Location: 55 km N of San Antonio, Puerto Rico Period: 23 Sep 2019 10:15:29 - 10 Oct 2019 03:42:20 (16 days 17 hours 26 minutes) Volcanoes in 100km radius: None Earthquakes: 363 1 swarms found nearby. 2019 S20191217.1(6.9km) 16 Dec 1 day 17 hours 27 earthquakes