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Light World Earthquakes Magnitude 4-4.9

Light earthquake, 4.2 mag was detected near Umatac Village in Guam


Earthquake location 13.2339S, 143.8867WA light earthquake with magnitude 4.2 (ml/mb) was detected on Tuesday, 84 kilometers (52 miles) from Umatac Village in Guam. The earthquake was roughly at a depth of 10 km (6 miles). A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Exact location, longitude 143.8867° East, latitude 13.2339° North, depth = 10 km. Date and time of earthquake in UTC/GMT: 22/09/20 / 2020-09-22 01:50:14 / September 22, 2020 @ 1:50 am. Unique identifier: us6000c17i. Ids that are associated to the event: us6000c17i. The 4.2-magnitude earthquake was detected at 01:50:14 / 1:50 am (local time epicenter).

Closest city/cities/towns to epicentrum/hypocenter was Piti Village, Santa Rita Village, Agat Village (min 5000 pop). Event epicenter was 87 km (54 miles) from Santa Rita Village (c. 7 500 pop), 85 km (53 miles) from Agat Village (c. 5 700 pop), 85 km (53 miles) from Merizo Village (c. 2 200 pop), 91 km (56 miles) from Piti Village (c. 1 700 pop), 84 km (52 miles) from Umatac Village (c. 900 pop). Close 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. Each year there are an estimated 13,000 light quakes in the world. In the past 24 hours, there have been four, in the last 10 days four, in the past 30 days five and in the last 365 days fifty-one earthquakes of magnitude 3.0 or greater that have been detected in the same area.

Did you feel the quake?

How did you react? Was there any damage to buildings? Leave a comment or report about shaking, activity and damage at your home, city and country. Read more about the earthquake, Location, Distances, Seismometer information, Date-Time, Parameters and details about this quake, reported near: 84 km W of Umatac Village, Guam. This information comes from the USGS Earthquake Notification Service.

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More information

Parameter Value Description
Magnitude 4.2 mb The magnitude for the event.
Longitude 143.8867° East Decimal degrees longitude. Negative values for western longitudes.
Latitude 13.2339° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 10 km Depth of the event in kilometers.
Place 84 km W of Umatac 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 2020-09-22 01:50:14 Time when the event occurred. UTC/GMT
Updated 2020-10-08 01:45:56 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 1.018 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.94 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 122 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 us6000c17i Id of event.
Event Code 6000c17i An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us6000c17i, A comma-separated list of event ids that are associated to an event.

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