Light earthquake 4 mag, 55 km SE of Adak, Alaska

A light earthquake magnitude 4 (ml/mb) has struck on Friday, 55 km SE of Adak, Alaska (34 miles). Date and time of earthquake in UTC/GMT: 28/02/25 / 2025-02-28 02:00:27 / February 28, 2025 @ 2:00 am. Exact location of event, depth 35 km, -176.0458° West, 51.5399° North. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). The temblor was picked up at 02:00:27 / 2:00 am (local time epicenter). Id of earthquake: us6000pvyk. Event ids that are associated: us6000pvyk. The epicenter of the earthquake was roughly 35 km (22 miles) below the earth’s surface.

Earthquakes 4.0 to 5.0 are often felt, but only causes minor damage. In the past 24 hours, there have been three, in the last 10 days three, in the past 30 days ten and in the last 365 days two hundred and two 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.

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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. Read more about the earthquake, Location, Distances, Seismometer information, Date-Time, Parameters and details about this quake, reported near: 55 km SE of Adak, Alaska. This information comes from the USGS Earthquake Notification Service.

Adak Alaska

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Parameter	Value	Description
Magnitude	4 mb	The magnitude for the event.
Longitude	-176.0458° West	Decimal degrees longitude. Negative values for western longitudes.
Latitude	51.5399° North	Decimal degrees latitude. Negative values for southern latitudes.
Depth	35 km	Depth of the event in kilometers.
Place	55 km SE 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	2025-02-28 02:00:27	Time when the event occurred. UTC/GMT
Updated	2025-02-28 02:15:42	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		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,	A comma-separated list of network contributors.
Number of Stations Used	28	The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance	0.555	Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square	1.2 sec	The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap	207	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	us6000pvyk	Id of event.
Event Code	6000pvyk	An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS	,us6000pvyk,	A comma-separated list of event ids that are associated to an event.

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Light earthquake 4 mag, 55 km SE of Adak, Alaska

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