The decameter spikes as a tool for the coronal plasma parameters determination

The paper is devoted to the analysis of the unusual event observed on 14 June 2012 in the frequency range 8-42 MHz. During this event the radiation flux changed stepwise two times. Assuming that these changes of radiation flux could be associated with the changes of the coronal plasma parameters (temperature, magnetic field) and using spikes as a tool for the determination of those parameters we traced how the temperature and magnetic field varied during the time of observations. According to the model proposed in the paper the magnetic field was about 1.9 G and the temperature varied in the range of 0.1-0.6 × 10
⁶
K at the heights 1.6-3.3 solar radii.