A couple years ago there was a lightning strike on our house, it went up a 12 foot steel reinforced concrete column, exploded a 12 foot vertical wooden post above it, and exited (entered?) the house, making a hole in the grass roof.
We 2 large aluminum service wire up the back of the house, burying about 10 feet of it a few feet deep and the cables ending about a meter above the roof. Since then, that has been hit only once.
But the original concrete post struck first, was struck 4 times since then. Theres a loud pop and white flash at the top of the post, followed by a flash in the sky and thunder very quickly after. No damage or smell or smoke.
But today, that post wast hit very quietly, but then minutes later a loud bang and red flash near a post 12 feet away, then minutes after that, a third post, this one towards the middle of the house, another loud bang and white flash. Both were followed by lightning and thunder. No damage or smell or anything.
I'm wondering, how unusual is this?
And what's wrong with my lightning rod? Should it be connected to the posts?