[Finally] One day after I cleared some ice off the area in front of the garage, I checked to see what my RSB recorded. The spikes were interesting and were likely from my ice chipping to loosen ice to scrape off.
A few days later I went outside to the far end of the pavement and tapped my shovel there once. Then moved a third of the way back and tapped twice. Then repeated two more times.
This is one final example that:
1) It's easy to make the Earth move.
2) These Shakes are not toys, but amazingly sensitive instruments.