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Minor earthquake, 3.15 mag strikes near Indios in Puerto Rico


Earthquake location 17.9453S, -66.8436WA minor earthquake with magnitude 3.15 (ml/mb) was detected on Thursday, 5 kilometers (3 miles) from Indios in Puerto Rico. Unique identifier: pr2020359108. Ids that are associated to the event: us6000d2ph, pr2020359108. Exact time and date of event in UTC/GMT: 24/12/20 / 2020-12-24 20:40:20 / December 24, 2020 @ 8:40 pm. Exact location of event, longitude -66.8436 West, latitude 17.9453 North, depth = 12 km. The epicenter of the earthquake was roughly 12 km (7 miles) below the earth’s surface. The temblor was picked up at 20:40:20 / 8:40 pm (local time epicenter).

Nearby country/countries that might be effected, Puerto Rico (c. 3 917 000 pop). Event epicenter was 25 km (16 miles) from Ponce (c. 152 600 pop), 42 km (26 miles) from Mayagüez (c. 78 600 pop), 60 km (37 miles) from Arecibo (c. 49 300 pop), 73 km (46 miles) from Vega Baja (c. 29 300 pop), 65 km (40 miles) from Barceloneta (c. 22 300 pop). Nearest cities/city/towns to hypocenter/epicentrum was San Antonio, Toa Alta, Guayama (min 5000 pop).

In the past 24 hours, there have been thirty-nine, in the last 10 days fifty-eight, in the past 30 days eighty-five and in the last 365 days two thousand, eight hundred and seventy-four earthquakes of magnitude 3.0 or greater that has occurred nearby. Earthquakes 2.5 to 3.2 are often felt, but only causes minor damage. Each year there are an estimated 130,000 minor quakes in the world.

Questions or comments?

Were you asleep? Was it difficult to stand and/or walk? Leave a comment or report about shaking, activity and damage at your city, home and country. This information comes from the USGS Earthquake Notification Service. Read more about the earthquake, Seismometer information, Date-Time, Location, Distances, Parameters and details about this quake, recorded: 5 km SSW of Indios, Puerto Rico.

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More information

Parameter Value Description
Magnitude 3.15 mb The magnitude for the event.
Longitude -66.8436° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 17.9453° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 12 km Depth of the event in kilometers.
Place 5 km SSW of Indios, 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 2020-12-24 20:40:20 Time when the event occurred. UTC/GMT
Updated 2020-12-25 20:49:30 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 153 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 ,us,pr, A comma-separated list of network contributors.
Number of Stations Used 23 The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance 0.0464 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.22 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 190 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 pr2020359108 Id of event.
Event Code 2020359108 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us6000d2ph,pr2020359108, A comma-separated list of event ids that are associated to an event.

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