Position: 39.99°N 75.61.170°W – Depth: 4 km
This was a very small tremor that occurred very near our location. It could have been either an earthquake or a quarry blast (there is a quarry a few kilometers from here). While the quake was not felt here, I have at least one report of shaking in the area. The USGS did not report anything on their site however.
SeisComP3 traces for AM.R8C73.00.SHZ (Exton PA), LD.WUPA.BHZ (West Chester University, West Chester PA), and PE.PSUB.HHZ (Peen State, Media) of the quake. These are all filtered with a 1Hz highpass Butterworth filter.