Minor earthquake, 3.9 mag was detected near Adak in Alaska

A minor earthquake magnitude 3.9 (ml/mb) has struck on Monday, 101 km SW of Adak, Alaska (63 miles). Id of earthquake: us7000rewa. Event ids that are associated: ak2025xpxkax, us7000rewa. The epicenter of the earthquake was roughly 43.251 km (27 miles) below the earth’s surface. The temblor was reported at 10:29:05 / 10:29 am (local time epicenter). Global time and date of event 01/12/25 / 2025-12-01 10:29:05 / December 1, 2025 @ 10:29 am UTC/GMT. Exact location of event, longitude -177.5972 West, latitude 51.1848 North, depth = 43.251 km.

Earthquakes 3.0 to 4.0 are often felt, but only causes minor damage. In the past 24 hours, there have been two, in the last 10 days ten, in the past 30 days sixteen and in the last 365 days five hundred and thirty-nine earthquakes of magnitude 3.0 or greater that was reported nearby. Each year there are an estimated 130,000 minor quakes in the world.

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How did you react? Was there any damage to buildings? Leave a comment or report about shaking, activity and damage at your home, city 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: 101 km SW of Adak, Alaska.

Adak Alaska

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Parameter	Value	Description
Magnitude	3.9 mb	The magnitude for the event.
Longitude	-177.5972° West	Decimal degrees longitude. Negative values for western longitudes.
Latitude	51.1848° North	Decimal degrees latitude. Negative values for southern latitudes.
Depth	43.251 km	Depth of the event in kilometers.
Place	101 km SW of Adak, Alaska	Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time	2025-12-01 10:29:05	Time when the event occurred. UTC/GMT
Updated	2025-12-03 09:55:19	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		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	36	The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance	0.602	Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square	0.76 sec	The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap	228	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	us7000rewa	Id of event.
Event Code	7000rewa	An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS	,ak2025xpxkax,us7000rewa,	A comma-separated list of event ids that are associated to an event.

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Minor earthquake, 3.9 mag was detected near Adak in Alaska

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