Abstract
The analysis of conjugate observations of quasiperiodic (QP) emissions by a ground-based instrument (Kannuslehto, Northern Finland) and spacecraft (Van Allen Probes) is presented. Altogether, 26 events observed between September 2012 and November 2017 were analyzed.
The study focuses on the magnetic local time evolution of the events observed at different locations at different times. It is confirmed that the structure of QP elements is conserved over a large spatial extent, while their intensity can change significantly.
This is observed when the events were detected by more instruments and their structure remains the same for all measurements. The QP occurrence with respect to the plasmapause location was further analyzed.
The magnetic local time separation between instruments at the times of the events was typically lower than 4 hours.