Phase-lock observation in the same format as Fig. 5 in the manuscript. The observation is from 29 August 2012 to 2 September 2012. The blue dashed line shows the “disturbed phase lock” or “loss of phase lock” feature. The occurrence sequence of the radio component changes from the “typical” phase-lock sequence. The “disturbed” feature could be due to the external influence of the magnetosphere, as indicated by the later enhancement of the SKR.