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Minor earthquake: M3.1 quake has struck near Puerto Real in Puerto Rico


Earthquake location 18.0951S, -67.646WA minor earthquake magnitude 3.1 (ml/mb) has occurred on Saturday, 48 kilometers (30 miles) from Puerto Real in Puerto Rico. The epicenter was at a depth of 30.57 km (19 miles). Global date and time of event UTC/GMT: 08/12/18 / 2018-12-08 21:57:01 / December 8, 2018 @ 9:57 pm. The temblor was picked up at 16:57:01 / 4:57 pm (local time epicenter). Event ids that are associated to the earthquake: us1000i56k. Id of event: us1000i56k. Exact location of earthquake, -67.646° West, 18.0951° North, depth 30.57 km.

Nearby country/countries that might be effected, Puerto Rico (c. 3 917 000 pop). The epicenter was 55 km (34 miles) from Mayagüez (c. 78 600 pop), 64 km (40 miles) from Aguadilla (c. 16 100 pop), 80 km (49 miles) from Isabela (c. 12 500 pop), 64 km (39 miles) from San Germán (c. 12 100 pop), 55 km (34 miles) from Hormigueros (c. 11 900 pop). Nearest cities/city/towns to hypocenter/epicentrum was Isabela, Guánica, San Sebastián (min 5000 pop).

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

Did you feel the quake?

How did you respond? Did any furniture slide, topple over, or become displaced? Leave a comment or report about activity, shaking and damage at your home, city and country. Read more about the earthquake, Distances, Seismometer information, Date-Time, Parameters, Location and details about this quake, that has struck: 48 km W of Puerto Real, Puerto Rico. This data 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 -67.646° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 18.0951° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 30.57 km Depth of the event in kilometers.
Place 48km W of Puerto Real, 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 2018-12-08 21:57:01 Time when the event occurred. UTC/GMT
Updated 2018-12-08 22:06:39 Time when the event was most recently updated. UTC/GMT
Timezone offset -300 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 us The ID of a data contributor. Identifies the network considered to be the preferred source of information for this event.
Sources ,us, A comma-separated list of network contributors.
Number of Stations Used The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance 0.491 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.62 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 199 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 us1000i56k Id of event.
Event Code 1000i56k An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us1000i56k, A comma-separated list of event ids that are associated to an event.

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