CHANGES IN SUNSPOT AND FLOCCULAR SOURCES OF RADIO EMISSION PRECEDING AN IMPORTANCE 2N FLARE ON 23 AUGUST 1988

Based on observations from the Siberian solar radio telescope, and invoking data from other observatories, we investigate preflare changes in the sunspot and floccular sources of radio emission and the development of an importance 2N flare in the chromosphere and corona in the active region on Augus...

Full description

Saved in:
Bibliographic Details
Published in:Solar physics 1997-07, Vol.173 (2), p.305-318
Main Authors: Agalakov, B V, Ledenev, V G, Lubyshev, B I, Nefedyev, V P, Yazev, S A, Zubkova, G N, Kerdraon, A, Urbarz, H W
Format: Article
Language:English
Subjects:
Emissions
Fluctuations
Solar physics
Sun
Wavelengths
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Based on observations from the Siberian solar radio telescope, and invoking data from other observatories, we investigate preflare changes in the sunspot and floccular sources of radio emission and the development of an importance 2N flare in the chromosphere and corona in the active region on August 23, 1988. It has been ascertained that preflare changes became observable six hours prior to the flare onset and manifested themselves in intense flux fluctuations above the sunspot and in an enhancement of the source emission flux above the flocculus. It is shown that the flare onset is associated with a newly emerged magnetic flux in the form of a pore near the filament and with the appearance of radio sources above the filament. The flare was accompanied by type III radio bursts and a noise storm at meter wavelengths. Coronal mass ejection parameters are estimated from type III burst observations.[PUBLICATION ABSTRACT]
ISSN:0038-0938
1573-093X
DOI:10.1023/A:1004941026372