Light earthquake, 4 mag strikes near Adak in Alaska

A light earthquake with magnitude 4 (ml/mb) was reported 73 km SSE of Adak, Alaska (45 miles) on Wednesday. The epicenter was at a depth of 44.582 km (28 miles). The temblor was reported at 23:17:59 / 11:17 pm (local time epicenter). A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Global date and time of event UTC/GMT: 26/03/25 / 2025-03-26 23:17:59 / March 26, 2025 @ 11:17 pm. Unique identifier: us7000pmxc. Ids that are associated to the event: us7000pmxc, ak0253wyh8ji. Exact location, longitude -176.2383° West, latitude 51.2654° North, depth = 44.582 km.

In the past 24 hours, there have been one, in the last 10 days seventy-eight, in the past 30 days eighty-seven and in the last 365 days four hundred and twelve earthquakes of magnitude 3.0 or greater that have been detected in the same area. There are an estimated 13,000 light quakes in the world each year. Earthquakes 4.0 to 5.0 are often felt, but only causes minor damage.

Did you feel anything?

How did you react? Was there any damage to buildings? Leave a comment or report about shaking, activity 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: 73 km SSE of Adak, Alaska.

Adak Alaska

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Parameter	Value	Description
Magnitude	4 mb	The magnitude for the event.
Longitude	-176.2383° West	Decimal degrees longitude. Negative values for western longitudes.
Latitude	51.2654° North	Decimal degrees latitude. Negative values for southern latitudes.
Depth	44.582 km	Depth of the event in kilometers.
Place	73 km SSE 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	2025-03-26 23:17:59	Time when the event occurred. UTC/GMT
Updated	2025-03-26 23:32:06	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	2.439	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,ak,	A comma-separated list of network contributors.
Number of Stations Used	51	The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance	0.819	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	199	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	us7000pmxc	Id of event.
Event Code	7000pmxc	An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS	,us7000pmxc,ak0253wyh8ji,	A comma-separated list of event ids that are associated to an event.

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Light earthquake, 4 mag strikes near Adak in Alaska

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