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Light earthquake: M4.2 quake has struck near Carrizales in Puerto Rico


Earthquake location 18.9942S, -66.6821WA light earthquake magnitude 4.2 (ml/mb) has struck on Monday, 57 kilometers (35 miles) from Carrizales in Puerto Rico. The temblor was reported at 05:56:18 / 5:56 am (local time epicenter). The earthquake was roughly at a depth of 50.552 km (31 miles). A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Event id: us7000q9p2. Ids that are associated to the earthquake: us7000q9p2. Exact location of event, longitude -66.6821 West, latitude 18.9942 North, depth = 50.552 km. Global date and time of event UTC/GMT: 30/06/25 / 2025-06-30 05:56:18 / June 30, 2025 @ 5:56 am.

Nearest cities/city/towns to hypocenter/epicentrum was Guaynabo, Añasco, Adjuntas (min 5000 pop). Earthquake epicenter was 84 km (52 miles) from San Juan (c. 418 100 pop), 86 km (54 miles) from Bayamón (c. 203 500 pop), 93 km (58 miles) from Guaynabo (c. 81 400 pop), 58 km (36 miles) from Arecibo (c. 49 300 pop), 80 km (50 miles) from Levittown (c. 29 800 pop), 69 km (43 miles) from Vega Baja (c. 29 300 pop). Close country/countries that might be effected, Puerto Rico (c. 3 917 000 pop).

In the past 24 hours, there have been three, in the last 10 days twenty-nine, in the past 30 days fourty-seven and in the last 365 days four hundred and nineteen earthquakes of magnitude 3.0 or greater that have been detected in the same area. Earthquakes 4.0 to 5.0 are often felt, but only causes minor damage. There are an estimated 13,000 light quakes in the world each year.

Questions or comments?

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: 57 km NNE of Carrizales, Puerto Rico.

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More information

Parameter Value Description
Magnitude 4.2 mb The magnitude for the event.
Longitude -66.6821° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 18.9942° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 50.552 km Depth of the event in kilometers.
Place 57 km NNE of Carrizales, 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 2025-06-30 05:56:18 Time when the event occurred. UTC/GMT
Updated 2025-06-30 06:13:11 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 271 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 33 The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance 0.534 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 1.22 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 106 The largest azimuthal gap between azimuthally adjacent stations (in degrees).
Magnitude Type mb The method or algorithm used to calculate the preferred magnitude for the event.
Event Type earthquake Type of seismic event.
Event ID us7000q9p2 Id of event.
Event Code 7000q9p2 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us7000q9p2, A comma-separated list of event ids that are associated to an event.

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