Minor earthquake: M3.22 quake has struck near Ponce in Puerto Rico

A minor earthquake magnitude 3.22 (ml/mb) has struck on Thursday, 4 kilometers (2 miles) from Ponce in Puerto Rico. The 3.22-magnitude earthquake has occurred at 03:56:07 / 3:56 am (local time epicenter). The epicenter was at a depth of 18.78 km (12 miles). Id of earthquake: pr71491198. Event ids that are associated: pr71491198. Exact location of earthquake, longitude -66.6125 West, latitude 18.051 North, depth = 18.78 km. Global date and time of event UTC/GMT: 31/07/25 / 2025-07-31 03:56:07 / July 31, 2025 @ 3:56 am.

Nearest cities/city/towns to hypocenter/epicentrum was Las Piedras, Carolina, Yabucoa (min 5000 pop). Nearby country/countries that might be effected, Puerto Rico (c. 3 917 000 pop). Event epicenter was 71 km (44 miles) from San Juan (c. 418 100 pop), 62 km (38 miles) from Bayamón (c. 203 500 pop), 78 km (49 miles) from Carolina (c. 170 400 pop), 4 km (3 miles) from Ponce (c. 152 600 pop), 63 km (39 miles) from Caguas (c. 86 800 pop).

Earthquakes 3.0 to 4.0 are often felt, but only causes minor damage. In the past 24 hours, there have been one, in the last 10 days six, in the past 30 days thirteen and in the last 365 days three hundred and fifteen earthquakes of magnitude 3.0 or greater that has struck near. There are an estimated 130,000 minor quakes in the world each year.

Did you feel it?

How did you respond? Did any furniture slide, topple over, or become displaced? Leave a comment or report about activity, shaking and damage at your home, city and country. This data comes from the USGS Earthquake Notification Service. Read more about the earthquake, Seismometer information, Distances, Parameters, Date-Time, Location and details about this quake, that has occurred near: 4 km NNE of Ponce, Puerto Rico.

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Parameter	Value	Description
Magnitude	3.22 mb	The magnitude for the event.
Longitude	-66.6125° West	Decimal degrees longitude. Negative values for western longitudes.
Latitude	18.051° North	Decimal degrees latitude. Negative values for southern latitudes.
Depth	18.78 km	Depth of the event in kilometers.
Place	4 km NNE of Ponce, 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	2025-07-31 03:56:07	Time when the event occurred. UTC/GMT
Updated	2025-07-31 04:13:57	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	160	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	28	The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance	0.0101	Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square	0.19 sec	The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap	79	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	pr71491198	Id of event.
Event Code	71491198	An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS	,pr71491198,	A comma-separated list of event ids that are associated to an event.

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Minor earthquake: M3.22 quake has struck near Ponce in Puerto Rico

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