Minor earthquake, 3.9 mag strikes near Nikolski in Alaska

A minor earthquake magnitude 3.9 (ml/mb) strikes 233 km SE of Nikolski, Alaska (145 miles) on Tuesday. Exact location of earthquake, longitude -166.0508 West, latitude 51.7363 North, depth = 55.01 km. Id of earthquake: us2000400b. Event ids that are associated: ak11755981, us2000400b. The 3.9-magnitude earthquake has occurred at 01:49:45 / 1:49 am (local time epicenter). The earthquake was roughly at a depth of 55.01 km (34 miles). Date and time of earthquake in UTC/GMT: 20/10/15 / 2015-10-20 12:49:45 / October 20, 2015 @ 12:49 pm.

In the past 24 hours, there have been one, in the last 10 days one, in the past 30 days one and in the last 365 days five earthquakes of magnitude 3.0 or greater that have been detected in the same area. Earthquakes 3.0 to 4.0 are often felt, but only causes minor damage. There are an estimated 130,000 minor earthquakes in the world each year.

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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. 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: 233 km SE of Nikolski, Alaska.

Alaska Nikolski

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Parameter	Value	Description
Magnitude	3.9 mb	The magnitude for the event.
Longitude	-166.0508° West	Decimal degrees longitude. Negative values for western longitudes.
Latitude	51.7363° North	Decimal degrees latitude. Negative values for southern latitudes.
Depth	55.01 km	Depth of the event in kilometers.
Place	233km SE 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	2015-10-20 12:49:45	Time when the event occurred. UTC/GMT
Updated	2015-11-19 11:06:44	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	234	A number describing how significant the event is. Larger numbers indicate a more significant event.
Network	us	The ID of a data contributor. Identifies the network considered to be the preferred source of information for this event.
Sources	,ak,us,	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	2.025	Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square	1.05 sec	The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap	214	The largest azimuthal gap between azimuthally adjacent stations (in degrees).
Magnitude Type	mb	The method or algorithm used to calculate the preferred magnitude for the event.
Event Type	earthquake	Type of seismic event.
Event ID	us2000400b	Id of event.
Event Code	2000400b	An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS	,ak11755981,us2000400b,	A comma-separated list of event ids that are associated to an event.

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Minor earthquake, 3.9 mag strikes near Nikolski in Alaska

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