Here's the magnitude 5.4 earthquake near Midland Texas last Friday as seen on seismographs in the area. A red trace in our web-based data viewer means >0.2mm/s peak amplitude, something we don't see on multiple stations very often, let alone on almost all of them! That said, there are a lot of stations very close to the epicentre due to saltwater injection monitoring requirements.
@seislologist That's neat. What was the peak ground velocity?
@seislologist Wow, that's high, almost chimney-breaking level. Good thing they are extension.