A Study of the Correlation between Enhanced LHR, VLF Turbulences and Earthquakes

Lower Hybrid Resonance (LHR) frequency in the ionosphere is influenced by the plasma density and the temperature. Variations in the same two governing factors are indicators of earthquakes. Hence, observing the variations of LHR is important as an indirect precursor of earthquakes. At the same time some correlations were observed with the earthquakes and ionospheric Very Low Frequency (VLF) turbulences. In this work we analyze data collected by the Radio Receiver Instrument (RRI) on the enhanced Polar Outflow Probe (e-POP) for LHR and VLF turbulences and compare our records with the United States Earthquake database.