Minor earthquake, 3.9 mag has occurred near Rat Islands, Aleutian Islands, Alaska

A minor earthquake with magnitude 3.9 (ml/mb) was reported Rat Islands, Aleutian Islands, Alaska (0 miles) on Friday. The epicenter was at a depth of 51.715 km (32 miles). Exact location of earthquake, longitude 177.5613 East, latitude 51.5015 North, depth = 51.715 km. Global date and time of event UTC/GMT: 05/09/25 / 2025-09-05 11:50:56 / September 5, 2025 @ 11:50 am. Id of earthquake: us6000rdlc. Event ids that are associated: us6000rdlc. The 3.9-magnitude earthquake has occurred at 11:50:56 / 11:50 am (local time epicenter).

Each year there are an estimated 130,000 minor earthquakes in the world. 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 ninety-seven earthquakes of magnitude 3.0 or greater that has occurred nearby. Earthquakes 3.0 to 4.0 are often felt, but only causes minor damage.

Did you feel it?

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 data comes from the USGS Earthquake Notification Service. Read more about the earthquake, Seismometer information, Distances, Parameters, Date-Time, Location and details about this quake, that has occurred near: Rat Islands, Aleutian Islands, Alaska.

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Parameter	Value	Description
Magnitude	3.9 mb	The magnitude for the event.
Longitude	177.5613° East	Decimal degrees longitude. Negative values for western longitudes.
Latitude	51.5015° North	Decimal degrees latitude. Negative values for southern latitudes.
Depth	51.715 km	Depth of the event in kilometers.
Place	Rat Islands, Aleutian Islands, Alaska	Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time	2025-09-05 11:50:56	Time when the event occurred. UTC/GMT
Updated	2025-10-05 10:05:54	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	23	The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance	0.775	Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square	0.82 sec	The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap	205	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	us6000rdlc	Id of event.
Event Code	6000rdlc	An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS	,us6000rdlc,	A comma-separated list of event ids that are associated to an event.

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Minor earthquake, 3.9 mag has occurred near Rat Islands, Aleutian Islands, Alaska

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