Moderate earthquake: M5 quake has struck near Nikolski in Alaska

A moderate earthquake magnitude 5 (ml/mb) strikes 124 km S of Nikolski, Alaska (77 miles) on Thursday. A tsunami warning has been issued near Nikolski in Alaska (Does not indicate if a tsunami actually did or will exist). The earthquake occurred at a depth of 34 km (21 miles). Id of earthquake: at00t22xyp. Event ids that are associated: at00t22xyp, ak025bctdldp. Exact time and date of earthquake 04/09/25 / 2025-09-04 19:54:25 / September 4, 2025 @ 7:54 pm UTC/GMT. The 5-magnitude earthquake was detected at 19:54:25 / 7:54 pm (local time epicenter). Exact location of earthquake, longitude -169.0089 West, latitude 51.827 North, depth = 34 km.

In the past 24 hours, there have been nine, in the last 10 days eleven, in the past 30 days fifteen and in the last 365 days one hundred and thirty-six 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. There are an estimated 1320 moderate earthquakes in the world each year.

How would you describe the shaking?

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 information comes from the USGS Earthquake Notification Service. Read more about the earthquake, Seismometer information, Date-Time, Location, Distances, Parameters and details about this quake, recorded: 124 km S of Nikolski, Alaska.

Alaska Nikolski

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Parameter	Value	Description
Magnitude	5 mb	The magnitude for the event.
Longitude	-169.0089° West	Decimal degrees longitude. Negative values for western longitudes.
Latitude	51.827° North	Decimal degrees latitude. Negative values for southern latitudes.
Depth	34 km	Depth of the event in kilometers.
Place	124 km 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	2025-09-04 19:54:25	Time when the event occurred. UTC/GMT
Updated	2025-09-04 20:01:21	Time when the event was most recently updated. UTC/GMT
Timezone offset		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	2.933	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	385	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	44	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	1.7 sec	The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap	215.99998272	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	at00t22xyp	Id of event.
Event Code	00t22xyp	An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS	,at00t22xyp,ak025bctdldp,	A comma-separated list of event ids that are associated to an event.

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Moderate earthquake: M5 quake has struck near Nikolski in Alaska

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