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Light earthquake 4.2 mag, 18 km WSW of Big Lake, Alaska

Posted by admin on December 17, 2018 0 Comments

Earthquake location 61.4431S, -150.2507WA light earthquake with magnitude 4.2 (ml/mb) was detected on Sunday, 18 kilometers (11 miles) from Big Lake in Alaska. The 4.2-magnitude earthquake was detected at 17:04:30 / 5:04 pm (local time epicenter). Event ids that are associated to the earthquake: ak20518251, at00pjuz3j. Id of event: ak20518251. Global time and date of event 17/12/18 / 2018-12-17 02:04:30 / December 17, 2018 @ 2:04 am UTC/GMT. Exact location of event, longitude -150.2507 West, latitude 61.4431 North, depth = 50.9 km. The epicenter of the earthquake was roughly 50.9 km (32 miles) below the earth’s surface. A tsunami warning has been issued near Big Lake in Alaska (Does not indicate if a tsunami actually did or will exist).

Close country/countries, United States (c. 310 233 000 pop) (That might be effected). Epicenter of the event was 31 km (19 miles) from Anchorage (c. 291 800 pop), 39 km (24 miles) from Eagle River (c. 24 800 pop), 35 km (22 miles) from Knik-Fairview (c. 14 900 pop), 53 km (33 miles) from Lakes (c. 8 400 pop), 48 km (30 miles) from Tanaina (c. 8 200 pop), 46 km (28 miles) from Wasilla (c. 7 800 pop). Closest city/cities or villages, with min 5000 pop, to hypocenter/epicentrum was Palmer, Gateway, Lakes.

In the past 24 hours, there have been three, in the last 10 days fourty-three, in the past 30 days three hundred and ninety-two and in the last 365 days four hundred and fourty-six earthquakes of magnitude 3.0 or greater that have been detected nearby. 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.

How would you describe the shaking?

How did you react? Was there any damage to buildings? Leave a comment or report about shaking, activity and damage at your home, city 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: 18 km WSW of Big Lake, Alaska.

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More information

Parameter Value Description
Magnitude 4.2 mb The magnitude for the event.
Longitude -150.2507° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 61.4431° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 50.9 km Depth of the event in kilometers.
Place 18km WSW 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 2018-12-17 02:04:30 Time when the event occurred. UTC/GMT
Updated 2018-12-17 02:11:52 Time when the event was most recently updated. UTC/GMT
Timezone offset -540 Timezone offset from UTC in minutes at the event epicenter.
Felt 21 The total number of felt reports
CDI 3.1 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 278 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 0.71 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 ak20518251 Id of event.
Event Code 20518251 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,ak20518251,at00pjuz3j, A comma-separated list of event ids that are associated to an event.

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