Regional Jet 700 ER/LR (CRJ700)
Flight Crew Multiengine; Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument
Inflight Event / Encounter Wake Vortex Encounter
General None Reported / Taken
Procedure; Environment - Non Weather Related
Enroute at cruise altitude. We were in smooth air; VMC; and ATC had no reports of clear air turbulence. I believe we were at 290 knots and FL230. Captain had turned off seat belt sign and made required announcement to keep seat belt on when seated. With no traffic notification from ATC; or close traffic on TCAS; we received several seconds or less of wake turbulence. The right wing dipped slightly and it was what I would label as moderate turbulence. There was no indication from the cabin crew that there was any injury. We elected to stay at that flight level.
CRJ-700 First Officer reported encountering wake turbulence in cruise flight at FL230.