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Light earthquake 4.34 mag, 4 km SSW of Guánica, Puerto Rico


Earthquake location 17.9351S, -66.9231WA light earthquake magnitude 4.34 (ml/mb) strikes 4 kilometers (2 miles) from Guánica in Puerto Rico on Sunday. The epicenter of the earthquake was roughly 12 km (7 miles) below the earth’s surface. Exact location, longitude -66.9231° West, latitude 17.9351° North, depth = 12 km. The temblor was reported at 11:54:21 / 11:54 am (local time epicenter). Global time and date of event 28/06/20 / 2020-06-28 11:54:21 / June 28, 2020 @ 11:54 am UTC/GMT. Unique identifier: pr2020180009. Ids that are associated to the event: us7000adp3, pr2020180009. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist).

Event epicenter was 34 km (21 miles) from Ponce (c. 152 600 pop), 37 km (23 miles) from Mayagüez (c. 78 600 pop), 64 km (40 miles) from Arecibo (c. 49 300 pop), 80 km (50 miles) from Vega Baja (c. 29 300 pop), 70 km (44 miles) from Barceloneta (c. 22 300 pop), 86 km (53 miles) from Guayama (c. 21 600 pop). Nearby country/countries, Puerto Rico (c. 3 917 000 pop) (That might be effected). Nearest cities/city/villages to epicentrum/hypocenter was Aguas Buenas, Ingenio, Candelaria Arenas (min 5000 pop).

In the past 24 hours, there have been twenty-two, in the last 10 days sixty-one, in the past 30 days one hundred and sixty and in the last 365 days two thousand, two hundred and seventy-six earthquakes of magnitude 3.0 or greater that have been detected nearby. Earthquakes 4.0 to 5.0 are often felt, but only causes minor damage. Each 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. Read more about the earthquake, Location, Distances, Seismometer information, Date-Time, Parameters and details about this quake, reported near: 4 km SSW of Guánica, Puerto Rico. This information comes from the USGS Earthquake Notification Service.

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More information

Parameter Value Description
Magnitude 4.34 mb The magnitude for the event.
Longitude -66.9231° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 17.9351° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 12 km Depth of the event in kilometers.
Place 4 km SSW of Guánica, 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 2020-06-28 11:54:21 Time when the event occurred. UTC/GMT
Updated 2020-06-28 12:49:46 Time when the event was most recently updated. UTC/GMT
Timezone offset Timezone offset from UTC in minutes at the event epicenter.
Felt 8 The total number of felt reports
CDI 3.4 The maximum reported intensity for the event.
MMI 3.141 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 292 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 ,us,pr, A comma-separated list of network contributors.
Number of Stations Used 26 The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance 0.0594 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.15 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 208 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 pr2020180009 Id of event.
Event Code 2020180009 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us7000adp3,pr2020180009, A comma-separated list of event ids that are associated to an event.

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