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Minor earthquake, 3.1 mag strikes near Unalaska in Alaska

Earthquake location 53.1717S, -166.7811WA minor earthquake magnitude 3.1 (ml/mb) strikes 79 km SSW of Unalaska, Alaska (49 miles) on Friday. Exact location of earthquake, longitude -166.7811 West, latitude 53.1717 North, depth = 41.9 km. Event ids that are associated to the earthquake: ak0201r2uy9w. Id of event: ak0201r2uy9w. The earthquake occurred at a depth of 41.9 km (26 miles). The 3.1-magnitude earthquake was detected at 03:17:23 / 3:17 am (local time epicenter). Date and time of earthquake in UTC/GMT: 07/02/20 / 2020-02-07 14:17:23 / February 7, 2020 @ 2:17 pm.

In the past 24 hours, there have been one, in the last 10 days one, in the past 30 days five and in the last 365 days ninety-two earthquakes of magnitude 3.0 or greater that have been detected nearby. Earthquakes 2.5 to 3.5 are often felt, but only causes minor damage. Each year there are an estimated 130,000 minor quakes in the world.

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. Read more about the earthquake, Location, Distances, Seismometer information, Date-Time, Parameters and details about this quake, reported near: 79 km SSW of Unalaska, Alaska. This information comes from the USGS Earthquake Notification Service.

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More information

Parameter Value Description
Magnitude 3.1 mb The magnitude for the event.
Longitude -166.7811° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 53.1717° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 41.9 km Depth of the event in kilometers.
Place 79km SSW of Unalaska, Alaska Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2020-02-07 14:17:23 Time when the event occurred. UTC/GMT
Updated 2020-02-17 22:19:52 Time when the event was most recently updated. UTC/GMT
Timezone offset -660 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 148 A number describing how significant the event is. Larger numbers indicate a more significant event.
Network ak The ID of a data contributor. Identifies the network considered to be the preferred source of information for this event.
Sources ,ak, 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 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.46 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 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 ak0201r2uy9w Id of event.
Event Code 0201r2uy9w An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,ak0201r2uy9w, A comma-separated list of event ids that are associated to an event.

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