Minor earthquake, 3.6 mag strikes near San Antonio in Puerto Rico

A minor earthquake magnitude 3.6 (ml/mb) has struck on Monday, 121 km N of San Antonio, Puerto Rico (75 miles). The earthquake was roughly at a depth of 18 km (11 miles). Exact time and date of earthquake 28/07/25 / 2025-07-28 04:58:46 / July 28, 2025 @ 4:58 am UTC/GMT. The 3.6-magnitude earthquake was detected at 04:58:46 / 4:58 am (local time epicenter). Id of earthquake: pr2025209000. Event ids that are associated: pr2025209000. Exact location of earthquake, -67.2511° West, 19.5808° North, depth 18 km.

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 five, in the past 30 days twenty-six and in the last 365 days three hundred and fifty-four earthquakes of magnitude 3.0 or greater that has occurred nearby. Earthquakes 3.0 to 4.0 are often felt, but only causes minor damage.

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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. Read more about the earthquake, Distances, Seismometer information, Date-Time, Parameters, Location and details about this quake, that has struck: 121 km N of San Antonio, Puerto Rico. This data comes from the USGS Earthquake Notification Service.

Puerto Rico San Antonio

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Parameter	Value	Description
Magnitude	3.6 mb	The magnitude for the event.
Longitude	-67.2511° West	Decimal degrees longitude. Negative values for western longitudes.
Latitude	19.5808° North	Decimal degrees latitude. Negative values for southern latitudes.
Depth	18 km	Depth of the event in kilometers.
Place	121 km N of San Antonio, 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	2025-07-28 04:58:46	Time when the event occurred. UTC/GMT
Updated	2025-07-28 05:58:11	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	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	20	The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance	1.122	Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square	0.37 sec	The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap	248	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	pr2025209000	Id of event.
Event Code	2025209000	An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS	,pr2025209000,	A comma-separated list of event ids that are associated to an event.

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Minor earthquake, 3.6 mag strikes near San Antonio in Puerto Rico

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