Аннотация:Analysis of the space weather periods associated with five events of the supersubstorms (SSS) was carried out. Two magnetic storms, on 8 September 2017 and 09 March 2012, have been studied. During these two storms, there were registered 5 supersubstorms. It was shown that the onsets of the SSS events were preceded by strong jumps in the dynamic pressure and density of the solar wind, which were observed against the background of a high solar wind speed. Besides, the high values of the Interplanetary Magnetic Field (IMF BT > 10 nT) and high values of the southern ВZ component of the IMF were also observed before the SSS occurrence. In additional, the values of the BY component of the IMF were small positive or turned from negative to positive values.