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Minor earthquake: M3.5 quake has struck near Guanica in Puerto Rico


Earthquake location 17.9338S, -66.8535WA minor earthquake magnitude 3.5 (ml/mb) strikes 12 kilometers (7 miles) from Guanica in Puerto Rico on Saturday. The 3.5-magnitude earthquake has occurred at 20:34:01 / 8:34 pm (local time epicenter). The earthquake was roughly at a depth of 6 km (4 miles). Id of earthquake: pr2019363001. Event ids that are associated: us70006s1t, pr2019363001. Exact location of earthquake, -66.8535° West, 17.9338° North, depth 6 km. Global time and date of event 29/12/19 / 2019-12-29 00:34:01 / December 29, 2019 @ 12:34 am UTC/GMT.

Epicenter of the event was 27 km (17 miles) from Ponce (c. 152 600 pop), 42 km (26 miles) from Mayagüez (c. 78 600 pop), 62 km (38 miles) from Arecibo (c. 49 300 pop), 75 km (47 miles) from Vega Baja (c. 29 300 pop), 66 km (41 miles) from Barceloneta (c. 22 300 pop), 78 km (49 miles) from Guayama (c. 21 600 pop). Nearby country/countries that might be effected, Puerto Rico (c. 3 917 000 pop). Closest city/cities/towns to epicentrum/hypocenter was Pájaros, San Antonio, Toa Alta (min 5000 pop).

Earthquakes 3.0 to 4.0 are often felt, but only causes minor damage. Each year there are an estimated 130,000 minor earthquakes in the world. In the past 24 hours, there have been sixteen, in the last 10 days twenty-four, in the past 30 days thirty-one and in the last 365 days seventy-nine earthquakes of magnitude 3.0 or greater that have been detected in the same area.

Did you feel anything?

How did you respond? Did any furniture slide, topple over, or become displaced? Leave a comment or report about activity, shaking and damage at your home, city 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: 12 km SE of Guanica, Puerto Rico.

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More information

Parameter Value Description
Magnitude 3.5 mb The magnitude for the event.
Longitude -66.8535° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 17.9338° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 6 km Depth of the event in kilometers.
Place 12km 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 2019-12-29 00:34:01 Time when the event occurred. UTC/GMT
Updated 2019-12-29 01:21:06 Time when the event was most recently updated. UTC/GMT
Timezone offset -240 Timezone offset from UTC in minutes at the event epicenter.
Felt 16 The total number of felt reports
CDI 4.6 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 196 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 14 The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance 0.0486 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.18 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 205 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 pr2019363001 Id of event.
Event Code 2019363001 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us70006s1t,pr2019363001, A comma-separated list of event ids that are associated to an event.

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