umbras, Magnetic Field Configurations, Solar Magnetic Field, Solar Prominences, Solar Radio Bursts, Solar X-Rays

Scientific paper

We report the CaII K observations of a major umbral solar flare of optical class 3B which occurred on 1989 March 13. Correlated optical, microwave, soft X-ray (SXR), sudden ionospheric disturbance observations and the resulting proton enhancements have also been analyzed. The values of magnetic field perpendicular to electron velocity electron energy E and angular size of a great microwave burst (GB) source are estimated as 897 gauss, 1.4 MeV, and 7 arcsec, respectively. Due to the production of long-duration hard X-ray burst and GB, we conclude that the observed flare is very energetic.

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