Ionosphere is an important layer of atmosphere which is under constant forcing from both below due to gravitational,geomagnetic and seismic activities,and above
Space weather phenomena cause satellite to ground or satellite to aircraft transmission outages over the VHF to L-band frequency range, particularly in the low latitude region. Global Positioning Syst
South and north-dipping nodal planes from the U.S. Geological Survey moment tensor solution were used to invert global teleseismic body waves to reveal the sour