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Light earthquake: M4.3 quake has struck near Nikolski in Alaska

Posted by admin on October 30, 2025 0 Comments

Earthquake location 51.4009S, -169.0993WA light earthquake magnitude 4.3 (ml/mb) strikes 171 km S of Nikolski, Alaska (106 miles) on Wednesday. The earthquake occurred at a depth of 10 km (6 miles). A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). The 4.3-magnitude earthquake was detected at 23:44:50 / 11:44 pm (local time epicenter). Exact location of earthquake, longitude -169.0993 West, latitude 51.4009 North, depth = 10 km. Exact time and date of event in UTC/GMT: 29/10/25 / 2025-10-29 23:44:50 / October 29, 2025 @ 11:44 pm. Id of earthquake: us6000rkap. Event ids that are associated: us6000rkap, ak025dvu9bo7.

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

Did you feel the quake?

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. Read more about the earthquake, Location, Distances, Seismometer information, Date-Time, Parameters and details about this quake, reported near: 171 km S of Nikolski, Alaska. This information comes from the USGS Earthquake Notification Service.

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More information

Parameter Value Description
Magnitude 4.3 mb The magnitude for the event.
Longitude -169.0993° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 51.4009° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 10 km Depth of the event in kilometers.
Place 171 km S of Nikolski, Alaska Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2025-10-29 23:44:50 Time when the event occurred. UTC/GMT
Updated 2025-10-30 00:23:31 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 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 284 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,ak, 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 1.581 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 1.18 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 186 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 us6000rkap Id of event.
Event Code 6000rkap An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us6000rkap,ak025dvu9bo7, A comma-separated list of event ids that are associated to an event.

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