Moderate earthquake: M5 quake has struck near Adak in Alaska

A moderate earthquake with magnitude 5 (ml/mb) was detected on Monday, 71 km SSW of Adak, Alaska (44 miles). Global time and date of event 20/10/25 / 2025-10-20 18:45:26 / October 20, 2025 @ 6:45 pm UTC/GMT. The temblor was detected at 18:45:26 / 6:45 pm (local time epicenter). The earthquake occurred at a depth of 35 km (22 miles). Event id: us6000ric9. Ids that are associated to the earthquake: us6000ric9, ak025dgvg6v5. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Exact location of event, depth 35 km, -176.9961° West, 51.276° North.

In the past 24 hours, there have been one, in the last 10 days one, in the past 30 days nine and in the last 365 days five hundred and fifty-four earthquakes of magnitude 3.0 or greater that have been detected nearby. There are an estimated 1320 moderate quakes in the world each year. Earthquakes 5.0 to 6.0 may cause light damage to buildings and other structures.

Did you feel it?

Were you asleep? Was it difficult to stand and/or walk? Leave a comment or report about shaking, activity and damage at your city, home 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: 71 km SSW of Adak, Alaska.

Adak Alaska

More information

Parameter	Value	Description
Magnitude	5 mb	The magnitude for the event.
Longitude	-176.9961° West	Decimal degrees longitude. Negative values for western longitudes.
Latitude	51.276° North	Decimal degrees latitude. Negative values for southern latitudes.
Depth	35 km	Depth of the event in kilometers.
Place	71 km SSW of Adak, Alaska	Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time	2025-10-20 18:45:26	Time when the event occurred. UTC/GMT
Updated	2025-10-20 19:06:59	Time when the event was most recently updated. UTC/GMT
Timezone offset		Timezone offset from UTC in minutes at the event epicenter.
Felt	1	The total number of felt reports
CDI	2.7	The maximum reported intensity for the event.
MMI	3.323	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	385	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	58	The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance	0.586	Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square	1.11 sec	The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap	170	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	us6000ric9	Id of event.
Event Code	6000ric9	An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS	,us6000ric9,ak025dgvg6v5,	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

Moderate earthquake: M5 quake has struck near Adak in Alaska

Did you feel it?

More information

Leave a ReplyCancel reply

Follow us!

Tsunami videos

Categories

Information