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Moderate earthquake, 5 mag strikes near Atka in Alaska


Earthquake location 51.986S, -173.262WA moderate earthquake magnitude 5 (ml/mb) has occurred on Wednesday, 68 km ESE of Atka, Alaska (42 miles). The earthquake occurred at a depth of 32 km (20 miles) below the earth’s surface. Exact location of earthquake, -173.262° West, 51.986° North, depth 32 km. Unique identifier: at00szhx8g. Ids that are associated to the event: at00szhx8g. The temblor was reported at 14:21:52 / 2:21 pm (local time epicenter). Exact time and date of earthquake 16/07/25 / 2025-07-16 14:21:52 / July 16, 2025 @ 2:21 pm UTC/GMT. A tsunami warning has been issued near Atka in Alaska (Does not indicate if a tsunami actually did or will exist).

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 one, in the past 30 days fourteen and in the last 365 days one hundred and seventy-one earthquakes of magnitude 3.0 or greater that was reported nearby. Every year there are an estimated 1320 moderate earthquakes in the world.

Questions or comments?

Did objects rattle, topple over, or fall off shelves? Leave a comment or report about activity, shaking and damage at your home, country and city. 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: 68 km ESE of Atka, Alaska.

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More information

Parameter Value Description
Magnitude 5 mb The magnitude for the event.
Longitude -173.262° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 51.986° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 32 km Depth of the event in kilometers.
Place 68 km ESE of Atka, Alaska Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2025-07-16 14:21:52 Time when the event occurred. UTC/GMT
Updated 2025-07-16 14:26:30 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 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 at The ID of a data contributor. Identifies the network considered to be the preferred source of information for this event.
Sources ,at, A comma-separated list of network contributors.
Number of Stations Used 28 The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance 0.615346 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.5 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 197.99998416 The largest azimuthal gap between azimuthally adjacent stations (in degrees).
Magnitude Type Ml The method or algorithm used to calculate the preferred magnitude for the event.
Event Type earthquake Type of seismic event.
Event ID at00szhx8g Id of event.
Event Code 00szhx8g An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,at00szhx8g, A comma-separated list of event ids that are associated to an event.

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