Light earthquake, 4 mag strikes near Atka in Alaska

A light earthquake magnitude 4 (ml/mb) has occurred on Sunday, 186 km E of Atka, Alaska (116 miles). The temblor was picked up at 12:05:36 / 12:05 pm (local time epicenter). The earthquake was roughly at a depth of 25.8 km (16 miles). Global date and time of event UTC/GMT: 09/11/25 / 2025-11-09 12:05:36 / November 9, 2025 @ 12:05 pm. Exact location, longitude -171.472° West, latitude 52.1887° North, depth = 25.8 km. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Event ids that are associated to the earthquake: ak025edudzb3. Id of event: ak025edudzb3.

In the past 24 hours, there have been four, in the last 10 days six, in the past 30 days seven and in the last 365 days one hundred and fourty earthquakes of magnitude 3.0 or greater that has struck near. There are an estimated 13,000 light quakes in the world each year. Earthquakes 4.0 to 5.0 are often felt, but only causes minor damage.

Did you feel anything?

What was your situation during the earthquake? Leave a comment or report about damage, shaking and activity at your home, city 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: 186 km E of Atka, Alaska.

Alaska Atka

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Parameter	Value	Description
Magnitude	4 mb	The magnitude for the event.
Longitude	-171.472° West	Decimal degrees longitude. Negative values for western longitudes.
Latitude	52.1887° North	Decimal degrees latitude. Negative values for southern latitudes.
Depth	25.8 km	Depth of the event in kilometers.
Place	186 km E of Atka, Alaska	Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time	2025-11-09 12:05:36	Time when the event occurred. UTC/GMT
Updated	2025-11-09 20:35:24	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	2.547	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	246	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	0.75 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	ak025edudzb3	Id of event.
Event Code	025edudzb3	An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS	,ak025edudzb3,	A comma-separated list of event ids that are associated to an event.

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Light earthquake, 4 mag strikes near Atka in Alaska

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