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Light earthquake, 4.1 mag strikes near Nikolski in Alaska

Posted by admin on April 20, 2025 0 Comments

Earthquake location 52.9939S, -170.5449WA light earthquake magnitude 4.1 (ml/mb) has occurred on Sunday, 113 km W of Nikolski, Alaska (70 miles). Global time and date of event 20/04/25 / 2025-04-20 08:59:04 / April 20, 2025 @ 8:59 am UTC/GMT. Id of earthquake: us6000q7d4. Event ids that are associated: us6000q7d4, ak0255228ax6. Exact location, longitude -170.5449° West, latitude 52.9939° North, depth = 131.605 km. The earthquake occurred at a depth of 131.605 km (82 miles) below the earth’s surface. The temblor was reported at 08:59:04 / 8:59 am (local time epicenter). 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. In the past 24 hours, there have been one, in the last 10 days two, in the past 30 days ten and in the last 365 days one hundred and nineteen earthquakes of magnitude 3.0 or greater that has occurred nearby. Earthquakes 4.0 to 5.0 are often felt, but only causes minor damage.

Did you feel anything?

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: 113 km W of Nikolski, Alaska.

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More information

Parameter Value Description
Magnitude 4.1 mb The magnitude for the event.
Longitude -170.5449° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 52.9939° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 131.605 km Depth of the event in kilometers.
Place 113 km W 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 2025-04-20 08:59:04 Time when the event occurred. UTC/GMT
Updated 2025-04-20 09:29:55 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 3.204 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 259 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 49 The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance 1.022 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.9 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 129 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 us6000q7d4 Id of event.
Event Code 6000q7d4 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us6000q7d4,ak0255228ax6, A comma-separated list of event ids that are associated to an event.

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