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Minor earthquake: M3.17 quake has struck near Guánica in Puerto Rico


Earthquake location 17.8583S, -66.9201WA minor earthquake magnitude 3.17 (ml/mb) has occurred on Monday, 12 kilometers (7 miles) from Guánica in Puerto Rico. Global time and date of event 21/12/20 / 2020-12-21 22:36:12 / December 21, 2020 @ 10:36 pm UTC/GMT. Unique identifier: pr2020356009. Ids that are associated to the event: pr2020356009. Exact location of earthquake, longitude -66.9201 West, latitude 17.8583 North, depth = 13 km. The temblor was reported at 22:36:12 / 10:36 pm (local time epicenter). The earthquake occurred at a depth of 13 km (8 miles) below the earth’s surface.

Epicenter of the earthquake was 37 km (23 miles) from Ponce (c. 152 600 pop), 45 km (28 miles) from Mayagüez (c. 78 600 pop), 72 km (45 miles) from Arecibo (c. 49 300 pop), 77 km (48 miles) from Barceloneta (c. 22 300 pop), 21 km (13 miles) from Yauco (c. 20 300 pop). Country/countries that might be effected, Puerto Rico (c. 3 917 000 pop). Closest city/cities/towns to epicentrum/hypocenter was Manatí, Barceloneta, Aibonito (min 5000 pop).

Earthquakes 2.5 to 3.2 are often felt, but only causes minor damage. There are an estimated 130,000 minor earthquakes in the world each year. In the past 24 hours, there have been three, in the last 10 days twenty-one, in the past 30 days fourty-four and in the last 365 days two thousand, eight hundred and twenty-six earthquakes of magnitude 3.0 or greater that was reported nearby.

Did you feel the quake?

Did objects rattle, topple over, or fall off shelves? Leave a comment or report about activity, shaking and damage at your home, country and city. 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: 12 km S of Guánica, Puerto Rico.

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More information

Parameter Value Description
Magnitude 3.17 mb The magnitude for the event.
Longitude -66.9201° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 17.8583° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 13 km Depth of the event in kilometers.
Place 12 km S 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 22:36:12 Time when the event occurred. UTC/GMT
Updated 2020-12-21 23:48:30 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 155 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 9 The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance 0.1666 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 254 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 pr2020356009 Id of event.
Event Code 2020356009 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,pr2020356009, A comma-separated list of event ids that are associated to an event.

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