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Light World Earthquakes Magnitude 4-4.9

Light earthquake, 4.3 mag has occurred near Old Harbor in Alaska

Posted by admin on September 8, 2025 0 Comments

Earthquake location 56.2895S, -152.1007WA light earthquake with magnitude 4.3 (ml/mb) was detected on Monday, 125 km SE of Old Harbor, Alaska (78 miles). The epicenter of the earthquake was roughly 10 km (6 miles) below the earth’s surface. The temblor was reported at 19:18:55 / 7:18 pm (local time epicenter). Exact location of event, depth 10 km, -152.1007° West, 56.2895° North. Exact time and date of earthquake 01/09/25 / 2025-09-01 19:18:55 / September 1, 2025 @ 7:18 pm UTC/GMT. Unique identifier: us7000qt4d. Ids that are associated to the event: us7000qt4d. 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. Each year there are an estimated 13,000 light quakes in the world. In the past 24 hours, there have been twenty-one, in the last 10 days twenty-one, in the past 30 days twenty-one and in the last 365 days twenty-seven earthquakes of magnitude 3.0 or greater that has struck near.

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. Read more about the earthquake, Distances, Seismometer information, Date-Time, Parameters, Location and details about this quake, that has struck: 125 km SE of Old Harbor, Alaska. This data comes from the USGS Earthquake Notification Service.

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More information

Parameter Value Description
Magnitude 4.3 mb The magnitude for the event.
Longitude -152.1007° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 56.2895° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 10 km Depth of the event in kilometers.
Place 125 km SE of Old Harbor, Alaska Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2025-09-01 19:18:55 Time when the event occurred. UTC/GMT
Updated 2025-09-08 15:34:39 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 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, A comma-separated list of network contributors.
Number of Stations Used 108 The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance 1.141 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.9 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 144 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 us7000qt4d Id of event.
Event Code 7000qt4d An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us7000qt4d, A comma-separated list of event ids that are associated to an event.

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