Been in the same house 5 years and have never seen this. There's tons (ok, a hundred) wasps sorta hovering over my lawns (front and back). There's no apparent hole or hive they're concentrating around. When I mowed, some popped up out from under the grass, but again, all over (not concentrated as in a hive).

I put up one of those wasp tube traps yesterday, but so far, I've caught only one.

Any suggestions?