Ionospheric disturbances during November 30 to December 1, 1988. X - Ionospheric scintillations and total electron content observed by ETS-II satellite

Ionospheric disturbances during a geomagnetic storm on November 30 through December 1, 1988 are investigated by using data of the ionospheric total electron content and scintillations obtained by the ETS-II 136-MHz beacon experiment with routine ionosonde data along the same meridian. Significant enhancements in total electron content are noted as is the simultaneous occurrence of severe ionospheric scintillations in the lower-middle-latitude region after the sunset. The phenomena are theorized to be a consequence of the equatorial anomaly enhanced by an eastward field due to a magnetospheric source and an E x B instability leading to small-scale irregularities.