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Minor earthquake 2.8 mag, 51 km NNW of San Antonio, Puerto Rico


Earthquake location 18.9375S, -67.2399WA minor earthquake magnitude 2.8 (ml/mb) strikes 51 kilometers (32 miles) from San Antonio in Puerto Rico on Saturday. Exact time and date of event in UTC/GMT: 18/07/15 / 2015-07-18 16:35:44 / July 18, 2015 @ 4:35 pm. Id of earthquake: pr15199027. Event ids that are associated: pr15199027. Exact location of earthquake, longitude -67.2399 West, latitude 18.9375 North, depth = 80 km. The temblor was picked up at 12:35:44 / 12:35 pm (local time epicenter). The epicenter of the earthquake was roughly 80 km (50 miles) below the earth’s surface.

Closest city/cities/towns to epicentrum/hypocenter was Arecibo, Añasco, San Sebastián (min 5000 pop). The epicenter was 76 km (47 miles) from Arecibo (c. 49 300 pop), 57 km (36 miles) from Aguadilla (c. 16 100 pop), 54 km (33 miles) from Isabela (c. 12 500 pop), 72 km (45 miles) from San Sebastián (c. 11 600 pop), 74 km (46 miles) from Añasco (c. 6 100 pop). Close country/countries, Puerto Rico (c. 3 917 000 pop) (That might be effected).

Earthquakes 2.5 to 2.9 are often felt, but only causes minor damage. In the past 24 hours, there have been thirteen, in the last 10 days fourty-five, in the past 30 days fifty-two and in the last 365 days two hundred and thirty-six earthquakes of magnitude 3.0 or greater that have been detected nearby. Each year there are an estimated 1,300,000 minor earthquakes in the world.

Did you feel the quake?

Were you asleep? Was it difficult to stand and/or walk? Leave a comment or report about shaking, activity and damage at your city, home and country. Read more about the earthquake, Distances, Seismometer information, Date-Time, Parameters, Location and details about this quake, that has struck: 51 km NNW of San Antonio, Puerto Rico. This data comes from the USGS Earthquake Notification Service.

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More information

Parameter Value Description
Magnitude 2.8 mb The magnitude for the event.
Longitude -67.2399° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 18.9375° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 80 km Depth of the event in kilometers.
Place 51km NNW of San Antonio, 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 2015-07-18 16:35:44 Time when the event occurred. UTC/GMT
Updated 2015-07-18 18:44:37 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 121 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 4 The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance 0.74560169 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.2 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 331.2 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 pr15199027 Id of event.
Event Code 15199027 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,pr15199027, A comma-separated list of event ids that are associated to an event.

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