This is extremely rare.
(Yeah - we only see what they want us to)
I'm in an area that had an explosion of jet noise for the past three months - nothing like it in 20 years. This quiet is a little spoopy.
The small print on the map says leaflet drop. Didn't bother to look for anything more recent, but apparently 6 months ago, Leaflets were dropped by Mattis.
https://liveuamap.com/en/2017/19-october-leaflets-with-james-mattis-were-dropped-over-donetsk
Anti-terrorist action. Hover over icons on live map for more info.
https://liveuamap.com/en/2018/30-april-ukraine–today-april-30-antiterrorist-operation