It is written in a 6/8 beat in 30 measures (plus upbeat) and should be expressed Lugubre (dire).
This is one of several pieces Scriabin never played in public (together with the Sonata No.
He called it "Shattered Strings" (German "Zersprungene Saiten") when Leonid Sabaneyev reminded him of the piece during a discussion about minor and major.
This Prelude, and also the Marche funebre in the First Sonata formed in moments disheartenment...
(referring to his allegation that he had abandoned the minor tonality a long time ago).