On the left side of the pan, there is a signal that begins at a single point and then fans out much wider. I have never seen this before and wonder what it might be. This was this morning during my local Indiana greyline time while trying to listen for W1AW/KH6.
At my station, there is a front loader pair, washer and dryer. When the washer is cycling, it sometimes produces a similar "leaf rake" type of pattern, generated by variabe speed controllers/motors. Look for that possibility in these, and other sources including newer furnaces etc. And if you are close ebough to another residence, may even get a little from them.