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Light World Earthquakes Magnitude 4-4.9

Light earthquake 4.2 mag, 83 km WSW of Merizo Village, Guam


Earthquake location 12.875S, 144.0051WA light earthquake magnitude 4.2 (ml/mb) has struck on Sunday, 83 kilometers (52 miles) from Merizo Village in Guam. The temblor was detected at 15:35:15 / 3:35 pm (local time epicenter). A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Exact time and date of event in UTC/GMT: 20/12/20 / 2020-12-20 15:35:15 / December 20, 2020 @ 3:35 pm. Exact location of earthquake, longitude 144.0051 East, latitude 12.875 North, depth = 102.46 km. Unique identifier: us6000d27w. Ids that are associated to the event: us6000d27w. The earthquake occurred at a depth of 102.46 km (64 miles) below the earth’s surface.

Epicenter of the event was 92 km (57 miles) from Santa Rita Village (c. 7 500 pop), 91 km (56 miles) from Agat Village (c. 5 700 pop), 92 km (57 miles) from Inarajan Village (c. 3 100 pop), 84 km (52 miles) from Merizo Village (c. 2 200 pop), 85 km (53 miles) from Umatac Village (c. 900 pop). Nearest cities/city/villages to epicentrum/hypocenter was Santa Rita Village, Inarajan Village, Agat Village (min 5000 pop). Close country/countries that might be effected, Guam (c. 159 000 pop).

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

Did you feel the quake?

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 data comes from the USGS Earthquake Notification Service. Read more about the earthquake, Seismometer information, Distances, Parameters, Date-Time, Location and details about this quake, that has occurred near: 83 km WSW of Merizo Village, Guam.

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More information

Parameter Value Description
Magnitude 4.2 mb The magnitude for the event.
Longitude 144.0051° East Decimal degrees longitude. Negative values for western longitudes.
Latitude 12.875° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 102.46 km Depth of the event in kilometers.
Place 83 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 2020-12-20 15:35:15 Time when the event occurred. UTC/GMT
Updated 2020-12-23 16:03:35 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 271 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 1.1 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.43 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 75 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 us6000d27w Id of event.
Event Code 6000d27w An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us6000d27w, A comma-separated list of event ids that are associated to an event.

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