First ever VLF monitoring of the lunar occultation of a solar flare during the 2010 annular solar eclipse and its effects on the D-region electron density profile

► Occultation of a X-ray solar flare by lunar disk during annular solar eclipse 2010. ► Monitored for the first time using ground based VLF monitoring system. ► The results are compared with different satellites data. ► Time frame of blocking the hard and soft X-rays emitting region supported VLF observations. ► Electron density profile in the D-region of the ionosphere during the event.