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Moderate earthquake 5.5 mag, 263 km W of Adak, Alaska

Posted by admin on August 29, 2025 0 Comments

Earthquake location 51.6164S, 179.5793WA moderate earthquake magnitude 5.5 (ml/mb) has occurred on Friday, 263 km W of Adak, Alaska (163 miles). Date and time of earthquake in UTC/GMT: 29/08/25 / 2025-08-29 09:14:24 / August 29, 2025 @ 9:14 am. The earthquake occurred at a depth of 77.8 km (48 miles). The 5.5-magnitude earthquake was detected at 09:14:24 / 9:14 am (local time epicenter). A tsunami warning has been issued near Adak in Alaska (Does not indicate if a tsunami actually did or will exist). Exact location, longitude 179.5793° East, latitude 51.6164° North, depth = 77.8 km. Event id: ak025b2pylgm. Ids that are associated to the earthquake: at00t1r0c2, ak025b2pylgm.

In the past 24 hours, there have been four, in the last 10 days five, in the past 30 days five and in the last 365 days one hundred and three earthquakes of magnitude 3.0 or greater that has struck near. There are an estimated 1320 moderate earthquakes in the world each year. Earthquakes 5.0 to 6.0 may cause light damage to buildings and other structures.

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What was your situation during the earthquake? Leave a comment or report about damage, shaking and activity 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: 263 km W of Adak, Alaska.

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More information

Parameter Value Description
Magnitude 5.5 mb The magnitude for the event.
Longitude 179.5793° East Decimal degrees longitude. Negative values for western longitudes.
Latitude 51.6164° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 77.8 km Depth of the event in kilometers.
Place 263 km W 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 2025-08-29 09:14:24 Time when the event occurred. UTC/GMT
Updated 2025-08-29 09:25:21 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 465 A number describing how significant the event is. Larger numbers indicate a more significant event.
Network ak 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 The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.84 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 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 ak025b2pylgm Id of event.
Event Code 025b2pylgm An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,at00t1r0c2,ak025b2pylgm, A comma-separated list of event ids that are associated to an event.

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