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Minor earthquake, 3.1 mag was detected near Little Sitkin Island in Alaska



Earthquake location 51.2011S, 178.4229WA minor earthquake magnitude 3.1 (ml/mb) has struck on Thursday, 83 km S of Little Sitkin Island, Alaska (52 miles). All ids that are associated to the event: ak16874254. Unique identifier: ak16874254. The temblor was picked up at 13:39:00 / 1:39 pm (local time epicenter). Global time and date of event 21/09/17 / 2017-09-21 01:39:00 / September 21, 2017 @ 1:39 am UTC/GMT. The epicenter was at a depth of 12.7 km (8 miles). Exact location of earthquake, longitude 178.4229 East, latitude 51.2011 North, depth = 12.7 km.

There are an estimated 130,000 minor earthquakes in the world each year. Earthquakes 2.5 to 3.5 are often felt, but only causes minor damage. In the past 24 hours, there have been one, in the last 10 days seven, in the past 30 days twelve and in the last 365 days one hundred and sixty-seven earthquakes of magnitude 3.0 or greater that was reported nearby.

Did you feel anything?

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. 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: 83 km S of Little Sitkin Island, Alaska.

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More information

Parameter Value Description
Magnitude 3.1 mb The magnitude for the event.
Longitude 178.4229° East Decimal degrees longitude. Negative values for western longitudes.
Latitude 51.2011° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 12.7 km Depth of the event in kilometers.
Place 83km S of Little Sitkin Island, Alaska Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2017-09-21 01:39:00 Time when the event occurred. UTC/GMT
Updated 2017-09-26 17:50:50 Time when the event was most recently updated. UTC/GMT
Timezone offset 720 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 0.69 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 ak16874254 Id of event.
Event Code 16874254 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,ak16874254, A comma-separated list of event ids that are associated to an event.

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