Wow, that's a lotta work for 1" worth of problem. :shock:
Mine in my 90G pops almost nada during the day, and about once every 5 min or so during the night. Some times he goes off and it's once every few seconds for 5-10 minutes! I have no idea what he is doing, but I actually like the noise. It let's me know he's alive and kickin' Of course, my tank is in the entryway to the house, not my bedroom!
He also has built himself a nice little sand castle with sand almost 3" higher than my normal bed height. No telling how many tunnels he has in there!