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Light earthquake, 4.2 mag has occurred near Nikiski in Alaska



Earthquake location 60.6516S, -151.1638WA light earthquake magnitude 4.2 (ml/mb) strikes 8 kilometers (5 miles) from Nikiski in Alaska on Monday. A tsunami warning has been issued near Nikiski in Alaska (Does not indicate if a tsunami actually did or will exist). The earthquake occurred at a depth of 51.1 km (32 miles). The 4.2-magnitude earthquake has occurred at 12:05:02 / 12:05 pm (local time epicenter). Global time and date of event 04/09/17 / 2017-09-04 21:05:02 / September 4, 2017 @ 9:05 pm UTC/GMT. Exact location of earthquake, longitude -151.1638 West, latitude 60.6516 North, depth = 51.1 km. Event id: ak16764231. Ids that are associated to the earthquake: at00ovrx8f, ak16764231.

Earthquake epicenter was 93 km (58 miles) from Anchorage (c. 291 800 pop), 27 km (17 miles) from Kalifornsky (c. 7 900 pop), 12 km (7 miles) from Kenai (c. 7 100 pop), 25 km (16 miles) from Sterling (c. 5 600 pop). Close country/countries that might be effected, United States (c. 310 233 000 pop). Nearest cities/city/villages to epicentrum/hypocenter was Anchorage, Kalifornsky, Sterling (min 5000 pop).

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 six, in the past 30 days ten and in the last 365 days eighty-one earthquakes of magnitude 3.0 or greater that has struck near. There are an estimated 13,000 light quakes in the world each year.

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: 8 km ESE of Nikiski, Alaska.

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More information

Parameter Value Description
Magnitude 4.2 mb The magnitude for the event.
Longitude -151.1638° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 60.6516° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 51.1 km Depth of the event in kilometers.
Place 8km ESE of Nikiski, Alaska Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2017-09-04 21:05:02 Time when the event occurred. UTC/GMT
Updated 2017-09-04 21:20:32 Time when the event was most recently updated. UTC/GMT
Timezone offset -540 Timezone offset from UTC in minutes at the event epicenter.
Felt 43 The total number of felt reports
CDI 3.2 The maximum reported intensity for the event.
MMI 3.2 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 285 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 ,at,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 0.7 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 ak16764231 Id of event.
Event Code 16764231 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,at00ovrx8f,ak16764231, A comma-separated list of event ids that are associated to an event.

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