Flight Crew Air Transport Pilot (ATP)
Aircraft Equipment Problem Less Severe
Flight Crew Diverted; Flight Crew Landed As Precaution; General Maintenance Action
Aircraft
At cruise; we heard a bang from the back left of the airplane. We had normal indications on all instruments and synoptic pages; except for the electrical synoptic page. Gen 1 had erratic [voltage]; ranging from 3 to 14 and back very rapidly. All PFDs; MFDs; EICAS Display (ED); and the FMS began to flicker and go in and out. I was in favor of diverting initially. The Captain wanted to monitor and look into the situation before making a decision. The engine had a vibration and our displays continued to act up. We still had normal indications. Rather than continue; we came to an agreement to divert to [a nearby airport] and made an uneventful landing.After a maintenance run up we do not know why the issues occurred.
A CRJ-200 First Officer reported diverting to a nearby alternate after hearing a bang and noticing electrical anomalies.