Location: 73 km N of Hatillo, Puerto Rico Period: 28 Nov 2011 04:56:22 - 28 Nov 2011 21:24:21 (16 hours 27 minutes) Volcanoes in 100km radius: None Earthquakes: 42 2 swarms found nearby. 2014 S20140113.2(4.4km) 13 Jan 7 days 8 hours 232 earthquakes S20140114.2(11.1km) 13 Jan 1 day 7 hours 40 earthquakes