Minor earthquake, 3.5 mag was detected near Atka in Alaska

A minor earthquake with magnitude 3.5 (ml/mb) was detected on Saturday, 199 km SSE of Atka, Alaska (124 miles). The epicenter of the earthquake was roughly 10 km (6 miles) below the earth’s surface. Exact location of event, longitude -173.1071 West, latitude 50.542 North, depth = 10 km. The 3.5-magnitude earthquake has occurred at 16:29:31 / 4:29 pm (local time epicenter). All ids that are associated to the event: ak0258vgf8h0, us7000qcac. Unique identifier: us7000qcac. Global time and date of event 12/07/25 / 2025-07-12 16:29:31 / July 12, 2025 @ 4:29 pm UTC/GMT.

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 thirty-nine 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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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. Read more about the earthquake, Distances, Seismometer information, Date-Time, Parameters, Location and details about this quake, that has struck: 199 km SSE of Atka, Alaska. This data comes from the USGS Earthquake Notification Service.

Alaska Atka

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Parameter	Value	Description
Magnitude	3.5 mb	The magnitude for the event.
Longitude	-173.1071° West	Decimal degrees longitude. Negative values for western longitudes.
Latitude	50.542° North	Decimal degrees latitude. Negative values for southern latitudes.
Depth	10 km	Depth of the event in kilometers.
Place	199 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	2025-07-12 16:29:31	Time when the event occurred. UTC/GMT
Updated	2025-07-12 18:02:35	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	188	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	25	The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance	1.797	Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square	0.67 sec	The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap	225	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	us7000qcac	Id of event.
Event Code	7000qcac	An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS	,ak0258vgf8h0,us7000qcac,	A comma-separated list of event ids that are associated to an event.

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Minor earthquake, 3.5 mag was detected near Atka in Alaska

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