Light earthquake 4.2 mag, 223 km SSE of False Pass, Alaska

A light earthquake with magnitude 4.2 (ml/mb) was reported 223 km SSE of False Pass, Alaska (139 miles) on Friday. The 4.2-magnitude earthquake has occurred at 02:58:15 / 2:58 am (local time epicenter). The epicenter of the earthquake was roughly 10 km (6 miles) below the earth’s surface. Unique identifier: us7000qx6u. Ids that are associated to the event: ak025c1cc99t, us7000qx6u. Exact location of earthquake, longitude -161.8968 West, latitude 53.0581 North, depth = 10 km. Global time and date of event 19/09/25 / 2025-09-19 02:58:15 / September 19, 2025 @ 2:58 am UTC/GMT. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist).

Each year there are an estimated 13,000 light quakes in the world. Earthquakes 4.0 to 5.0 are often felt, but only causes minor damage. In the past 24 hours, there have been two, in the last 10 days two, in the past 30 days two and in the last 365 days fourty-three earthquakes of magnitude 3.0 or greater that was reported nearby.

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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: 223 km SSE of False Pass, Alaska. This data comes from the USGS Earthquake Notification Service.

Alaska False Pass

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Parameter	Value	Description
Magnitude	4.2 mb	The magnitude for the event.
Longitude	-161.8968° West	Decimal degrees longitude. Negative values for western longitudes.
Latitude	53.0581° North	Decimal degrees latitude. Negative values for southern latitudes.
Depth	10 km	Depth of the event in kilometers.
Place	223 km SSE of False Pass, Alaska	Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time	2025-09-19 02:58:15	Time when the event occurred. UTC/GMT
Updated	2025-09-19 05:31:35	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	1	The maximum reported intensity for the event.
MMI	1.194	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	271	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	,ak,us,	A comma-separated list of network contributors.
Number of Stations Used	43	The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance	1.929	Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square	0.73 sec	The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap	181	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	us7000qx6u	Id of event.
Event Code	7000qx6u	An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS	,ak025c1cc99t,us7000qx6u,	A comma-separated list of event ids that are associated to an event.

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Light earthquake 4.2 mag, 223 km SSE of False Pass, Alaska

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