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Minor earthquake, 3.1 mag strikes near Luquillo in Puerto Rico



Earthquake location 18.9902S, -65.3874WA minor earthquake magnitude 3.1 (ml/mb) strikes 76 kilometers (47 miles) from Luquillo in Puerto Rico on Wednesday. The epicenter of the earthquake was roughly 29 km (18 miles) below the earth’s surface. Global date and time of event UTC/GMT: 21/10/15 / 2015-10-21 12:25:10 / October 21, 2015 @ 12:25 pm. Event id: pr15294003. Ids that are associated to the earthquake: pr15294003. Exact location of event, depth 29 km, -65.3874° West, 18.9902° North. The 3.1-magnitude earthquake has occurred at 08:25:10 / 8:25 am (local time epicenter).

Country/countries that might be effected, Puerto Rico (c. 3 917 000 pop). The epicenter was 79 km (49 miles) from Fajardo (c. 34 100 pop), 77 km (48 miles) from Luquillo (c. 8 300 pop), 77 km (48 miles) from Culebra (c. 1 500 pop). Closest city/cities/towns to epicentrum/hypocenter was Fajardo, Luquillo, Culebra (min 5000 pop).

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

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: 76 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 -65.3874° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 18.9902° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 29 km Depth of the event in kilometers.
Place 76km 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 2015-10-21 12:25:10 Time when the event occurred. UTC/GMT
Updated 2015-10-21 18:38:36 Time when the event was most recently updated. UTC/GMT
Timezone offset -240 Timezone offset from UTC in minutes at the event epicenter.
Felt 0 The total number of felt reports
CDI 1 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 12 The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance 0.68631288 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.38 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 241.2 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 pr15294003 Id of event.
Event Code 15294003 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,pr15294003, A comma-separated list of event ids that are associated to an event.

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