Moderate earthquake, 5.6 mag was detected near Adak in Alaska

A moderate earthquake magnitude 5.6 (ml/mb) has struck on Friday, 85 km SSE of Adak, Alaska (53 miles). Exact location of event, longitude -176.0955 West, latitude 51.1808 North, depth = 28.7 km. Unique identifier: ak0253ojnad2. Ids that are associated to the event: at00sthapk, ak0253ojnad2. The 5.6-magnitude earthquake was detected at 14:53:43 / 2:53 pm (local time epicenter). Global time and date of event 21/03/25 / 2025-03-21 14:53:43 / March 21, 2025 @ 2:53 pm UTC/GMT. A tsunami warning has been issued near Adak in Alaska (Does not indicate if a tsunami actually did or will exist). The epicenter of the earthquake was roughly 28.7 km (18 miles) below the earth’s surface.

In the past 24 hours, there have been sixteen, in the last 10 days thirty-four, in the past 30 days thirty-eight and in the last 365 days three hundred and sixty earthquakes of magnitude 3.0 or greater that has struck near. Each year there are an estimated 1320 moderate quakes in the world. Earthquakes 5.0 to 6.0 may cause light damage to buildings and other structures.

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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. Read more about the earthquake, Distances, Seismometer information, Date-Time, Parameters, Location and details about this quake, that has struck: 85 km SSE of Adak, Alaska. This data comes from the USGS Earthquake Notification Service.

Adak Alaska

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Parameter	Value	Description
Magnitude	5.6 mb	The magnitude for the event.
Longitude	-176.0955° West	Decimal degrees longitude. Negative values for western longitudes.
Latitude	51.1808° North	Decimal degrees latitude. Negative values for southern latitudes.
Depth	28.7 km	Depth of the event in kilometers.
Place	85 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	2025-03-21 14:53:43	Time when the event occurred. UTC/GMT
Updated	2025-03-21 15:01:28	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	3.846	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	1	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	482	A number describing how significant the event is. Larger numbers indicate a more significant event.
Network	ak	The ID of a data contributor. Identifies the network considered to be the preferred source of information for this event.
Sources	,at,ak,	A comma-separated list of network contributors.
Number of Stations Used		The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance		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		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	ak0253ojnad2	Id of event.
Event Code	0253ojnad2	An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS	,at00sthapk,ak0253ojnad2,	A comma-separated list of event ids that are associated to an event.

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Moderate earthquake, 5.6 mag was detected near Adak in Alaska

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