Minor earthquake 3.5 mag, 135 km SE of Old Harbor, Alaska

A minor earthquake with magnitude 3.5 (ml/mb) was detected on Monday, 135 km SE of Old Harbor, Alaska (84 miles). Global time and date of event 01/09/25 / 2025-09-01 11:20:54 / September 1, 2025 @ 11:20 am UTC/GMT. All ids that are associated to the event: us7000qt07. Unique identifier: us7000qt07. Exact location of event, longitude -151.9939 West, latitude 56.2197 North, depth = 10 km. The temblor was detected at 11:20:54 / 11:20 am (local time epicenter). The epicenter was at a depth of 10 km (6 miles).

Earthquakes 3.0 to 4.0 are often felt, but only causes minor damage. Every year there are an estimated 130,000 minor earthquakes in the world. In the past 24 hours, there have been thirty-one, in the last 10 days thirty-one, in the past 30 days thirty-one and in the last 365 days thirty-eight earthquakes of magnitude 3.0 or greater that has occurred nearby.

Questions or comments?

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: 135 km SE of Old Harbor, Alaska.

Alaska Old Harbor

More information

Parameter	Value	Description
Magnitude	3.5 mb	The magnitude for the event.
Longitude	-151.9939° West	Decimal degrees longitude. Negative values for western longitudes.
Latitude	56.2197° North	Decimal degrees latitude. Negative values for southern latitudes.
Depth	10 km	Depth of the event in kilometers.
Place	135 km SE of Old Harbor, Alaska	Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time	2025-09-01 11:20:54	Time when the event occurred. UTC/GMT
Updated	2025-09-30 11:39:40	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	,us,	A comma-separated list of network contributors.
Number of Stations Used	40	The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance	1.265	Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square	1.1 sec	The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap	210	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	us7000qt07	Id of event.
Event Code	7000qt07	An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS	,us7000qt07,	A comma-separated list of event ids that are associated to an event.

Earthquakes today

Current and latest world earthquakes breaking news, activity and articles today

Minor earthquake 3.5 mag, 135 km SE of Old Harbor, Alaska

Questions or comments?

More information

Leave a ReplyCancel reply

Follow us!

Tsunami videos

Categories

Information