Light earthquake, 4 mag has occurred near Halibut Cove in Alaska

A light earthquake magnitude 4 (ml/mb) has occurred on Wednesday, 43 kilometers (27 miles) from Halibut Cove in Alaska. Global date and time of event UTC/GMT: 16/07/25 / 2025-07-16 21:12:34 / July 16, 2025 @ 9:12 pm. Id of earthquake: ak025925g491. Event ids that are associated: ak025925g491. The earthquake occurred at a depth of 102.4 km (64 miles) below the earth’s surface. Exact location of earthquake, -150.9275° West, 59.2368° North, depth 102.4 km. The 4-magnitude earthquake was detected at 21:12:34 / 9:12 pm (local time epicenter). A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist).

Nearest cities/city/towns to hypocenter/epicentrum was Homer (min 5000 pop). Close country/countries, United States (c. 310 233 000 pop) (That might be effected). Earthquake epicenter was 57 km (36 miles) from Homer (c. 5 000 pop).

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

Questions or comments?

What was your situation during the earthquake? Leave a comment or report about damage, shaking and activity 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: 43 km SSE of Halibut Cove, Alaska. This data comes from the USGS Earthquake Notification Service.

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Parameter	Value	Description
Magnitude	4 mb	The magnitude for the event.
Longitude	-150.9275° West	Decimal degrees longitude. Negative values for western longitudes.
Latitude	59.2368° North	Decimal degrees latitude. Negative values for southern latitudes.
Depth	102.4 km	Depth of the event in kilometers.
Place	43 km SSE of Halibut Cove, Alaska	Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time	2025-07-16 21:12:34	Time when the event occurred. UTC/GMT
Updated	2025-07-16 21:16:16	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	automatic	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	ak	The ID of a data contributor. Identifies the network considered to be the preferred source of information for this event.
Sources	,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	1.03 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	ak025925g491	Id of event.
Event Code	025925g491	An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS	,ak025925g491,	A comma-separated list of event ids that are associated to an event.

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Light earthquake, 4 mag has occurred near Halibut Cove in Alaska

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