I have been searching online trying to find information about any unusual/unexpected seismic activity on the east coast of U.S. before the earthquake struck on August 23rd. So far, I've not been able to find any articles about that subject. Has anyone seen any information on that topic? Earthquakes in that area are very rare, and I believe the August 23rd earthquake set a record, for that area, with a magnitute of 5.9. Because I live in a mid-atlantic state, and I felt last week's earthquake fairly strongly, I'm curious to know if any unusual activity had been recorded either days or weeks, etc., before the earthquake. My thanks, in advance, to anyone who can enlighten me.