Narrowband Spikes Observed During the 13 June 2012 Flare in the 800 – 2000 MHz Range

Narrowband (∼5 MHz) and short-lived (∼0.01 s) spikes with three different distributions in the 800 – 2000 MHz radio spectrum of 13 June 2012 flare are detected analyzed. We designate them as SB (spikes distributed a broad band or bands), SZ zebra-like bands) SBN narrow bands). On analyzing AIA/SDO images active region NOAA 11504, rough correspondence between groups observed at 1000 peaks time profiles AIA channels taken from subarea close to leading sunspot is found. Among types type most interesting because it resembles zebras. Therefore, using autocorrelation crosscorrelation methods we compare typical zebra same frequency range. While ratio frequencies their separation (220 about 4, 5, 6, stripe 24 around 50. Moreover, bandwidth bands, which consists clouds narrowband spikes, much broader than that stripes. This comparison indicates generated way zebra, but similar spikes. successfully fit by Bernstein modes. Based on this fitting interpret those model Thus, magnetic field plasma density spike source estimated be 79 G 8.4 × 109 cm−3, respectively.