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Light earthquake: M4.4 quake has struck near Unalaska in Alaska

Posted by admin on May 11, 2025 0 Comments

Earthquake location 53.6949S, -166.9259WA light earthquake with magnitude 4.4 (ml/mb) was detected on Sunday, 32 km SW of Unalaska, Alaska (20 miles). The epicenter was at a depth of 77.13 km (48 miles). A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Event id: us7000pylz. Ids that are associated to the earthquake: us7000pylz, ak02560sxl16. The temblor was picked up at 09:29:01 / 9:29 am (local time epicenter). Exact location of event, longitude -166.9259 West, latitude 53.6949 North, depth = 77.13 km. Global date and time of event UTC/GMT: 11/05/25 / 2025-05-11 09:29:01 / May 11, 2025 @ 9:29 am.

In the past 24 hours, there have been one, in the last 10 days three, in the past 30 days nine and in the last 365 days ninety-four earthquakes of magnitude 3.0 or greater that have been detected in the same area. There are an estimated 13,000 light quakes in the world each year. Earthquakes 4.0 to 5.0 are often felt, but only causes minor damage.

Questions or comments?

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: 32 km SW of Unalaska, Alaska.

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More information

Parameter Value Description
Magnitude 4.4 mb The magnitude for the event.
Longitude -166.9259° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 53.6949° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 77.13 km Depth of the event in kilometers.
Place 32 km SW of Unalaska, Alaska Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2025-05-11 09:29:01 Time when the event occurred. UTC/GMT
Updated 2025-05-11 09:51:36 Time when the event was most recently updated. UTC/GMT
Timezone offset Timezone offset from UTC in minutes at the event epicenter.
Felt 9 The total number of felt reports
CDI 3.9 The maximum reported intensity for the event.
MMI 3.515 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 301 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 107 The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance 0.103 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.88 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 139 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 us7000pylz Id of event.
Event Code 7000pylz An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us7000pylz,ak02560sxl16, A comma-separated list of event ids that are associated to an event.

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