Why spark arises on electrical junction box
If your house wiring hasn't been inspected/repaired by a qualified electrician since the lightning damage occurred, then there is almost guaranteed to be damage to your wiring that can cause danger to yourself, your home, and your electronics.

If you are hearing crackling noises from your fusebox whenever you use an appliance, that could very well mean that the insulation on your wires was melted/scorched during the lightning surge, and is allowing electric to short-circuit spark between wires. THAT CAN START A HOUSE FIRE!

Please, for your own safety, have your house elerical system inspected &amp; tell the inspector about the lightning AND the noises from the fusebox. They can check to find where you have unsafe wires, so you can have them, or another electrician, fix the problems and make your home safe again.