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Minor earthquake 2.8 mag, 6 km NW of Little Sitkin Island, Alaska



Earthquake location 51.9859S, 178.4311WA minor earthquake with magnitude 2.8 (ml/mb) was detected on Saturday, 6 km NW of Little Sitkin Island, Alaska (4 miles). The 2.8-magnitude earthquake was detected at 06:55:07 / 6:55 am (local time epicenter). Exact location of earthquake, longitude 178.4311 East, latitude 51.9859 North, depth = 40.5 km. Date and time of earthquake in UTC/GMT: 23/04/16 / 2016-04-23 15:55:07 / April 23, 2016 @ 3:55 pm. Id of earthquake: ak13491746. Event ids that are associated: ak13491746. The earthquake occurred at a depth of 40.5 km (25 miles) below the earth’s surface.

In the past 24 hours, there have been 0, in the last 10 days one, in the past 30 days seven and in the last 365 days one hundred and twenty-one earthquakes of magnitude 3.0 or greater that have been detected nearby. Earthquakes 2.5 to 2.9 are often felt, but only causes minor damage. There are an estimated 1,300,000 minor earthquakes in the world each year.

Did you feel it?

Did objects rattle, topple over, or fall off shelves? Leave a comment or report about activity, shaking and damage at your home, country and city. 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: 6 km NW of Little Sitkin Island, Alaska.

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More information

Parameter Value Description
Magnitude 2.8 mb The magnitude for the event.
Longitude 178.4311° East Decimal degrees longitude. Negative values for western longitudes.
Latitude 51.9859° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 40.5 km Depth of the event in kilometers.
Place 6km NW 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 2016-04-23 15:55:07 Time when the event occurred. UTC/GMT
Updated 2016-04-24 01:33:20 Time when the event was most recently updated. UTC/GMT
Timezone offset -540 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 121 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 0.67 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 ak13491746 Id of event.
Event Code 13491746 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,ak13491746, A comma-separated list of event ids that are associated to an event.

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