Pokemon Go A Grim Omen? Boosted Shiny Absol

Trainers, a five-minute Absol event will likely happen each day, and you can encounter Absol and shiny Absol.

A Grim Omen? is a short event in Pokemon Go that lasts only 5 minutes. The event starts at 12 PM local time. During this period Pokemon Go players will be seeing more Absol in the wild. Also, the Shiny Absol rate is increased to 1/64.

There is no official announcement, but you might want to check your Research tab and search for A Grim Omen? event.