Well, the sounds/noises are worse than I've EVER heard them to date. Starting from about 11pm tonight, and lasting in approximately 15 minute intervals, it has begun, once again. I hadn't heard anything for the most part of the winter. This time, I thought it was helicopters again. Nope, not a chance. I went outside to see, came back in and grabbed the recorder. The playback, as usual, doesn't do it justice, but at least this time it can be heard without amplification. We're going to amplify it before putting it up and show both the amplified and original recordings. It sounded at one point as if half the city was falling into some sort of cave-in.
It's now just after 12:30am, and I'm only writing this NOW because it's been going on again for the last 5 minutes or so. Oh, and there, it JUST stopped. Relief, I must say.
Anyhow, that's where we're at with this.