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Minor earthquake, 3.17 mag has occurred near Isabela in Puerto Rico


Earthquake location 18.9998S, -66.8878WA minor earthquake magnitude 3.17 (ml/mb) has struck on Monday, 57 kilometers (35 miles) from Isabela in Puerto Rico. The 3.17-magnitude earthquake has occurred at 22:07:37 / 10:07 pm (local time epicenter). Exact location of earthquake, longitude -66.8878 West, latitude 18.9998 North, depth = 10 km. Exact time and date of earthquake 02/01/18 / 2018-01-02 02:07:37 / January 2, 2018 @ 2:07 am UTC/GMT. The earthquake was roughly at a depth of 10 km (6 miles). All ids that are associated to the event: pr2018002001. Unique identifier: pr2018002001.

Nearby country/countries that might be effected, Puerto Rico (c. 3 917 000 pop). Nearest city/cities or towns, with min 5000 pop, to epicentrum/hypocenter was Florida, Lares, Estancias de Florida. Earthquake epicenter was 61 km (38 miles) from Arecibo (c. 49 300 pop), 71 km (44 miles) from Barceloneta (c. 22 300 pop), 76 km (47 miles) from Manatí (c. 16 100 pop), 70 km (43 miles) from Aguadilla (c. 16 100 pop), 57 km (36 miles) from Isabela (c. 12 500 pop).

Each year there are an estimated 130,000 minor earthquakes in the world. In the past 24 hours, there have been four, in the last 10 days seventeen, in the past 30 days thirty-seven and in the last 365 days two hundred and eighty-three earthquakes of magnitude 3.0 or greater that have been detected nearby. Earthquakes 2.5 to 3.2 are often felt, but only causes minor damage.

Questions or comments?

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. 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: 57 km NNE of Isabela, Puerto Rico.

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More information

Parameter Value Description
Magnitude 3.17 mb The magnitude for the event.
Longitude -66.8878° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 18.9998° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 10 km Depth of the event in kilometers.
Place 57km NNE of Isabela, 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 2018-01-02 02:07:37 Time when the event occurred. UTC/GMT
Updated 2018-01-02 05:44:53 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 155 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 0.5773 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.24 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 221 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 pr2018002001 Id of event.
Event Code 2018002001 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,pr2018002001, A comma-separated list of event ids that are associated to an event.

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