Light earthquake: M4 quake has struck near Atka in Alaska

A light earthquake magnitude 4 (ml/mb) has struck on Saturday, 72 km WNW of Atka, Alaska (45 miles). Global time and date of event 13/09/25 / 2025-09-13 03:30:42 / September 13, 2025 @ 3:30 am UTC/GMT. Unique identifier: us7000qvwa. Ids that are associated to the event: us7000qvwa. The earthquake was roughly at a depth of 224.558 km (140 miles). The temblor was picked up at 03:30:42 / 3:30 am (local time epicenter). A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Exact location of event, longitude -175.2273 West, latitude 52.3506 North, depth = 224.558 km.

Every year there are an estimated 13,000 light earthquakes in the world. In the past 24 hours, there have been one, in the last 10 days two, in the past 30 days four and in the last 365 days one hundred and thirty-four earthquakes of magnitude 3.0 or greater that has occurred nearby. Earthquakes 4.0 to 5.0 are often felt, but only causes minor damage.

Did you feel the quake?

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. This information comes from the USGS Earthquake Notification Service. Read more about the earthquake, Seismometer information, Date-Time, Location, Distances, Parameters and details about this quake, recorded: 72 km WNW of Atka, Alaska.

Alaska Atka

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Parameter	Value	Description
Magnitude	4 mb	The magnitude for the event.
Longitude	-175.2273° West	Decimal degrees longitude. Negative values for western longitudes.
Latitude	52.3506° North	Decimal degrees latitude. Negative values for southern latitudes.
Depth	224.558 km	Depth of the event in kilometers.
Place	72 km WNW 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	2025-09-13 03:30:42	Time when the event occurred. UTC/GMT
Updated	2025-09-13 04:01:12	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	246	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	24	The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance	0.572	Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square	0.51 sec	The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap	149	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	us7000qvwa	Id of event.
Event Code	7000qvwa	An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS	,us7000qvwa,	A comma-separated list of event ids that are associated to an event.

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Light earthquake: M4 quake has struck near Atka in Alaska

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