资源环境科技发展态势分析平台

A recent study (Grono & Donovan, 2018, https://doi.org/10.5194/angeo-36-891-2018) reported two distinct categories of pulsating aurora: patchy pulsating aurora (PPA) and amorphous pulsating aurora (APA). In this study we compare the auroral intensity of five PPA events and seven APA events monitored by the Time History of Events and Macroscale Interactions during Substorms (THEMIS) All-Sky Imagers with co-located cosmic noise absorption (CNA) from the Geospace Observatory wide-beam riometers. Our results show significant correlations between CNA and the auroral intensity of the APA events but no correlation between CNA and the auroral intensity of the PPA events. Analysis of conjunctions with the electron flux data obtained from the FAST satellite, we found that electrons responsible for APA may extend to higher energy range than those for PPA.