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Light earthquake: M4 quake has struck near Merizo Village in Guam

Earthquake location 13.1398S, 144.0653WA light earthquake magnitude 4 (ml/mb) has occurred on Wednesday, 66 kilometers (41 miles) from Merizo Village in Guam. The earthquake was roughly at a depth of 130.88 km (81 miles). The temblor was picked up at 04:25:41 / 4:25 am (local time epicenter). Exact location of earthquake, longitude 144.0653 East, latitude 13.1398 North, depth = 130.88 km. Event id: us6000d5ru. Ids that are associated to the earthquake: us6000d5ru. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Global time and date of event 23/12/20 / 2020-12-23 04:25:41 / December 23, 2020 @ 4:25 am UTC/GMT.

Country/countries that might be effected, Guam (c. 159 000 pop). Nearest city/cities or towns, with min 5000 pop, to epicentrum/hypocenter was Barrigada Village, Mangilao Village, Tamuning-Tumon-Harmon Village. Epicenter of the event was 87 km (54 miles) from Tamuning-Tumon-Harmon Village (c. 19 700 pop), 87 km (54 miles) from Mangilao Village (c. 15 200 pop), 87 km (54 miles) from Barrigada Village (c. 8 900 pop), 71 km (44 miles) from Santa Rita Village (c. 7 500 pop), 86 km (53 miles) from Mongmong-Toto-Maite Village (c. 6 800 pop), 82 km (51 miles) from Chalan Pago-Ordot Village (c. 6 800 pop).

In the past 24 hours, there have been one, in the last 10 days three, in the past 30 days thirteen and in the last 365 days sixty-four earthquakes of magnitude 3.0 or greater that have been detected nearby. There are an estimated 13,000 light quakes in the world each year. Earthquakes 4.0 to 5.0 are often felt, but only causes minor damage.

Did you feel it?

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. Read more about the earthquake, Location, Distances, Seismometer information, Date-Time, Parameters and details about this quake, reported near: 66 km WSW of Merizo Village, Guam. This information comes from the USGS Earthquake Notification Service.

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More information

Parameter Value Description
Magnitude 4 mb The magnitude for the event.
Longitude 144.0653° East Decimal degrees longitude. Negative values for western longitudes.
Latitude 13.1398° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 130.88 km Depth of the event in kilometers.
Place 66 km WSW of Merizo Village, Guam Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2020-12-23 04:25:41 Time when the event occurred. UTC/GMT
Updated 2021-01-07 00:00:12 Time when the event was most recently updated. UTC/GMT
Timezone offset 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 246 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 0.9 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.34 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 120 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 us6000d5ru Id of event.
Event Code 6000d5ru An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us6000d5ru, A comma-separated list of event ids that are associated to an event.

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