Very interesting, I will look at mine on Tuesday when we are do for more storms.
We have a very sensitive Earth Leakage trip which often trips when there is a storm about, so that means my wiring in my house is picking up from the lightning an induced 30Ma of current to trip it.
So if the storms very close it could be picking it up on your wiring.!
Not sure where its picking it up from - Im not electrically minded.
Some of the (boring) facts I noticed was that:-
~ One lightening flash always caused 1 errored second
- Most lightning flashes increased the CRC error down count by 1
- Close flashes racked up CRC error up by several at a time, whilst the more distant flashes didnt seem to affect CRC up.
But that could depend I suppose on what data/how much data was being transferred at that particular moment in time.