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Earthquake breaking news, Minor World Earthquakes Magnitude -3.9

Minor earthquake, 3.45 mag has occurred near Guánica in Puerto Rico


Earthquake location 17.9471S, -66.938WA minor earthquake with magnitude 3.45 (ml/mb) was reported 4 kilometers (2 miles) from Guánica in Puerto Rico on Monday. Exact location of event, depth 11 km, -66.938° West, 17.9471° North. Event ids that are associated to the earthquake: pr2020356003. Id of event: pr2020356003. The 3.45-magnitude earthquake has occurred at 06:26:05 / 6:26 am (local time epicenter). The epicenter was at a depth of 11 km (7 miles). Global date and time of event UTC/GMT: 21/12/20 / 2020-12-21 06:26:05 / December 21, 2020 @ 6:26 am.

Earthquake epicenter was 35 km (22 miles) from Ponce (c. 152 600 pop), 35 km (22 miles) from Mayagüez (c. 78 600 pop), 63 km (39 miles) from Arecibo (c. 49 300 pop), 80 km (50 miles) from Vega Baja (c. 29 300 pop), 70 km (44 miles) from Barceloneta (c. 22 300 pop). Nearest cities/city/villages to epicentrum/hypocenter was Cayey, Ceiba, Naranjito (min 5000 pop). Country/countries that might be effected, Puerto Rico (c. 3 917 000 pop).

In the past 24 hours, there have been one, in the last 10 days twenty, in the past 30 days fourty-seven and in the last 365 days two thousand, eight hundred and thirty-six 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. Each year there are an estimated 130,000 minor earthquakes in the world.

Questions or comments?

What was your situation during the earthquake? Leave a comment or report about damage, shaking and activity at your home, city and country. The information in this article comes from the USGS Earthquake Notification Service. Read more about the earthquake, Seismometer information, Distances, Parameters, Date-Time, Location and details about this quake, detected near: 4 km SW of Guánica, Puerto Rico.

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More information

Parameter Value Description
Magnitude 3.45 mb The magnitude for the event.
Longitude -66.938° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 17.9471° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 11 km Depth of the event in kilometers.
Place 4 km SW of Guánica, 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 2020-12-21 06:26:05 Time when the event occurred. UTC/GMT
Updated 2020-12-21 06:54:39 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 183 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 18 The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance 0.1085 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.1 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 200 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 pr2020356003 Id of event.
Event Code 2020356003 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,pr2020356003, A comma-separated list of event ids that are associated to an event.

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