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Minor World Earthquakes Magnitude -3.9

Minor earthquake 3.9 mag, 7 km SE of Guanica, Puerto Rico


Earthquake location 17.921S, -66.8547WA minor earthquake with magnitude 3.9 (ml/mb) was reported 7 kilometers (4 miles) from Guanica in Puerto Rico on Tuesday. Exact location of event, depth 10 km, -66.8547° West, 17.921° North. The 3.9-magnitude earthquake was detected at 06:18:27 / 6:18 am (local time epicenter). The epicenter was at a depth of 10 km (6 miles). Exact time and date of event in UTC/GMT: 07/01/20 / 2020-01-07 10:18:27 / January 7, 2020 @ 10:18 am. Event id: us60007c6u. Ids that are associated to the earthquake: us60007c6u.

Epicenter of the event was 27 km (17 miles) from Ponce (c. 152 600 pop), 43 km (27 miles) from Mayagüez (c. 78 600 pop), 63 km (39 miles) from Arecibo (c. 49 300 pop), 76 km (47 miles) from Vega Baja (c. 29 300 pop), 68 km (42 miles) from Barceloneta (c. 22 300 pop), 79 km (49 miles) from Guayama (c. 21 600 pop). 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 Ingenio, Aguas Buenas, Candelaria Arenas.

In the past 24 hours, there have been seven hundred and eighty, in the last 10 days eight hundred and fourty-two, in the past 30 days eight hundred and fifty-three and in the last 365 days nine hundred earthquakes of magnitude 3.0 or greater that was reported nearby. Each year there are an estimated 130,000 minor quakes in the world. Earthquakes 3.0 to 4.0 are often felt, but only causes minor damage.

How would you describe the shaking?

Did objects rattle, topple over, or fall off shelves? Leave a comment or report about activity, shaking and damage at your home, country and city. 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: 7 km SE of Guanica, Puerto Rico.

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More information

Parameter Value Description
Magnitude 3.9 mb The magnitude for the event.
Longitude -66.8547° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 17.921° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 10 km Depth of the event in kilometers.
Place 7km SE of Guanica, 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 2020-01-07 10:18:27 Time when the event occurred. UTC/GMT
Updated 2020-01-28 10:48:24 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 3.214 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 234 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 0.257 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.35 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 87 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 us60007c6u Id of event.
Event Code 60007c6u An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us60007c6u, A comma-separated list of event ids that are associated to an event.

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