With the increasing researches in the understanding of the ionospheric irregularities' behaviour near the magnetic equator, an attempt has been made to study the impact of magnetic activity on occurrence of Amplitude Scintillation (S_4) over Lagos, Nigeria. The occurrence rate of international quiet (Q) and international disturbed (D) days were examined compared for five days. The occurrences of S4 were recorded during quiet days than the disturbed days in the study area, except in September where there were more S_4 during disturbed days than quiet days. Generally, occurrence of S_4 was enhanced during pre-midnight hours but was suppressed during post-midnight hour both at quiet and disturbed days in Lagos.
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