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Light earthquake: M4.3 quake has struck near Adak in Alaska

Posted by admin on July 3, 2025 0 Comments

Earthquake location 51.5113S, -179.5383WA light earthquake with magnitude 4.3 (ml/mb) was detected on Thursday, 204 km WSW of Adak, Alaska (127 miles). The temblor was picked up at 04:46:23 / 4:46 am (local time epicenter). Date and time of earthquake in UTC/GMT: 03/07/25 / 2025-07-03 04:46:23 / July 3, 2025 @ 4:46 am. Exact location of event, longitude -179.5383 West, latitude 51.5113 North, depth = 63.661 km. Event id: us7000qacu. Ids that are associated to the earthquake: us7000qacu, ak0258gdjhuw. The epicenter of the earthquake was roughly 63.661 km (40 miles) below the earth’s surface. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist).

Earthquakes 4.0 to 5.0 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 four and in the last 365 days one hundred and fifteen earthquakes of magnitude 3.0 or greater that have been detected in the same area. There are an estimated 13,000 light earthquakes in the world each year.

Did you feel the quake?

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. 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: 204 km WSW of Adak, Alaska.

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More information

Parameter Value Description
Magnitude 4.3 mb The magnitude for the event.
Longitude -179.5383° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 51.5113° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 63.661 km Depth of the event in kilometers.
Place 204 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 2025-07-03 04:46:23 Time when the event occurred. UTC/GMT
Updated 2025-07-03 05:01:34 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 1 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 284 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 65 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 1.16 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 175 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 us7000qacu Id of event.
Event Code 7000qacu An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us7000qacu,ak0258gdjhuw, A comma-separated list of event ids that are associated to an event.

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