A magnitude 4.1 aftershock last night at 7:48 p.m. local time, is the biggest since the main 5.2 Duncan earthquake struck on June 28. [Right, southern-most orange circle is the M 4.1 event. Credit, USGS]
There was another M 3.0 aftershock at 12:53 a.m. this morning. That makes 7 events in a day and half of about magnitude 3 or larger, most of which were felt by local residents and some at least 30 miles away.