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Minor earthquake, 3.1 mag strikes near Guayanilla in Puerto Rico


Earthquake location 18.0521S, -66.7904WA minor earthquake with magnitude 3.1 (ml/mb) was reported 3 kilometers (2 miles) from Guayanilla in Puerto Rico on Friday. Exact time and date of earthquake 18/01/20 / 2020-01-18 01:29:59 / January 18, 2020 @ 1:29 am UTC/GMT. Exact location of event, depth 5 km, -66.7904° West, 18.0521° North. The epicenter of the earthquake was roughly 5 km (3 miles) below the earth’s surface. Id of earthquake: us600079nb. Event ids that are associated: us600079nb. The 3.1-magnitude earthquake has occurred at 21:29:59 / 9:29 pm (local time epicenter).

Epicenter of the earthquake was 77 km (48 miles) from Bayamón (c. 203 500 pop), 19 km (12 miles) from Ponce (c. 152 600 pop), 79 km (49 miles) from Guaynabo (c. 81 400 pop), 40 km (25 miles) from Mayagüez (c. 78 600 pop), 47 km (29 miles) from Arecibo (c. 49 300 pop). Nearest cities/city/villages to epicentrum/hypocenter was Guaynabo, Levittown, Arroyo (min 5000 pop). Nearby country/countries, Puerto Rico (c. 3 917 000 pop) (That might be effected).

In the past 24 hours, there have been thirty-four, in the last 10 days three hundred and seventy-nine, in the past 30 days five hundred and fifty-six and in the last 365 days six hundred and sixty-four earthquakes of magnitude 3.0 or greater that has struck near. Earthquakes 2.5 to 3.2 are often felt, but only causes minor damage. There are an estimated 130,000 minor quakes in the world each year.

Questions or comments?

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: 3 km N of Guayanilla, Puerto Rico.

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More information

Parameter Value Description
Magnitude 3.1 mb The magnitude for the event.
Longitude -66.7904° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 18.0521° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 5 km Depth of the event in kilometers.
Place 3km N of Guayanilla, 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 2020-01-18 01:29:59 Time when the event occurred. UTC/GMT
Updated 2020-01-18 01:52:39 Time when the event was most recently updated. UTC/GMT
Timezone offset -240 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 0.043 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.79 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 108 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 us600079nb Id of event.
Event Code 600079nb An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us600079nb, A comma-separated list of event ids that are associated to an event.

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