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Light earthquake, 4.1457984015586 mag strikes near Chignik in Alaska

Posted by admin on December 7, 2025 0 Comments

Earthquake location 55.00373840332S, -156.39184570312WA light earthquake magnitude 4.1457984015586 (ml/mb) has occurred on Sunday, 191 km SE of Chignik, Alaska (119 miles). The temblor was reported at 12:22:54 / 12:22 pm (local time epicenter). Exact location, longitude -156.39184570312° West, latitude 55.00373840332° North, depth = 30.924453735352 km. Global time and date of event 07/12/25 / 2025-12-07 12:22:54 / December 7, 2025 @ 12:22 pm UTC/GMT. The earthquake occurred at a depth of 30.924453735352 km (19 miles). Event id: ak2025ybbntw. Ids that are associated to the earthquake: ak2025ybbntw. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist).

Every year there are an estimated 13,000 light earthquakes 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 one, in the last 10 days three, in the past 30 days five and in the last 365 days thirty-five earthquakes of magnitude 3.0 or greater that was reported nearby.

How would you describe the shaking?

How did you respond? Did any furniture slide, topple over, or become displaced? Leave a comment or report about activity, shaking and damage 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: 191 km SE of Chignik, Alaska.

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More information

Parameter Value Description
Magnitude 4.1457984015586 mb The magnitude for the event.
Longitude -156.39184570312° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 55.00373840332° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 30.924453735352 km Depth of the event in kilometers.
Place 191 km SE of Chignik, Alaska Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2025-12-07 12:22:54 Time when the event occurred. UTC/GMT
Updated 2025-12-07 12:25:13 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 264 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 38 The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance 1.7847517728806 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.65523726239146 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 231.6838760376 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 ak2025ybbntw Id of event.
Event Code 2025ybbntw An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,ak2025ybbntw, A comma-separated list of event ids that are associated to an event.

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