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Moderate earthquake: M5.4 quake has struck near Nikolski in Alaska

Posted by admin on November 9, 2025 0 Comments

Earthquake location 51.708S, -171.159WA moderate earthquake magnitude 5.4 (ml/mb) has struck on Sunday, 208 km SW of Nikolski, Alaska (129 miles). Exact time and date of event in UTC/GMT: 09/11/25 / 2025-11-09 09:36:48 / November 9, 2025 @ 9:36 am. The earthquake occurred at a depth of 39 km (24 miles). The temblor was picked up at 09:36:48 / 9:36 am (local time epicenter). All ids that are associated to the event: at00t5gddc, ak025edssceq. Unique identifier: at00t5gddc. A tsunami warning has been issued near Nikolski in Alaska (Does not indicate if a tsunami actually did or will exist). Exact location of earthquake, -171.159° West, 51.708° North, depth 39 km.

Earthquakes 5.0 to 6.0 may cause light damage to buildings and other structures. In the past 24 hours, there have been one, in the last 10 days three, in the past 30 days four and in the last 365 days one hundred and twenty-two earthquakes of magnitude 3.0 or greater that was reported nearby. Each year there are an estimated 1320 moderate earthquakes in the world.

Did you feel anything?

What was your situation during the earthquake? Leave a comment or report about damage, shaking and activity at your home, city 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: 208 km SW of Nikolski, Alaska.

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More information

Parameter Value Description
Magnitude 5.4 mb The magnitude for the event.
Longitude -171.159° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 51.708° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 39 km Depth of the event in kilometers.
Place 208 km SW 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 2025-11-09 09:36:48 Time when the event occurred. UTC/GMT
Updated 2025-11-09 09:43:57 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 2.918 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 449 A number describing how significant the event is. Larger numbers indicate a more significant event.
Network at The ID of a data contributor. Identifies the network considered to be the preferred source of information for this event.
Sources ,at,ak, A comma-separated list of network contributors.
Number of Stations Used 62 The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance 1.895445 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 1.26 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 208.799983296 The largest azimuthal gap between azimuthally adjacent stations (in degrees).
Magnitude Type Mi The method or algorithm used to calculate the preferred magnitude for the event.
Event Type earthquake Type of seismic event.
Event ID at00t5gddc Id of event.
Event Code 00t5gddc An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,at00t5gddc,ak025edssceq, A comma-separated list of event ids that are associated to an event.

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