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Light earthquake 4.2 mag, 143 km WSW of Adak, Alaska

Posted by admin on November 28, 2025 0 Comments

Earthquake location 51.3723S, -178.5377WA light earthquake with magnitude 4.2 (ml/mb) was detected on Friday, 143 km WSW of Adak, Alaska (89 miles). The temblor was detected at 04:32:52 / 4:32 am (local time epicenter). Exact location of earthquake, longitude -178.5377 West, latitude 51.3723 North, depth = 54.061 km. Global time and date of event 28/11/25 / 2025-11-28 04:32:52 / November 28, 2025 @ 4:32 am UTC/GMT. Unique identifier: us7000rea4. Ids that are associated to the event: us7000rea4. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). The epicenter of the earthquake was roughly 54.061 km (34 miles) below the earth’s surface.

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 six, in the past 30 days eight and in the last 365 days three hundred and sixty-eight earthquakes of magnitude 3.0 or greater that was reported nearby. Earthquakes 4.0 to 5.0 are often felt, but only causes minor damage.

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 data comes from the USGS Earthquake Notification Service. Read more about the earthquake, Seismometer information, Distances, Parameters, Date-Time, Location and details about this quake, that has occurred near: 143 km WSW of Adak, Alaska.

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More information

Parameter Value Description
Magnitude 4.2 mb The magnitude for the event.
Longitude -178.5377° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 51.3723° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 54.061 km Depth of the event in kilometers.
Place 143 km WSW of Adak, Alaska Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2025-11-28 04:32:52 Time when the event occurred. UTC/GMT
Updated 2025-11-28 04:45:37 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 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 271 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, 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 0.25 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 1.02 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 185 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 us7000rea4 Id of event.
Event Code 7000rea4 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us7000rea4, A comma-separated list of event ids that are associated to an event.

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