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Light earthquake: M4.27 quake has struck near San Antonio in Puerto Rico


Earthquake location 18.9628S, -67.2188WA light earthquake magnitude 4.27 (ml/mb) strikes 63 kilometers (39 miles) from San Antonio in Puerto Rico on Tuesday. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Exact time and date of event in UTC/GMT: 24/09/19 / 2019-09-24 04:09:51 / September 24, 2019 @ 4:09 am. Exact location of earthquake, longitude -67.2188 West, latitude 18.9628 North, depth = 21 km. Event ids that are associated to the earthquake: pt19267004, us60005mjw, pr2019267001. Id of event: pr2019267001. The epicenter of the earthquake was roughly 21 km (13 miles) below the earth’s surface. The 4.27-magnitude earthquake has occurred at 00:09:51 / 12:09 am (local time epicenter).

Nearest city/cities or towns, with min 5000 pop, to epicentrum/hypocenter was Hormigueros, Barceloneta, Maricao. Close country/countries, Puerto Rico (c. 3 917 000 pop) (That might be effected). Epicenter of the earthquake was 85 km (53 miles) from Mayagüez (c. 78 600 pop), 76 km (47 miles) from Arecibo (c. 49 300 pop), 92 km (57 miles) from Barceloneta (c. 22 300 pop), 60 km (37 miles) from Aguadilla (c. 16 100 pop), 55 km (34 miles) from Isabela (c. 12 500 pop), 92 km (57 miles) from Hormigueros (c. 11 900 pop).

There are an estimated 13,000 light earthquakes in the world each year. Earthquakes 4.0 to 5.0 are often felt, but only causes minor damage. In the past 24 hours, there have been twelve, in the last 10 days eighteen, in the past 30 days thirty-four and in the last 365 days three hundred and seventy-six earthquakes of magnitude 3.0 or greater that has struck near.

How would you describe the shaking?

What was your situation during the earthquake? Leave a comment or report about damage, shaking and activity at your home, city and country. 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: 63 km NNW of San Antonio, Puerto Rico.

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More information

Parameter Value Description
Magnitude 4.27 mb The magnitude for the event.
Longitude -67.2188° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 18.9628° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 21 km Depth of the event in kilometers.
Place 63km 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 2019-09-24 04:09:51 Time when the event occurred. UTC/GMT
Updated 2019-09-24 05:06:00 Time when the event was most recently updated. UTC/GMT
Timezone offset -240 Timezone offset from UTC in minutes at the event epicenter.
Felt 81 The total number of felt reports
CDI 5.4 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 324 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 ,pt,us,pr, A comma-separated list of network contributors.
Number of Stations Used 23 The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance 0.5069 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.42 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 md The method or algorithm used to calculate the preferred magnitude for the event.
Event Type earthquake Type of seismic event.
Event ID pr2019267001 Id of event.
Event Code 2019267001 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,pt19267004,us60005mjw,pr2019267001, A comma-separated list of event ids that are associated to an event.

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