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Dependence of radio emission in large H alpha flares 1967-1970 upon the orientation of the local solar magnetic fieldPublished data on ionizing radiation (as reflected in sudden ionospheric disturbances), H-alpha importance, 10-cm flux, dynamic spectrum, and 200-MHz flux are analyzed for a group of 84 solar flares (from 1967 to 1970) classified by Pudovkin and Chertkov (1976). The group consists of 29 flares with southern orientation of the 100,000-km-scale overlying magnetic field, 32 with northern orientation, and 23 with indeterminate orientation; all have H-alpha importance greater than about 2. Slightly greater X-ray and optical emissions, but one-order-of-magnitude greater prompt 200-MHz and 10-cm fluxes are found in southern as compared to northern-oriented flares. It is inferred that the amount of electromagnetic flare energy radiated promptly from the corona, as compared with that radiated from the chromosphere, was significantly affectly by the orientation of the overlying large-scale magnetic field during the period of observation. This trend is shown to be consistent despite some periodic variation.
Document ID
19830057822
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Roelof, E. C.
(Johns Hopkins Univ. Silver Spring, MD, United States)
Dodson, H. W.
(Johns Hopkins Univ. Silver Spring, MD, United States)
Hedeman, E. R.
(Johns Hopkins University Applied Physics Laboratory, Laurel, MD, United States)
Date Acquired
August 11, 2013
Publication Date
June 1, 1983
Publication Information
Publication: Solar Physics
Volume: 85
ISSN: 0038-0938
Subject Category
Solar Physics
Accession Number
83A39040
Funding Number(s)
CONTRACT_GRANT: N00024-81-C-5301
CONTRACT_GRANT: NSG-7055
Distribution Limits
Public
Copyright
Other

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