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Moderate earthquake, 5 mag strikes near Chiniak in Alaska

Posted by admin on December 16, 2025 0 Comments

Earthquake location 56.4303S, -148.7794WA moderate earthquake with magnitude 5 (ml/mb) was reported 250 km ESE of Chiniak, Alaska (155 miles) on Tuesday. The temblor was detected at 23:35:25 / 11:35 pm (local time epicenter). Event id: us6000rvd3. Ids that are associated to the earthquake: at00t7dyv2, ak2025yslivi, us6000rvd3. The epicenter of the earthquake was roughly 8.657 km (5 miles) below the earth’s surface. Exact time and date of earthquake 16/12/25 / 2025-12-16 23:35:25 / December 16, 2025 @ 11:35 pm UTC/GMT. A tsunami warning has been issued near Chiniak in Alaska (Does not indicate if a tsunami actually did or will exist). Exact location of event, longitude -148.7794 West, latitude 56.4303 North, depth = 8.657 km.

In the past 24 hours, there have been two, in the last 10 days two, in the past 30 days ten and in the last 365 days fifty-two earthquakes of magnitude 3.0 or greater that has occurred nearby. Earthquakes 5.0 to 6.0 may cause light damage to buildings and other structures. Each year there are an estimated 1320 moderate quakes in the world.

How would you describe the shaking?

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. The information in this article comes from the USGS Earthquake Notification Service. Read more about the earthquake, Seismometer information, Distances, Parameters, Date-Time, Location and details about this quake, detected near: 250 km ESE of Chiniak, Alaska.

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More information

Parameter Value Description
Magnitude 5 mb The magnitude for the event.
Longitude -148.7794° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 56.4303° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 8.657 km Depth of the event in kilometers.
Place 250 km ESE of Chiniak, Alaska Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2025-12-16 23:35:25 Time when the event occurred. UTC/GMT
Updated 2025-12-16 23:49:08 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 1.655 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 385 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 ,at,ak,us, A comma-separated list of network contributors.
Number of Stations Used 31 The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance 2.479 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.63 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 140 The largest azimuthal gap between azimuthally adjacent stations (in degrees).
Magnitude Type mww The method or algorithm used to calculate the preferred magnitude for the event.
Event Type earthquake Type of seismic event.
Event ID us6000rvd3 Id of event.
Event Code 6000rvd3 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,at00t7dyv2,ak2025yslivi,us6000rvd3, A comma-separated list of event ids that are associated to an event.

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