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Minor earthquake, 3.1 mag strikes near Big Lake in Alaska

Posted by admin on December 4, 2018 0 Comments

Earthquake location 61.4679S, -150.0457WA minor earthquake with magnitude 3.1 (ml/mb) was detected on Tuesday, 7 kilometers (4 miles) from Big Lake in Alaska. The temblor was reported at 10:59:36 / 10:59 am (local time epicenter). Event ids that are associated to the earthquake: ak20442878. Id of event: ak20442878. Exact location of earthquake, -150.0457° West, 61.4679° North, depth 19.9 km. Exact time and date of event in UTC/GMT: 04/12/18 / 2018-12-04 19:59:36 / December 4, 2018 @ 7:59 pm. The earthquake occurred at a depth of 19.9 km (12 miles).

Epicenter of the event was 29 km (18 miles) from Anchorage (c. 291 800 pop), 30 km (19 miles) from Eagle River (c. 24 800 pop), 24 km (15 miles) from Knik-Fairview (c. 14 900 pop), 42 km (26 miles) from Lakes (c. 8 400 pop), 37 km (23 miles) from Tanaina (c. 8 200 pop). Nearest cities/city/towns to hypocenter/epicentrum was Palmer, Gateway, Lakes (min 5000 pop). Nearby country/countries that might be effected, United States (c. 310 233 000 pop).

In the past 24 hours, there have been fifteen, in the last 10 days two hundred and eleven, in the past 30 days two hundred and thirteen and in the last 365 days two hundred and seventy-four earthquakes of magnitude 3.0 or greater that has struck near. Earthquakes 2.5 to 3.5 are often felt, but only causes minor damage. Every year there are an estimated 130,000 minor earthquakes in the world.

Questions or comments?

Did objects rattle, topple over, or fall off shelves? Leave a comment or report about activity, shaking and damage at your home, country and city. 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: 7 km SW of Big Lake, Alaska.

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More information

Parameter Value Description
Magnitude 3.1 mb The magnitude for the event.
Longitude -150.0457° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 61.4679° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 19.9 km Depth of the event in kilometers.
Place 7km SW of Big Lake, Alaska Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2018-12-04 19:59:36 Time when the event occurred. UTC/GMT
Updated 2018-12-04 20:12:59 Time when the event was most recently updated. UTC/GMT
Timezone offset -540 Timezone offset from UTC in minutes at the event epicenter.
Felt 4 The total number of felt reports
CDI 2 The maximum reported intensity for the event.
MMI 2.22 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 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 149 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 ,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 0.87 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 ak20442878 Id of event.
Event Code 20442878 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,ak20442878, A comma-separated list of event ids that are associated to an event.

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