Solar X-ray bursts in relation to microwave bursts and SISs (sudden ionospheric disturbances).
Abstract
The paper analyzes different types of X-ray bursts recorded by Explorer 37 in the bands 0.5-3, 1-8, and 8-20 A in relation to their morphological types and peak time attainment, along with their correlations with the microwave bursts of different morphological types, intensity-based classes of H-alpha flares, and different types of sudden ionospheric disturbances (SIDs). X-ray bursts are found to be mainly of three morphological types: impulsive, gradual rise and fall, and gradual rise and quick fall. Impulsive X-ray bursts are mostly associated with bright H-alpha flares as well as with different microwave bursts and SIDs. The peak of X-ray bursts at a shorter wavelength is attained earlier than that at a longer wavelength. A major conclusion is that the simultaneous presence of X-ray and centimeter bursts can only ascertain the subsequent occurrences of SIDs. The percentage correlation of X-ray bursts with SIDs in the presence of microwave bursts is about twice as great as that in the absence of microwave bursts
- Publication:
-
Indian Journal of Radio and Space Physics
- Pub Date:
- March 1975
- Bibcode:
- 1975IJRSP...4...24M
- Keywords:
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- H Alpha Line;
- Microwave Emission;
- Solar Radio Emission;
- Solar X-Rays;
- Sudden Ionospheric Disturbances;
- Data Correlation;
- Explorer 37 Satellite;
- Satellite Observation;
- Solar Flares;
- Spaceborne Astronomy;
- Solar Physics