Earthquake · Reviewed by USGS

M3.1 earthquake 75 km N of Brenas, Puerto Rico

A magnitude 3.1 earthquake struck 75 km N of Brenas, Puerto Rico at Sep 20, 2026, 02:31 UTC, at a depth of 11 km. The epicentre was 78 km (48 mi) NNW of San Juan.

Details

Magnitude	3.1 md
Time	Sep 20, 2026, 02:31 UTC
Depth	10.5 km
Coordinates	19.149, -66.272
Felt reports	0
Tsunami flag	None
Source	USGS event page

Fig. 1The epicentre and other earthquakes within 100 km, since the day before

01 — Nearby

Nearest cities

02 — Around it

Other earthquakes within 100 km

Other earthquakes within 100 km since the day before this event
Magnitude	Location	Distance	Depth	Time
3.0	66 km N of San Juan, Puerto Rico	22 km / 14 mi	depth 31 km	Oct 26, 03:41 UTC
3.3	53 km N of Brenas, Puerto Rico	23 km / 14 mi	depth 26 km	Oct 21, 05:01 UTC
3.6	93 km N of Brenas, Puerto Rico	17 km / 11 mi	depth 69 km	Oct 21, 00:55 UTC
3.1	22 km NNE of Brenas, Puerto Rico	54 km / 34 mi	depth 74 km	Oct 14, 23:24 UTC
3.1	48 km N of Hatillo, Puerto Rico	62 km / 38 mi	depth 36 km	Oct 14, 18:02 UTC
2.9	10 km N of Animas, Puerto Rico	77 km / 48 mi	depth 13 km	Oct 13, 06:05 UTC
3.1	68 km N of Tierras Nuevas Poniente, Puerto Rico	22 km / 14 mi	depth 35 km	Oct 8, 07:26 UTC
3.4	81 km NNE of Luquillo, Puerto Rico	91 km / 56 mi	depth 40 km	Oct 7, 14:08 UTC
3.1	7 km NNW of Trujillo Alto, Puerto Rico	86 km / 53 mi	depth 113 km	Oct 6, 15:42 UTC
2.5	17 km NNE of Isabela, Puerto Rico	90 km / 56 mi	depth 21 km	Oct 5, 06:02 UTC
3.0	34 km NNE of San Juan, Puerto Rico	49 km / 30 mi	depth 43 km	Oct 5, 03:07 UTC
3.4	2 km NW of Corozal, Puerto Rico	88 km / 55 mi	depth 111 km	Oct 3, 05:38 UTC
2.8	16 km NNE of Arecibo, Puerto Rico	73 km / 45 mi	depth 14 km	Oct 1, 08:45 UTC
3.1	4 km NNE of Animas, Puerto Rico	83 km / 51 mi	depth 105 km	Sep 30, 21:00 UTC
2.6	4 km NNE of Aguas Buenas, Puerto Rico	97 km / 60 mi	depth 66 km	Sep 29, 04:14 UTC
2.9	41 km NNE of Luquillo, Puerto Rico	84 km / 52 mi	depth 24 km	Sep 28, 10:13 UTC
2.6	3 km SE of Galateo, Puerto Rico	89 km / 55 mi	depth 67 km	Sep 28, 03:55 UTC
2.8	8 km NNE of Tierras Nuevas Poniente, Puerto Rico	71 km / 44 mi	depth 89 km	Sep 26, 05:35 UTC
2.8	13 km NNE of Carrizales, Puerto Rico	80 km / 50 mi	depth 17 km	Sep 22, 07:30 UTC
3.3	103 km NNE of Vieques, Puerto Rico	94 km / 59 mi	depth 76 km	Sep 21, 07:53 UTC
3.3	110 km N of Suárez, Puerto Rico	57 km / 36 mi	depth 21 km	Sep 19, 22:15 UTC
2.5	11 km N of Quebradillas, Puerto Rico	94 km / 59 mi	depth 17 km	Sep 19, 17:18 UTC
3.4	142 km N of Hatillo, Puerto Rico	86 km / 53 mi	depth 33 km	Sep 19, 07:54 UTC

USGS can revise magnitude and location after the first report. See magnitude vs intensity and aftershocks.