Minor earthquake, 3.9 mag was detected near Adak in Alaska

A minor earthquake magnitude 3.9 (ml/mb) has struck on Friday, 155 km WNW of Adak, Alaska (96 miles). The temblor was reported at 04:37:13 / 4:37 am (local time epicenter). Event id: us6000pxg4. Ids that are associated to the earthquake: us6000pxg4. Exact location of earthquake, longitude -178.7749 West, latitude 52.3422 North, depth = 239.217 km. The epicenter was at a depth of 239.217 km (149 miles). Exact time and date of event in UTC/GMT: 28/02/25 / 2025-02-28 04:37:13 / February 28, 2025 @ 4:37 am.

In the past 24 hours, there have been one, in the last 10 days one, in the past 30 days six and in the last 365 days fourty-one earthquakes of magnitude 3.0 or greater that was reported 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. The information in this article comes from the USGS Earthquake Notification Service. Read more about the earthquake, Seismometer information, Distances, Parameters, Date-Time, Location and details about this quake, detected near: 155 km WNW of Adak, Alaska.

Adak Alaska

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Parameter	Value	Description
Magnitude	3.9 mb	The magnitude for the event.
Longitude	-178.7749° West	Decimal degrees longitude. Negative values for western longitudes.
Latitude	52.3422° North	Decimal degrees latitude. Negative values for southern latitudes.
Depth	239.217 km	Depth of the event in kilometers.
Place	155 km WNW 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	2025-02-28 04:37:13	Time when the event occurred. UTC/GMT
Updated	2025-03-08 01:24:56	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	,us,	A comma-separated list of network contributors.
Number of Stations Used	40	The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance	0.561	Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square	0.71 sec	The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap	123	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	us6000pxg4	Id of event.
Event Code	6000pxg4	An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS	,us6000pxg4,	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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