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Minor earthquake, 2.8 mag strikes near Nikolski in Alaska


Earthquake location 51.9642S, -169.3063WA minor earthquake magnitude 2.8 (ml/mb) has struck on Thursday, 112 km SSW of Nikolski, Alaska (70 miles). The temblor was picked up at 16:42:14 / 4:42 pm (local time epicenter). The epicenter was at a depth of 35.4 km (22 miles). Exact location of earthquake, longitude -169.3063 West, latitude 51.9642 North, depth = 35.4 km. Unique identifier: ak11686830. Ids that are associated to the event: ak11686830. Exact time and date of earthquake 21/08/15 / 2015-08-21 03:42:14 / August 21, 2015 @ 3:42 am UTC/GMT.

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

Did you feel it?

What was your situation during the earthquake? Leave a comment or report about damage, shaking and activity at your home, city and country. Read more about the earthquake, Distances, Seismometer information, Date-Time, Parameters, Location and details about this quake, that has struck: 112 km SSW of Nikolski, Alaska. This data comes from the USGS Earthquake Notification Service.

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More information

Parameter Value Description
Magnitude 2.8 mb The magnitude for the event.
Longitude -169.3063° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 51.9642° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 35.4 km Depth of the event in kilometers.
Place 112km SSW of Nikolski, Alaska Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2015-08-21 03:42:14 Time when the event occurred. UTC/GMT
Updated 2015-08-27 17:58:49 Time when the event was most recently updated. UTC/GMT
Timezone offset -660 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 10 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 0.68 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 233.99998128 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 ak11686830 Id of event.
Event Code 11686830 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,ak11686830, A comma-separated list of event ids that are associated to an event.

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