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Light World Earthquakes Magnitude 4-4.9

Light earthquake, 4.2 mag strikes near Attu Station in Alaska

Earthquake location 52.1857S, 175.0698WA light earthquake magnitude 4.2 (ml/mb) strikes 147 km ESE of Attu Station, Alaska (91 miles) on Saturday. Exact location of earthquake, longitude 175.0698 East, latitude 52.1857 North, depth = 48.1 km. The temblor was detected at 01:45:10 / 1:45 am (local time epicenter). The earthquake was roughly at a depth of 48.1 km (30 miles). Date and time of earthquake in UTC/GMT: 13/02/21 / 2021-02-13 01:45:10 / February 13, 2021 @ 1:45 am. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Event ids that are associated to the earthquake: us6000djc9. Id of event: us6000djc9.

In the past 24 hours, there have been one, in the last 10 days one, in the past 30 days one and in the last 365 days twenty-five earthquakes of magnitude 3.0 or greater that has struck near. 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.

Questions or comments?

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: 147 km ESE of Attu Station, Alaska.

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More information

Parameter Value Description
Magnitude 4.2 mb The magnitude for the event.
Longitude 175.0698° East Decimal degrees longitude. Negative values for western longitudes.
Latitude 52.1857° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 48.1 km Depth of the event in kilometers.
Place 147 km ESE of Attu Station, Alaska Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2021-02-13 01:45:10 Time when the event occurred. UTC/GMT
Updated 2021-02-20 02:29:17 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 0.805 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.7 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 175 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 us6000djc9 Id of event.
Event Code 6000djc9 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us6000djc9, A comma-separated list of event ids that are associated to an event.

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