Regional Jet 200 ER/LR (CRJ200)
Aircraft Equipment Problem Critical
Flight Crew Landed As Precaution; Flight Crew Returned To Departure Airport; General Maintenance Action; General Declared Emergency
Aircraft
We were on climbout and at approximately 4;000 feet. We experienced an oscillation in the #1 engine.  There were indications on the N1; ITT; and N2.  After this happened three times we declared an emergency.  We ran the QRH appropriate to the situation.  All three crew members performed their jobs in a professional manner.  We landed with no further incident.  I'm not sure why this even occurred.  Maintenance was in the process of trouble shooting when we left the aircraft.
CRJ200 First Officer reports engine surging climbing through 4;000 feet; which continues off and on until the crew elects to return and declares an emergency.