Moderate earthquake, 5.5 mag was detected near Adak in Alaska

A moderate earthquake magnitude 5.5 (ml/mb) strikes 84 km SSE of Adak, Alaska (52 miles) on Thursday. The 5.5-magnitude earthquake has occurred at 04:28:54 / 4:28 am (local time epicenter). 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 18 km (11 miles) below the earth’s surface. Exact time and date of event in UTC/GMT: 20/03/25 / 2025-03-20 04:28:54 / March 20, 2025 @ 4:28 am. Exact location of earthquake, longitude -176.214 West, latitude 51.164 North, depth = 18 km. Unique identifier: at00sten46. Ids that are associated to the event: at00sten46.

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

How would you describe the shaking?

What was your situation during the earthquake? Leave a comment or report about damage, shaking and activity 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: 84 km SSE of Adak, Alaska.

Adak Alaska

More information

Parameter	Value	Description
Magnitude	5.5 mb	The magnitude for the event.
Longitude	-176.214° West	Decimal degrees longitude. Negative values for western longitudes.
Latitude	51.164° North	Decimal degrees latitude. Negative values for southern latitudes.
Depth	18 km	Depth of the event in kilometers.
Place	84 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	2025-03-20 04:28:54	Time when the event occurred. UTC/GMT
Updated	2025-03-20 04:34:01	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	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	465	A number describing how significant the event is. Larger numbers indicate a more significant event.
Network	at	The ID of a data contributor. Identifies the network considered to be the preferred source of information for this event.
Sources	,at,	A comma-separated list of network contributors.
Number of Stations Used	29	The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance	0.8471113	Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square	0.88 sec	The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap	208.799983296	The largest azimuthal gap between azimuthally adjacent stations (in degrees).
Magnitude Type	Mi	The method or algorithm used to calculate the preferred magnitude for the event.
Event Type	earthquake	Type of seismic event.
Event ID	at00sten46	Id of event.
Event Code	00sten46	An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS	,at00sten46,	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, 5.5 mag was detected near Adak in Alaska

How would you describe the shaking?

More information

Leave a ReplyCancel reply

Follow us!

Tsunami videos

Categories

Information