The answer to 'electrical panel sparking' is that a sparking electrical panel is a serious issue that requires immediate attention. Sparking can be caused by loose connections, overloaded circuits, water damage, or a faulty circuit breaker. Symptoms may include flickering lights, burning odors, or circuit breakers tripping frequently.
Sparking is a fire hazard and should not be ignored. If you notice any sparking, shut off the main breaker immediately and do not attempt to make repairs yourself. Call a licensed electrician right away to diagnose and fix the problem. Trying to repair a sparking panel without proper training and equipment can be extremely dangerous.