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Minor earthquake 3.9 mag, 40 km W of Port Lions, Alaska

Earthquake location 57.8201S, -153.5509WA minor earthquake with magnitude 3.9 (ml/mb) was detected on Monday, 40 kilometers (25 miles) from Port Lions in Alaska. Id of earthquake: ak020c6kgmit. Event ids that are associated: at00qh0v8i, ak020c6kgmit. Global time and date of event 21/09/20 / 2020-09-21 18:55:30 / September 21, 2020 @ 6:55 pm UTC/GMT. The 3.9-magnitude earthquake has occurred at 18:55:30 / 6:55 pm (local time epicenter). The earthquake occurred at a depth of 50.3 km (31 miles) below the earth’s surface. Exact location of event, depth 50.3 km, -153.5509° West, 57.8201° North.

Nearby country/countries, United States (c. 310 233 000 pop) (That might be effected). Event epicenter was 68 km (42 miles) from Kodiak (c. 6 100 pop). Closest city/cities/towns to epicentrum/hypocenter was Kodiak (min 5000 pop).

Earthquakes 3.0 to 4.0 are often felt, but only causes minor damage. There are an estimated 130,000 minor earthquakes in the world each year. In the past 24 hours, there have been one, in the last 10 days one, in the past 30 days three and in the last 365 days twenty-four earthquakes of magnitude 3.0 or greater that have been detected nearby.

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 information comes from the USGS Earthquake Notification Service. Read more about the earthquake, Seismometer information, Date-Time, Location, Distances, Parameters and details about this quake, recorded: 40 km W of Port Lions, Alaska.

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More information

Parameter Value Description
Magnitude 3.9 mb The magnitude for the event.
Longitude -153.5509° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 57.8201° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 50.3 km Depth of the event in kilometers.
Place 40 km W of Port Lions, Alaska Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2020-09-21 18:55:30 Time when the event occurred. UTC/GMT
Updated 2020-09-21 19:04:44 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 automatic 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 234 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 0.7 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 ak020c6kgmit Id of event.
Event Code 020c6kgmit An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,at00qh0v8i,ak020c6kgmit, A comma-separated list of event ids that are associated to an event.

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