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Light earthquake, 4.2 mag has occurred near Big Lake in Alaska


Earthquake location 61.395S, -150.856WA light earthquake magnitude 4.2 (ml/mb) has struck on Thursday, 50 kilometers (31 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). The earthquake occurred at a depth of 65 km (40 miles). The temblor was detected at 17:07:12 / 5:07 pm (local time epicenter). Global date and time of event UTC/GMT: 06/07/18 / 2018-07-06 02:07:12 / July 6, 2018 @ 2:07 am. Exact location, longitude -150.856° West, latitude 61.395° North, depth = 65 km. Unique identifier: at00pbf9w0. Ids that are associated to the event: at00pbf9w0.

Country/countries that might be effected, United States (c. 310 233 000 pop). Epicenter of the event was 55 km (34 miles) from Anchorage (c. 291 800 pop), 69 km (43 miles) from Eagle River (c. 24 800 pop), 68 km (42 miles) from Knik-Fairview (c. 14 900 pop), 85 km (53 miles) from Lakes (c. 8 400 pop), 80 km (50 miles) from Tanaina (c. 8 200 pop), 78 km (48 miles) from Wasilla (c. 7 800 pop). Nearest city/cities or towns, with min 5000 pop, to epicentrum/hypocenter was Gateway, Lakes, Tanaina.

Earthquakes 4.0 to 5.0 are often felt, but only causes minor damage. In the past 24 hours, there have been two, in the last 10 days two, in the past 30 days six and in the last 365 days fifty-six earthquakes of magnitude 3.0 or greater that was reported nearby. Every year there are an estimated 13,000 light earthquakes in the world.

Did you feel the quake?

What was your situation during the earthquake? Leave a comment or report about damage, shaking and activity at your home, city and country. The information in this article comes from the USGS Earthquake Notification Service. Read more about the earthquake, Seismometer information, Distances, Parameters, Date-Time, Location and details about this quake, detected near: 50 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 -150.856° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 61.395° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 65 km Depth of the event in kilometers.
Place 50km 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 2018-07-06 02:07:12 Time when the event occurred. UTC/GMT
Updated 2018-07-06 02:16:15 Time when the event was most recently updated. UTC/GMT
Timezone offset -540 Timezone offset from UTC in minutes at the event epicenter.
Felt 25 The total number of felt reports
CDI 3.4 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 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 280 A number describing how significant the event is. Larger numbers indicate a more significant event.
Network at The ID of a data contributor. Identifies the network considered to be the preferred source of information for this event.
Sources ,at, A comma-separated list of network contributors.
Number of Stations Used 59 The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance 0.5021582 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.57 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 28.799997696 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 at00pbf9w0 Id of event.
Event Code 00pbf9w0 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,at00pbf9w0, A comma-separated list of event ids that are associated to an event.

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