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Light earthquake: M4.4 quake has struck near Isabela in Puerto Rico


Earthquake location 19.1201S, -67.1776WA light earthquake magnitude 4.4 (ml/mb) strikes 70 kilometers (43 miles) from Isabela in Puerto Rico on Tuesday. The epicenter of the earthquake was roughly 10 km (6 miles) below the earth’s surface. Exact time and date of event in UTC/GMT: 24/09/19 / 2019-09-24 08:37:56 / September 24, 2019 @ 8:37 am. The 4.4-magnitude earthquake was detected at 04:37:56 / 4:37 am (local time epicenter). Event ids that are associated to the earthquake: pt19267011, us60005mnh. Id of event: us60005mnh. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Exact location of earthquake, longitude -67.1776 West, latitude 19.1201 North, depth = 10 km.

Nearest cities/city/villages to epicentrum/hypocenter was Añasco, San Sebastián, Rincón (min 5000 pop). Country/countries that might be effected, Puerto Rico (c. 3 917 000 pop). Earthquake epicenter was 87 km (54 miles) from Arecibo (c. 49 300 pop), 77 km (48 miles) from Aguadilla (c. 16 100 pop), 71 km (44 miles) from Isabela (c. 12 500 pop), 89 km (56 miles) from San Sebastián (c. 11 600 pop), 93 km (58 miles) from Añasco (c. 6 100 pop), 80 km (49 miles) from Hatillo (c. 5 600 pop).

Every year there are an estimated 13,000 light earthquakes in the world. In the past 24 hours, there have been twenty, in the last 10 days twenty-four, in the past 30 days thirty-nine and in the last 365 days three hundred and sixty-five 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.

How would you describe the shaking?

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: 70 km NNW of Isabela, Puerto Rico.

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More information

Parameter Value Description
Magnitude 4.4 mb The magnitude for the event.
Longitude -67.1776° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 19.1201° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 10 km Depth of the event in kilometers.
Place 70km NNW of Isabela, 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 08:37:56 Time when the event occurred. UTC/GMT
Updated 2019-09-24 08:57:23 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 298 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 ,pt,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 0.867 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 1.1 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 us60005mnh Id of event.
Event Code 60005mnh An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,pt19267011,us60005mnh, A comma-separated list of event ids that are associated to an event.

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