Abstract: Guangzhou Ionospheric Observatory is located near the geomagnetic equator (geomagnetic coordinate 183.0°E, 11.5°N). According to the analysis of the data from 18 ionospheric stations, Guangzhou Observatory is at the north crest of the double-crest where f₀F₂ reaches its maximum value. During high solar activity years, the maximum value of f₀F₂ in the diurnal variation occurs even at night-time, in addition, the occuring frequency of the ionospheric disturbances is higher than that of other observatories in China. These characteristics are all considered as the anomalies of the equatorial F₂-layer.