since posting this, another mag5/10km happened. This time 30 miles away, it is the first of this nearby region.
https://earthquake.usgs.gov/earthquakes/map/?extent=-62.69431,-58.29346&extent=-61.22267,-53.02002&range=search&listOnlyShown=true&timeZone=utc&search=%7B%22name%22:%22Search%20Results%22,%22params%22:%7B%22starttime%22:%222021-01-23%2000:00:00%22,%22endtime%22:%222021-01-30%2023:59:59%22,%22minmagnitude%22:4.8,%22maxmagnitude%22:5.2,%22mindepth%22:9,%22maxdepth%22:11,%22orderby%22:%22time%22%7D%7D