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Light World Earthquakes Magnitude 4-4.9

Light earthquake, 4 mag strikes near Yigo Village in Guam

Earthquake location 13.6283S, 144.8493WA light earthquake magnitude 4 (ml/mb) has occurred on Saturday, 11 kilometers (7 miles) from Yigo Village in Guam. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Unique identifier: us7000ddk0. Ids that are associated to the event: us7000ddk0. The earthquake occurred at a depth of 98.04 km (61 miles) below the earth’s surface. Exact time and date of earthquake 20/02/21 / 2021-02-20 03:01:59 / February 20, 2021 @ 3:01 am UTC/GMT. Exact location of event, longitude 144.8493 East, latitude 13.6283 North, depth = 98.04 km. The temblor was detected at 03:01:59 / 3:01 am (local time epicenter).

Event epicenter was 12 km (8 miles) from Dededo Village (c. 44 900 pop), 11 km (7 miles) from Yigo Village (c. 20 500 pop), 17 km (11 miles) from Tamuning-Tumon-Harmon Village (c. 19 700 pop), 21 km (13 miles) from Mangilao Village (c. 15 200 pop), 19 km (12 miles) from Barrigada Village (c. 8 900 pop), 33 km (21 miles) from Santa Rita Village (c. 7 500 pop). Nearest cities/city/towns to hypocenter/epicentrum was Merizo Village, Umatac Village, Inarajan Village (min 5000 pop). Nearby country/countries that might be effected, Guam (c. 159 000 pop).

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

Did you feel anything?

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. 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: 11 km NNW of Yigo Village, Guam.

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More information

Parameter Value Description
Magnitude 4 mb The magnitude for the event.
Longitude 144.8493° East Decimal degrees longitude. Negative values for western longitudes.
Latitude 13.6283° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 98.04 km Depth of the event in kilometers.
Place 11 km NNW of Yigo 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 2021-02-20 03:01:59 Time when the event occurred. UTC/GMT
Updated 2021-02-25 23:51:14 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 0.043 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.36 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 145 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 us7000ddk0 Id of event.
Event Code 7000ddk0 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us7000ddk0, A comma-separated list of event ids that are associated to an event.

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