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Light earthquake, 4.1 mag strikes near San Juan in Puerto Rico


Earthquake location 18.48S, -66.134WA light earthquake with magnitude 4.1 (ml/mb) was detected on Thursday, 3 kilometers (2 miles) from San Juan in Puerto Rico. Exact location of event, longitude -66.134 West, latitude 18.48 North, depth = 131 km. A tsunami warning has been issued near San Juan in Puerto Rico (Does not indicate if a tsunami actually did or will exist). The temblor was picked up at 21:24:25 / 9:24 pm (local time epicenter). Exact time and date of event in UTC/GMT: 14/10/16 / 2016-10-14 01:24:25 / October 14, 2016 @ 1:24 am. The epicenter was at a depth of 131 km (81 miles). Unique identifier: at00of0jwp. Ids that are associated to the event: at00of0jwp.

Nearby country/countries that might be effected, Puerto Rico (c. 3 917 000 pop). Epicenter of the event was 3 km (2 miles) from San Juan (c. 418 100 pop), 9 km (6 miles) from Bayamón (c. 203 500 pop), 22 km (13 miles) from Carolina (c. 170 400 pop), 73 km (45 miles) from Ponce (c. 152 600 pop), 29 km (18 miles) from Caguas (c. 86 800 pop), 14 km (9 miles) from Guaynabo (c. 81 400 pop). Closest city/cities or villages, with min 5000 pop, to hypocenter/epicentrum was Yauco, Culebra, Guayanilla.

Earthquakes 4.0 to 5.0 are often felt, but only causes minor damage. In the past 24 hours, there have been two, in the last 10 days six, in the past 30 days fourteen and in the last 365 days one hundred and sixty-nine earthquakes of magnitude 3.0 or greater that have been detected nearby. Each year there are an estimated 13,000 light quakes in the world.

Did you feel the quake?

How did you react? Was there any damage to buildings? Leave a comment or report about shaking, activity and damage at your home, city 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: 3 km WNW of San Juan, Puerto Rico.

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More information

Parameter Value Description
Magnitude 4.1 mb The magnitude for the event.
Longitude -66.134° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 18.48° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 131 km Depth of the event in kilometers.
Place 3km WNW of San Juan, 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 2016-10-14 01:24:25 Time when the event occurred. UTC/GMT
Updated 2016-10-14 01:31:06 Time when the event was most recently updated. UTC/GMT
Timezone offset -240 Timezone offset from UTC in minutes at the event epicenter.
Felt 2 The total number of felt reports
CDI 2 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 1 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 259 A number describing how significant the event is. Larger numbers indicate a more significant event.
Network at The ID of a data contributor. Identifies the network considered to be the preferred source of information for this event.
Sources ,at, A comma-separated list of network contributors.
Number of Stations Used 33 The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance 0.1760698 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.87 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 151.199987904 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 at00of0jwp Id of event.
Event Code 00of0jwp An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,at00of0jwp, A comma-separated list of event ids that are associated to an event.

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