Moderate earthquake, 5.1 mag was detected near Nikolski in Alaska

A moderate earthquake magnitude 5.1 (ml/mb) has occurred on Thursday, 99 km SSW of Nikolski, Alaska (62 miles). The epicenter was at a depth of 71 km (44 miles). Exact location of earthquake, longitude -169.34 West, latitude 52.095 North, depth = 71 km. Unique identifier: at00t22vi3. Ids that are associated to the event: at00t22vi3, ak025bct27di. Exact time and date of event in UTC/GMT: 04/09/25 / 2025-09-04 19:01:15 / September 4, 2025 @ 7:01 pm. The temblor was picked up at 19:01:15 / 7:01 pm (local time epicenter). A tsunami warning has been issued near Nikolski in Alaska (Does not indicate if a tsunami actually did or will exist).

In the past 24 hours, there have been seven, in the last 10 days nine, in the past 30 days thirteen and in the last 365 days one hundred and seventy-eight earthquakes of magnitude 3.0 or greater that was reported nearby. Earthquakes 5.0 to 6.0 may cause light damage to buildings and other structures. Each year there are an estimated 1320 moderate earthquakes in the world.

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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. 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: 99 km SSW of Nikolski, Alaska.

Alaska Nikolski

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Parameter	Value	Description
Magnitude	5.1 mb	The magnitude for the event.
Longitude	-169.34° West	Decimal degrees longitude. Negative values for western longitudes.
Latitude	52.095° North	Decimal degrees latitude. Negative values for southern latitudes.
Depth	71 km	Depth of the event in kilometers.
Place	99 km 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	2025-09-04 19:01:15	Time when the event occurred. UTC/GMT
Updated	2025-09-04 19:12:29	Time when the event was most recently updated. UTC/GMT
Timezone offset		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	2.921	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	1	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	400	A number describing how significant the event is. Larger numbers indicate a more significant event.
Network	at	The ID of a data contributor. Identifies the network considered to be the preferred source of information for this event.
Sources	,at,ak,	A comma-separated list of network contributors.
Number of Stations Used	55	The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance	0	Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square	1.74 sec	The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap	205.199983584	The largest azimuthal gap between azimuthally adjacent stations (in degrees).
Magnitude Type	Mi	The method or algorithm used to calculate the preferred magnitude for the event.
Event Type	earthquake	Type of seismic event.
Event ID	at00t22vi3	Id of event.
Event Code	00t22vi3	An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS	,at00t22vi3,ak025bct27di,	A comma-separated list of event ids that are associated to an event.

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Moderate earthquake, 5.1 mag was detected near Nikolski in Alaska

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