East-west movements of pulsating auroral-zone X-ray events

摘要: Abstract During simultaneous recordings by means of balloon-borne X-ray detectors, two cases pulsating auroral-zone electron precipitation events have been observed, which were moving from east to west along the auroral zone. Both observed between 07.00 and 09.00 hr L.T. They moved with velocities 120 150 km/min, had periods 300 500 sec, corresponding wavelengths about 600 1250 km respectively. superimposed upon beginning phase a more slowly varying event, seem represent modulation effects some travelling hydromagnetic wave main event.