During the last few days, the green electrical box located across the alley behind our house has been humming very loudly. The volume the noise is at is such that if two people were standing beside it they would have difficulty holding a conversation. One night, the loud noise emanating from the green box persisted until 2:15 AM when it just stopped. It was like a switch was thrown. There was no noise coming from the box for the rest of the night/morning. However, the following day, the green box was again humming as loudly as it was a few hours before.
Is this a piece of the puzzle? If so, what does it mean? More questions needing answers.