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Minor World Earthquakes Magnitude -3.9

Minor earthquake, 3.9 mag strikes near Atka in Alaska


Earthquake location 52.4227S, -175.0233WA minor earthquake magnitude 3.9 (ml/mb) strikes 61 km WNW of Atka, Alaska (38 miles) on Sunday. Exact location of earthquake, -175.0233° West, 52.4227° North, depth 145.92 km. Id of earthquake: us10004sdr. Event ids that are associated: ak12863465, us10004sdr. Date and time of earthquake in UTC/GMT: 21/02/16 / 2016-02-21 23:42:19 / February 21, 2016 @ 11:42 pm. The temblor was detected at 13:42:19 / 1:42 pm (local time epicenter). The epicenter was at a depth of 145.92 km (91 miles).

Every year there are an estimated 130,000 minor earthquakes in the world. In the past 24 hours, there have been two, in the last 10 days nine, in the past 30 days fifteen and in the last 365 days one hundred and fourty-two earthquakes of magnitude 3.0 or greater that has occurred nearby. Earthquakes 3.0 to 4.0 are often felt, but only causes minor damage.

How would you describe the shaking?

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. This information comes from the USGS Earthquake Notification Service. Read more about the earthquake, Seismometer information, Date-Time, Location, Distances, Parameters and details about this quake, recorded: 61 km WNW of Atka, Alaska.

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More information

Parameter Value Description
Magnitude 3.9 mb The magnitude for the event.
Longitude -175.0233° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 52.4227° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 145.92 km Depth of the event in kilometers.
Place 61km WNW of Atka, Alaska Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2016-02-21 23:42:19 Time when the event occurred. UTC/GMT
Updated 2016-03-06 23:22:39 Time when the event was most recently updated. UTC/GMT
Timezone offset -600 Timezone offset from UTC in minutes at the event epicenter.
Felt 0 The total number of felt reports
CDI 1 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 234 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 ,ak,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 0.553 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.6 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 126 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 us10004sdr Id of event.
Event Code 10004sdr An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,ak12863465,us10004sdr, A comma-separated list of event ids that are associated to an event.

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