Minor earthquake 3.8 mag, 175 km SSE of Atka, Alaska

A minor earthquake magnitude 3.8 (ml/mb) has occurred on Saturday, 175 km SSE of Atka, Alaska (109 miles). Exact time and date of event in UTC/GMT: 18/10/25 / 2025-10-18 14:08:25 / October 18, 2025 @ 2:08 pm. The temblor was detected at 14:08:25 / 2:08 pm (local time epicenter). The earthquake was roughly at a depth of 35 km (22 miles). Event id: us6000ri2i. Ids that are associated to the earthquake: ak025ddhrv76, us6000ri2i. Exact location, longitude -172.9633° West, latitude 50.8215° North, depth = 35 km.

Every year there are an estimated 130,000 minor earthquakes in the world. 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 two, in the past 30 days five and in the last 365 days sixty-five earthquakes of magnitude 3.0 or greater that have been detected nearby.

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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: 175 km SSE of Atka, Alaska.

Alaska Atka

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Parameter	Value	Description
Magnitude	3.8 mb	The magnitude for the event.
Longitude	-172.9633° West	Decimal degrees longitude. Negative values for western longitudes.
Latitude	50.8215° North	Decimal degrees latitude. Negative values for southern latitudes.
Depth	35 km	Depth of the event in kilometers.
Place	175 km SSE 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	2025-10-18 14:08:25	Time when the event occurred. UTC/GMT
Updated	2025-11-02 20:21:08	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	2.152	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	222	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	33	The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance	1.583	Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square	0.45 sec	The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap	221	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	us6000ri2i	Id of event.
Event Code	6000ri2i	An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS	,ak025ddhrv76,us6000ri2i,	A comma-separated list of event ids that are associated to an event.

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Minor earthquake 3.8 mag, 175 km SSE of Atka, Alaska

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