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Minor earthquake 3.1 mag, 78 km NNE of Luquillo, Puerto Rico


Earthquake location 19.02S, -65.4108WA minor earthquake with magnitude 3.1 (ml/mb) was reported 78 kilometers (48 miles) from Luquillo in Puerto Rico on Thursday. The 3.1-magnitude earthquake was detected at 04:34:56 / 4:34 am (local time epicenter). The epicenter of the earthquake was roughly 29 km (18 miles) below the earth’s surface. Exact location of event, depth 29 km, -65.4108° West, 19.02° North. Unique identifier: pr2020352001. Ids that are associated to the event: pr2020352001. Date and time of earthquake in UTC/GMT: 17/12/20 / 2020-12-17 04:34:56 / December 17, 2020 @ 4:34 am.

Close country/countries, Puerto Rico (c. 3 917 000 pop) (That might be effected). The epicenter was 79 km (49 miles) from Luquillo (c. 8 300 pop). Closest city/cities/towns to epicentrum/hypocenter was Luquillo (min 5000 pop).

Every year there are an estimated 130,000 minor earthquakes in the world. In the past 24 hours, there have been three, in the last 10 days twelve, in the past 30 days thirty-nine and in the last 365 days one hundred and ninety-five earthquakes of magnitude 3.0 or greater that have been detected in the same area. Earthquakes 2.5 to 3.2 are often felt, but only causes minor damage.

How would you describe the shaking?

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. Read more about the earthquake, Location, Distances, Seismometer information, Date-Time, Parameters and details about this quake, reported near: 78 km NNE of Luquillo, Puerto Rico. This information comes from the USGS Earthquake Notification Service.

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More information

Parameter Value Description
Magnitude 3.1 mb The magnitude for the event.
Longitude -65.4108° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 19.02° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 29 km Depth of the event in kilometers.
Place 78 km NNE of Luquillo, 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 2020-12-17 04:34:56 Time when the event occurred. UTC/GMT
Updated 2020-12-17 05:14:58 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 148 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 13 The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance 0.9811 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.25 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 323 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 pr2020352001 Id of event.
Event Code 2020352001 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,pr2020352001, A comma-separated list of event ids that are associated to an event.

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