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Light earthquake: M4.3 quake has struck near Guayanilla in Puerto Rico


Earthquake location 18.0179S, -66.7958WA light earthquake with magnitude 4.3 (ml/mb) was detected on Friday, 0 kilometers (0 miles) from Guayanilla in Puerto Rico. The earthquake occurred at a depth of 16.57 km (10 miles). Global time and date of event 28/02/20 / 2020-02-28 17:05:24 / February 28, 2020 @ 5:05 pm UTC/GMT. Event ids that are associated to the earthquake: us6000866j. Id of event: us6000866j. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). The temblor was detected at 13:05:24 / 1:05 pm (local time epicenter). Exact location of event, depth 16.57 km, -66.7958° West, 18.0179° North.

Closest city/cities/towns to epicentrum/hypocenter was Trujillo Alto, Gurabo, San Lorenzo (min 5000 pop). Close country/countries that might be effected, Puerto Rico (c. 3 917 000 pop). Epicenter of the event was 88 km (55 miles) from San Juan (c. 418 100 pop), 80 km (50 miles) from Bayamón (c. 203 500 pop), 19 km (12 miles) from Ponce (c. 152 600 pop), 83 km (51 miles) from Caguas (c. 86 800 pop), 82 km (51 miles) from Guaynabo (c. 81 400 pop), 42 km (26 miles) from Mayagüez (c. 78 600 pop).

In the past 24 hours, there have been eight, in the last 10 days one hundred and eighteen, in the past 30 days three hundred and ninety-seven and in the last 365 days one thousand, four hundred and eighty-nine earthquakes of magnitude 3.0 or greater that have been detected in the same area. Earthquakes 4.0 to 5.0 are often felt, but only causes minor damage. Every year there are an estimated 13,000 light 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. 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: 0 km WSW of Guayanilla, Puerto Rico.

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More information

Parameter Value Description
Magnitude 4.3 mb The magnitude for the event.
Longitude -66.7958° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 18.0179° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 16.57 km Depth of the event in kilometers.
Place 0km WSW 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 2020-02-28 17:05:24 Time when the event occurred. UTC/GMT
Updated 2020-02-28 17:21:54 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 284 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 0.025 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.52 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 150 The largest azimuthal gap between azimuthally adjacent stations (in degrees).
Magnitude Type mb The method or algorithm used to calculate the preferred magnitude for the event.
Event Type earthquake Type of seismic event.
Event ID us6000866j Id of event.
Event Code 6000866j An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us6000866j, A comma-separated list of event ids that are associated to an event.

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