that all of the thousands of tiny earthquakes occurring every day probably nucleate in a way indistinguishable from the way large earthquakes nucleate. So are you suggesting you're hearing many of these thousands a day?

Just to be straightforward, the electrical discharge from a square meter of rock grinding 1 micron in 6 hours is so small one couldn't measure it from 3 ft away, let alone hear it from its conversion to sound waves through 10 miles of rock.