Location: 78 km N of Brenas, Puerto Rico Period: 12 Mar 2009 00:24:31 - 12 Mar 2009 16:42:30 (16 hours 17 minutes) Volcanoes in 100km radius: None Earthquakes: 46 5 swarms found nearby. 2006 S20060817.1(5.1km) 17 Aug 1 day 12 hours 34 earthquakes 2009 S20090215.1(8.4km) 15 Feb 1 day 21 hours 47 earthquakes 2010 S20100317.1(11.6km) 16 Mar 1 day 10 hours 39 earthquakes S20101103.1(10.6km) 2 Nov 1 day 17 hours 35 earthquakes 2014 S20140506.1(9.8km) 6 May 1 day 9 hours 48 earthquakes