SM13E-2556
The Occurrence and Characteristics of Low Latitude Ultra-Low Frequency Waves in Egypt
Monday, 14 December 2015
Poster Hall (Moscone South)
Essam Ghamry1, Ahmed Lethy2 and Tareq Arafa-Hamed2, (1)National Research Institute of Astronomy and Geophysics, Helwan, Egypt, (2)NRIAG, Helwan, Egypt
Abstract:
We have examined the ULF wave activities in the Egyptian observatories (Misallat and Abu Simbel) using high resolution geomagnetic field data. The fluctuations detected at Misallat (L = 1.23) and Abu Simbel (L = 1.07) ground magnetometers data during last three years have been investigated in the range of 1-100 mHz (Pi2, Pc3, Pc4 and Pc5 micropulsations). A typical Pc3–4 pulsation contains a field line resonance and an upstream wave contribution. We focused on night-time events (1800-0600 local time) which show all the characteristics of Pi2 pulsations. This study suggests that low-latitude Pi2 pulsations detected at the two Egyptian observatories caused by plasmaspheric cavity mode resonance.
