Equatorial Spread F (ESF) is a manifestation of ionospheric interchange instabilities in the nighttime equatorial F region. These instabilities generate plasma density irregularities with scale sizes ranging from centimetres to thousands of kilometres. The irregularities can be detected from a variety of instruments such as digisonde, coherent and incoherent scatter radars, in situ space probes, and airglow photometers. In the present study, occurrence statistics of the ESF, based on various parameters are presented using data obtained from the VHF radars located at three longitudinally separated equatorial stations: Christmas Island (2◦ N, 202.6◦ E, 2.9◦ N dip latitude), São Luís (2.59◦ S, 315.8◦ E, 0.5◦ S dip latitude) and Jicamarca (12◦ S, 283.1◦ E, 0.6◦ N dip latitude). The ESF parameters presented here are the onset altitude, onset time (onset refers to first app...