Which preposition to use with blackout

in Occurrences 4%

Faith Baldwin Cuthrell (A); 18Dec69; R474939. Blackout in Eden, by Faith Baldwin.

at Occurrences 2%

SEE BENNETT, GEORGE K. GADDIS, MARGARET PAINE REA. Blackout at rehearsal, by M. P. Rea.

of Occurrences 1%

Needless to say, that there was a total blackout of all mining-related stories which showed the industry in poor light.

Which preposition to use with  blackout