Minor earthquake, 3.9 mag strikes near Adak in Alaska

A minor earthquake with magnitude 3.9 (ml/mb) was detected on Monday, 75 km SSE of Adak, Alaska (47 miles). The temblor was detected at 15:23:18 / 3:23 pm (local time epicenter). The earthquake occurred at a depth of 44.282 km (28 miles) below the earth’s surface. Global date and time of event UTC/GMT: 24/03/25 / 2025-03-24 15:23:18 / March 24, 2025 @ 3:23 pm. Exact location of earthquake, longitude -176.1366 West, latitude 51.2744 North, depth = 44.282 km. Event ids that are associated to the earthquake: ak0253tio9ux, us7000pm91. Id of event: us7000pm91.

In the past 24 hours, there have been two, in the last 10 days fifty-nine, in the past 30 days sixty-six and in the last 365 days three hundred and ninety-one earthquakes of magnitude 3.0 or greater that has occurred nearby. 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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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. Read more about the earthquake, Distances, Seismometer information, Date-Time, Parameters, Location and details about this quake, that has struck: 75 km SSE of Adak, Alaska. This data comes from the USGS Earthquake Notification Service.

Adak Alaska

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Parameter	Value	Description
Magnitude	3.9 mb	The magnitude for the event.
Longitude	-176.1366° West	Decimal degrees longitude. Negative values for western longitudes.
Latitude	51.2744° North	Decimal degrees latitude. Negative values for southern latitudes.
Depth	44.282 km	Depth of the event in kilometers.
Place	75 km SSE 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	2025-03-24 15:23:18	Time when the event occurred. UTC/GMT
Updated	2025-03-24 16:51:17	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	1.543	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	69	The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance	0.612	Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square	0.89 sec	The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap	197	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	us7000pm91	Id of event.
Event Code	7000pm91	An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS	,ak0253tio9ux,us7000pm91,	A comma-separated list of event ids that are associated to an event.

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Minor earthquake, 3.9 mag strikes near Adak in Alaska

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