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Minor earthquake, 3.1 mag has occurred near Unimak Island region, Alaska



Earthquake location 53.8899S, -164.2615WA minor earthquake magnitude 3.1 (ml/mb) has occurred on Tuesday, Unimak Island region, Alaska (0 miles). Exact location of earthquake, -164.2615° West, 53.8899° North, depth 47.1 km. The earthquake occurred at a depth of 47.1 km (29 miles). Date and time of earthquake in UTC/GMT: 22/09/15 / 2015-09-22 13:48:22 / September 22, 2015 @ 1:48 pm. Unique identifier: ak11719805. Ids that are associated to the event: ak11719805. The temblor was picked up at 13:48:22 / 1:48 pm (local time epicenter).

There are an estimated 130,000 minor quakes in the world each year. In the past 24 hours, there have been three, in the last 10 days three, in the past 30 days twelve and in the last 365 days one hundred and eleven 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.

How would you describe the shaking?

How did you respond? Did any furniture slide, topple over, or become displaced? Leave a comment or report about activity, shaking and damage at your home, city and country. This data comes from the USGS Earthquake Notification Service. Read more about the earthquake, Seismometer information, Distances, Parameters, Date-Time, Location and details about this quake, that has occurred near: Unimak Island region, Alaska.

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More information

Parameter Value Description
Magnitude 3.1 mb The magnitude for the event.
Longitude -164.2615° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 53.8899° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 47.1 km Depth of the event in kilometers.
Place Unimak Island region, Alaska Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2015-09-22 13:48:22 Time when the event occurred. UTC/GMT
Updated 2015-10-01 09:28:52 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 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 0.38 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 ak11719805 Id of event.
Event Code 11719805 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,ak11719805, A comma-separated list of event ids that are associated to an event.

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