Seismic Swarm in Southwestern Coast of Puerto Rico

April 1, 2003

The Puerto Rico Seismic Network (PRSN) registered a seismic swarm of a total of 40 earthquakes, between March 22 and 26, 2003. This swarm was generated in the Southwestern Region of Puerto Rico, from the western coast of Cabo Rojo to the coast of Lajas. Of these 40 earthquakes, the PRSN located a total of 26; the other 14 quakes were not recorded by enough stations to be located. The magnitude of the seismic events ranged from 1.6 to 4.1 and their depths from 0.8 to 17.9 km. Eight of the earthquakes in the swarm were felt in the western side of Puerto Rico. No damage has been reported associated with any of the seismic events of this seismic swarm. Below is a list of the felt earthquakes:

Date	Local Time	Latitude N	Longitude W	Depth Km	Magnitude	Maximum Intensity (MMS)		Location
22/03/2003	14:25:42	17.988	67.218	1.6	4.1	V	Cabo Rojo	West Coast of Cabo Rojo
22/03/2003	15:21:01	17.984	67.202	4.9	3.3	III	Cabo Rojo	West Coast of Cabo Rojo
22/03/2003	15:44:49	18.036	67.190	3.9	3.4	III	Combate Cabo Rojo	West Coast of Cabo Rojo
22/03/2003	16:07:22	17.950	66.995	4.6	2.2	II	El Corozo Cabo Rojo	South Coast of Lajas
22/03/2003	16:20:53	18.029	67.168	5.2	3.3	III	Cabo Rojo	West Coast of Cabo Rojo
22/03/2003	16:35:21	17.999	67.215	4.5	2.9	III	Combate Cabo Rojo	West Coast of Cabo Rojo
22/03/2003	19:56:33	17.961	67.178	9.9	2.6	III	Mayagüez	West Coast of Cabo Rojo
23/03/2003	19:16:33	18.005	67.155	0.8	3.5	III	Combate Cabo Rojo	West Coast of Cabo Rojo

Epicentral Map for the earthquakes in Southwestern Coast of Puerto Rico from March 22, 2003 to March 26, 2003:

Waveforms for the earthquake of March 22, 2003 at 14:25:42

Broadband Stations
(click on the image to enlarge)

Shortperiod Stations
(click on the image to enlarge)

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