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Minor earthquake 3.1 mag, 101 km S of Nikolski, Alaska


Earthquake location 52.0315S, -168.6816WA minor earthquake magnitude 3.1 (ml/mb) has struck on Wednesday, 101 km S of Nikolski, Alaska (63 miles). Event id: ak11675825. Ids that are associated to the earthquake: ak11675825. The epicenter was at a depth of 33.7 km (21 miles). The temblor was reported at 16:23:57 / 4:23 pm (local time epicenter). Global date and time of event UTC/GMT: 30/07/15 / 2015-07-30 03:23:57 / July 30, 2015 @ 3:23 am. Exact location of earthquake, -168.6816° West, 52.0315° North, depth 33.7 km.

In the past 24 hours, there have been fourty-eight, in the last 10 days one hundred and fifty-five, in the past 30 days one hundred and fifty-nine and in the last 365 days two hundred and thirty-six 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 earthquakes 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. 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: 101 km S of Nikolski, Alaska.

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More information

Parameter Value Description
Magnitude 3.1 mb The magnitude for the event.
Longitude -168.6816° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 52.0315° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 33.7 km Depth of the event in kilometers.
Place 101km S 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 2015-07-30 03:23:57 Time when the event occurred. UTC/GMT
Updated 2015-08-11 17:03:34 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 0.51 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 ak11675825 Id of event.
Event Code 11675825 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,ak11675825, A comma-separated list of event ids that are associated to an event.

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