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Light earthquake: M4.6 quake has struck near Big Lake in Alaska

Earthquake location 61.4368S, -149.9116WA light earthquake with magnitude 4.6 (ml/mb) was detected on Saturday, 9 kilometers (6 miles) from Big Lake in Alaska. A tsunami warning has been issued near Big Lake in Alaska (Does not indicate if a tsunami actually did or will exist). Exact location of earthquake, longitude -149.9116 West, latitude 61.4368 North, depth = 20 km. Global time and date of event 01/12/18 / 2018-12-01 12:44:52 / December 1, 2018 @ 12:44 pm UTC/GMT. The earthquake occurred at a depth of 20 km (12 miles) below the earth’s surface. The 4.6-magnitude earthquake was detected at 03:44:52 / 3:44 am (local time epicenter). All ids that are associated to the event: ak20422875, at00pj262s. Unique identifier: ak20422875.

Country/countries that might be effected, United States (c. 310 233 000 pop). Event epicenter was 24 km (15 miles) from Anchorage (c. 291 800 pop), 22 km (14 miles) from Eagle River (c. 24 800 pop), 19 km (12 miles) from Knik-Fairview (c. 14 900 pop), 37 km (23 miles) from Lakes (c. 8 400 pop), 33 km (21 miles) from Tanaina (c. 8 200 pop), 30 km (18 miles) from Wasilla (c. 7 800 pop), 27 km (17 miles) from Meadow Lakes (c. 7 600 pop). Closest city/cities or villages, with min 5000 pop, to hypocenter/epicentrum was Palmer, Gateway, Lakes.

There are an estimated 13,000 light quakes in the world each year. In the past 24 hours, there have been one hundred and thirty-six, in the last 10 days one hundred and thirty-nine, in the past 30 days one hundred and fourty and in the last 365 days one hundred and ninety-nine earthquakes of magnitude 3.0 or greater that has occurred nearby. Earthquakes 4.0 to 5.0 are often felt, but only causes minor damage.

Did you feel anything?

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: 9 km SSE of Big Lake, Alaska. This information comes from the USGS Earthquake Notification Service.

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More information

Parameter Value Description
Magnitude 4.6 mb The magnitude for the event.
Longitude -149.9116° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 61.4368° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 20 km Depth of the event in kilometers.
Place 9km SSE 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 12:44:52 Time when the event occurred. UTC/GMT
Updated 2018-12-01 12:52:42 Time when the event was most recently updated. UTC/GMT
Timezone offset -540 Timezone offset from UTC in minutes at the event epicenter.
Felt 7 The total number of felt reports
CDI 4.7 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 329 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,at, 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 0.73 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 ak20422875 Id of event.
Event Code 20422875 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,ak20422875,at00pj262s, A comma-separated list of event ids that are associated to an event.

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