Minor earthquake, 3.21 mag has occurred near Arecibo in Puerto Rico

A minor earthquake magnitude 3.21 (ml/mb) strikes 88 km N of Arecibo, Puerto Rico (55 miles) on Monday. The epicenter of the earthquake was roughly 49.85 km (31 miles) below the earth’s surface. Date and time of earthquake in UTC/GMT: 01/12/25 / 2025-12-01 04:23:33 / December 1, 2025 @ 4:23 am. The 3.21-magnitude earthquake was detected at 04:23:33 / 4:23 am (local time epicenter). Exact location of earthquake, longitude -66.622166666667 West, latitude 19.267 North, depth = 49.85 km. Event ids that are associated to the earthquake: pr71501103. Id of event: pr71501103.

Earthquakes 3.0 to 4.0 are often felt, but only causes minor damage. Each 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 six, in the past 30 days seventeen and in the last 365 days three hundred and thirty earthquakes of magnitude 3.0 or greater that was reported nearby.

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How did you react? Was there any damage to buildings? Leave a comment or report about shaking, activity and damage at your home, city 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: 88 km N of Arecibo, Puerto Rico.

Arecibo Puerto Rico

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Parameter	Value	Description
Magnitude	3.21 mb	The magnitude for the event.
Longitude	-66.622166666667° West	Decimal degrees longitude. Negative values for western longitudes.
Latitude	19.267° North	Decimal degrees latitude. Negative values for southern latitudes.
Depth	49.85 km	Depth of the event in kilometers.
Place	88 km N of Arecibo, 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	2025-12-01 04:23:33	Time when the event occurred. UTC/GMT
Updated	2025-12-01 04:39:13	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	159	A number describing how significant the event is. Larger numbers indicate a more significant event.
Network	pr	The ID of a data contributor. Identifies the network considered to be the preferred source of information for this event.
Sources	,pr,	A comma-separated list of network contributors.
Number of Stations Used	16	The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance	0.7906	Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square	0.36 sec	The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap	268	The largest azimuthal gap between azimuthally adjacent stations (in degrees).
Magnitude Type	md	The method or algorithm used to calculate the preferred magnitude for the event.
Event Type	earthquake	Type of seismic event.
Event ID	pr71501103	Id of event.
Event Code	71501103	An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS	,pr71501103,	A comma-separated list of event ids that are associated to an event.

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Minor earthquake, 3.21 mag has occurred near Arecibo in Puerto Rico

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