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Minor earthquake 3.3 mag, 5 km NNW of Willow, Alaska


Earthquake location 61.7873S, -150.0833WA minor earthquake with magnitude 3.3 (ml/mb) was reported 5 kilometers (3 miles) from Willow in Alaska on Tuesday. Exact time and date of earthquake 20/05/25 / 2025-05-20 15:51:22 / May 20, 2025 @ 3:51 pm UTC/GMT. The 3.3-magnitude earthquake was detected at 15:51:22 / 3:51 pm (local time epicenter). Exact location of event, depth 30.124 km, -150.0833° West, 61.7873° North. Event id: us7000q0c9. Ids that are associated to the earthquake: us7000q0c9. The epicenter was at a depth of 30.124 km (19 miles).

Nearby country/countries that might be effected, United States (c. 310 233 000 pop). Closest city/cities/towns to epicentrum/hypocenter was Anchorage, Elmendorf Air Force Base, Eagle River (min 5000 pop). The epicenter was 64 km (40 miles) from Anchorage (c. 291 800 pop), 59 km (36 miles) from Eagle River (c. 24 800 pop), 40 km (25 miles) from Knik-Fairview (c. 14 900 pop), 45 km (28 miles) from Lakes (c. 8 400 pop), 39 km (24 miles) from Tanaina (c. 8 200 pop).

Earthquakes 2.5 to 3.5 are often felt, but only causes minor damage. In the past 24 hours, there have been one, in the last 10 days three, in the past 30 days six and in the last 365 days fifty-seven earthquakes of magnitude 3.0 or greater that have been detected in the same area. Every year there are an estimated 130,000 minor earthquakes in the world.

How would you describe the shaking?

Were you asleep? Was it difficult to stand and/or walk? Leave a comment or report about shaking, activity and damage at your city, home 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: 5 km NNW of Willow, Alaska.

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More information

Parameter Value Description
Magnitude 3.3 mb The magnitude for the event.
Longitude -150.0833° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 61.7873° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 30.124 km Depth of the event in kilometers.
Place 5 km NNW of Willow, Alaska Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2025-05-20 15:51:22 Time when the event occurred. UTC/GMT
Updated 2025-05-20 16:32:10 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 168 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 63 The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance 0.454 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.55 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 29 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 us7000q0c9 Id of event.
Event Code 7000q0c9 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us7000q0c9, A comma-separated list of event ids that are associated to an event.

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