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Light World Earthquakes Magnitude 4-4.9

Light earthquake 4.2 mag, 58 km NNW of Asan-Maina Village, Guam

Earthquake location 13.9659S, 144.5229WA light earthquake magnitude 4.2 (ml/mb) has struck on Sunday, 58 kilometers (36 miles) from Asan-Maina Village in Guam. The temblor was detected at 06:17:17 / 6:17 am (local time epicenter). Exact location of earthquake, longitude 144.5229 East, latitude 13.9659 North, depth = 171.6 km. Date and time of earthquake in UTC/GMT: 21/06/20 / 2020-06-21 06:17:17 / June 21, 2020 @ 6:17 am. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). The earthquake occurred at a depth of 171.6 km (107 miles) below the earth’s surface. All ids that are associated to the event: us7000ac6t. Unique identifier: us7000ac6t.

Country/countries that might be effected, Guam (c. 159 000 pop). Closest city/cities/towns to epicentrum/hypocenter was Inarajan Village, Merizo Village, Umatac Village (min 5000 pop). The epicenter was 60 km (38 miles) from Dededo Village (c. 44 900 pop), 62 km (39 miles) from Yigo Village (c. 20 500 pop), 60 km (37 miles) from Tamuning-Tumon-Harmon Village (c. 19 700 pop), 65 km (40 miles) from Mangilao Village (c. 15 200 pop), 63 km (39 miles) from Barrigada Village (c. 8 900 pop), 66 km (41 miles) from Santa Rita Village (c. 7 500 pop).

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

Questions or comments?

What was your situation during the earthquake? Leave a comment or report about damage, shaking and activity at your home, city 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: 58 km NNW of Asan-Maina Village, Guam.

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More information

Parameter Value Description
Magnitude 4.2 mb The magnitude for the event.
Longitude 144.5229° East Decimal degrees longitude. Negative values for western longitudes.
Latitude 13.9659° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 171.6 km Depth of the event in kilometers.
Place 58 km NNW of Asan-Maina 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 2020-06-21 06:17:17 Time when the event occurred. UTC/GMT
Updated 2020-07-12 12:55:51 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 0.502 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.54 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 103 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 us7000ac6t Id of event.
Event Code 7000ac6t An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us7000ac6t, A comma-separated list of event ids that are associated to an event.

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