Minor earthquake, 3.5 mag has occurred near Chiniak in Alaska

A minor earthquake magnitude 3.5 (ml/mb) has occurred on Thursday, 229 km SE of Chiniak, Alaska (142 miles). The temblor was reported at 13:29:46 / 1:29 pm (local time epicenter). The epicenter of the earthquake was roughly 20.868 km (13 miles) below the earth’s surface. Global time and date of event 23/10/25 / 2025-10-23 13:29:46 / October 23, 2025 @ 1:29 pm UTC/GMT. Exact location of earthquake, -149.4181° West, 56.2755° North, depth 20.868 km. All ids that are associated to the event: us6000rivf, ak025dlqzt0a. Unique identifier: us6000rivf.

In the past 24 hours, there have been one, in the last 10 days two, in the past 30 days two and in the last 365 days fifty-four earthquakes of magnitude 3.0 or greater that have been detected in the same area. There are an estimated 130,000 minor earthquakes in the world each year. Earthquakes 3.0 to 4.0 are often felt, but only causes minor damage.

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How did you respond? Did any furniture slide, topple over, or become displaced? Leave a comment or report about activity, shaking and damage at your home, city and country. 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: 229 km SE of Chiniak, Alaska.

Alaska Chiniak

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Parameter	Value	Description
Magnitude	3.5 mb	The magnitude for the event.
Longitude	-149.4181° West	Decimal degrees longitude. Negative values for western longitudes.
Latitude	56.2755° North	Decimal degrees latitude. Negative values for southern latitudes.
Depth	20.868 km	Depth of the event in kilometers.
Place	229 km SE of Chiniak, Alaska	Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time	2025-10-23 13:29:46	Time when the event occurred. UTC/GMT
Updated	2025-10-24 12:54:01	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	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	,us,ak,	A comma-separated list of network contributors.
Number of Stations Used	41	The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance	2.297	Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square	0.61 sec	The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap	204	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	us6000rivf	Id of event.
Event Code	6000rivf	An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS	,us6000rivf,ak025dlqzt0a,	A comma-separated list of event ids that are associated to an event.

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Minor earthquake, 3.5 mag has occurred near Chiniak in Alaska

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