Abstract
THE shortest-lived structures in microwave solar flares known until now last ∼1 s. Recently (11 April 1978) we observed a microwave outburst at 2.65 GHz (starting at 13.41 UT) showing a strong and extremely fast fluctuating burst component. Many spikes appeared to have half-power durations smaller than the 20-ms resolution of the instrument used. These are about two orders of magnitude shorter-lived than events reported from previous microwave observations. They are only rivalled by fine structure in some decimetric type IV bursts between 0.4 and 1.4GHz (ref. 1).
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References
Dröge, F. Astr. Astrophys. 57, 285–290 (1977).
Svestka, Z. Solar Flares 174 (Reidel, Dordrecht, 1976).
Spicer, D. S. Solar Phys. 53, 305–345 (1977).
Kuijpers, J. Astr. Astrophys. (submitted).
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SLOTTJE, C. Millisecond microwave spikes in a solar flare. Nature 275, 520–521 (1978). https://doi.org/10.1038/275520a0
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DOI: https://doi.org/10.1038/275520a0
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