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Light earthquake, 4.5 mag has occurred near Big Lake in Alaska

Earthquake location 61.3977S, -150.0081WA light earthquake with magnitude 4.5 (ml/mb) was detected on Friday, 14 kilometers (9 miles) from Big Lake in Alaska. Event ids that are associated to the earthquake: at00pj1m15, us1000hz9c. Id of event: us1000hz9c. The epicenter of the earthquake was roughly 47.01 km (29 miles) below the earth’s surface. The 4.5-magnitude earthquake was detected at 20:31:53 / 8:31 pm (local time epicenter). Exact location of earthquake, longitude -150.0081 West, latitude 61.3977 North, depth = 47.01 km. Exact time and date of event in UTC/GMT: 01/12/18 / 2018-12-01 05:31:53 / December 1, 2018 @ 5:31 am. A tsunami warning has been issued near Big Lake in Alaska (Does not indicate if a tsunami actually did or will exist).

Closest city/cities or villages, with min 5000 pop, to hypocenter/epicentrum was Palmer, Gateway, Lakes. Epicenter of the earthquake was 21 km (13 miles) from Anchorage (c. 291 800 pop), 25 km (16 miles) from Eagle River (c. 24 800 pop), 25 km (16 miles) from Knik-Fairview (c. 14 900 pop), 44 km (27 miles) from Lakes (c. 8 400 pop), 40 km (25 miles) from Tanaina (c. 8 200 pop), 36 km (23 miles) from Wasilla (c. 7 800 pop), 33 km (21 miles) from Meadow Lakes (c. 7 600 pop). Country/countries that might be effected, United States (c. 310 233 000 pop).

Each year there are an estimated 13,000 light quakes in the world. In the past 24 hours, there have been one hundred and six, in the last 10 days one hundred and seven, in the past 30 days one hundred and eight and in the last 365 days one hundred and sixty-five earthquakes of magnitude 3.0 or greater that has struck near. Earthquakes 4.0 to 5.0 are often felt, but only causes minor damage.

How would you describe the shaking?

What was your situation during the earthquake? Leave a comment or report about damage, shaking and activity at your home, city and country. Read more about the earthquake, Location, Distances, Seismometer information, Date-Time, Parameters and details about this quake, reported near: 14 km SSW of Big Lake, Alaska. This information comes from the USGS Earthquake Notification Service.

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More information

Parameter Value Description
Magnitude 4.5 mb The magnitude for the event.
Longitude -150.0081° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 61.3977° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 47.01 km Depth of the event in kilometers.
Place 14km SSW 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 2018-12-01 05:31:53 Time when the event occurred. UTC/GMT
Updated 2018-12-01 05:49:14 Time when the event was most recently updated. UTC/GMT
Timezone offset -540 Timezone offset from UTC in minutes at the event epicenter.
Felt 75 The total number of felt reports
CDI 3.9 The maximum reported intensity for the event.
MMI 3.82 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 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 341 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 ,at,us, 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 0.336 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 1.05 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 21 The largest azimuthal gap between azimuthally adjacent stations (in degrees).
Magnitude Type mwr The method or algorithm used to calculate the preferred magnitude for the event.
Event Type earthquake Type of seismic event.
Event ID us1000hz9c Id of event.
Event Code 1000hz9c An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,at00pj1m15,us1000hz9c, A comma-separated list of event ids that are associated to an event.

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