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Minor earthquake, 3.6 mag strikes near Brenas in Puerto Rico

Posted by admin on December 22, 2025 0 Comments

Earthquake location 18.6315S, -66.3328WA minor earthquake magnitude 3.6 (ml/mb) has struck on Monday, 18 kilometers (11 miles) from Brenas in Puerto Rico. The earthquake was roughly at a depth of 79.634 km (49 miles). Exact location of event, longitude -66.3328 West, latitude 18.6315 North, depth = 79.634 km. Unique identifier: us7000rk6n. Ids that are associated to the event: us7000rk6n. Exact time and date of event in UTC/GMT: 22/12/25 / 2025-12-22 19:56:49 / December 22, 2025 @ 7:56 pm. The temblor was reported at 19:56:49 / 7:56 pm (local time epicenter).

Closest city/cities or villages, with min 5000 pop, to hypocenter/epicentrum was Maricao, Guayanilla, Maunabo. Close country/countries, Puerto Rico (c. 3 917 000 pop) (That might be effected). Epicenter of the event was 30 km (19 miles) from San Juan (c. 418 100 pop), 32 km (20 miles) from Bayamón (c. 203 500 pop), 48 km (30 miles) from Carolina (c. 170 400 pop), 75 km (47 miles) from Ponce (c. 152 600 pop), 53 km (33 miles) from Caguas (c. 86 800 pop), 38 km (24 miles) from Guaynabo (c. 81 400 pop).

Every year there are an estimated 130,000 minor earthquakes in the world. In the past 24 hours, there have been one, in the last 10 days eight, in the past 30 days thirty-five and in the last 365 days three hundred and ninety-nine earthquakes of magnitude 3.0 or greater that was reported nearby. Earthquakes 3.0 to 4.0 are often felt, but only causes minor damage.

Did you feel it?

Were you asleep? Was it difficult to stand and/or walk? Leave a comment or report about shaking, activity and damage at your city, home and country. This information comes from the USGS Earthquake Notification Service. Read more about the earthquake, Seismometer information, Date-Time, Location, Distances, Parameters and details about this quake, recorded: 18 km N of Brenas, Puerto Rico.

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More information

Parameter Value Description
Magnitude 3.6 mb The magnitude for the event.
Longitude -66.3328° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 18.6315° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 79.634 km Depth of the event in kilometers.
Place 18 km N of Brenas, Puerto Rico Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2025-12-22 19:56:49 Time when the event occurred. UTC/GMT
Updated 2025-12-22 20:01:07 Time when the event was most recently updated. UTC/GMT
Timezone offset Timezone offset from UTC in minutes at the event epicenter.
Felt The total number of felt reports
CDI The maximum reported intensity for the event.
MMI The maximum estimated instrumental intensity for the event.
Alert Level The alert level from the PAGER earthquake impact scale. Green, Yellow, Orange or Red.
Review Status reviewed Indicates whether the event has been reviewed by a human.
Tsunami 0 This flag is set to "1" for large events in oceanic regions and "0" otherwise. The existence or value of this flag does not indicate if a tsunami actually did or will exist.
SIG 199 A number describing how significant the event is. Larger numbers indicate a more significant event.
Network us The ID of a data contributor. Identifies the network considered to be the preferred source of information for this event.
Sources ,us, A comma-separated list of network contributors.
Number of Stations Used 19 The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance 0.242 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.31 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 153 The largest azimuthal gap between azimuthally adjacent stations (in degrees).
Magnitude Type ml The method or algorithm used to calculate the preferred magnitude for the event.
Event Type earthquake Type of seismic event.
Event ID us7000rk6n Id of event.
Event Code 7000rk6n An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us7000rk6n, A comma-separated list of event ids that are associated to an event.

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