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Light earthquake: M4 quake has struck near Nikolski in Alaska

Posted by admin on August 18, 2015 0 Comments

Earthquake location 52.0975S, -168.8699WA light earthquake magnitude 4 (ml/mb) has occurred on Monday, 93 km S of Nikolski, Alaska (58 miles). Exact location of event, longitude -168.8699 West, latitude 52.0975 North, depth = 17.8 km. The earthquake occurred at a depth of 17.8 km (11 miles). Date and time of earthquake in UTC/GMT: 17/08/15 / 2015-08-17 20:45:16 / August 17, 2015 @ 8:45 pm. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Unique identifier: ak11680600. Ids that are associated to the event: ak11680600. The temblor was detected at 09:45:16 / 9:45 am (local time epicenter).

Earthquakes 4.0 to 5.0 are often felt, but only causes minor damage. There are an estimated 13,000 light quakes in the world each year. In the past 24 hours, there have been one, in the last 10 days twelve, in the past 30 days one hundred and eighty-nine and in the last 365 days two hundred and sixty-seven earthquakes of magnitude 3.0 or greater that have been detected in the same area.

Questions or comments?

Were you asleep? Was it difficult to stand and/or walk? Leave a comment or report about shaking, activity and damage at your city, home 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: 93 km S of Nikolski, Alaska.

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More information

Parameter Value Description
Magnitude 4 mb The magnitude for the event.
Longitude -168.8699° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 52.0975° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 17.8 km Depth of the event in kilometers.
Place 93km S of Nikolski, Alaska Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2015-08-17 20:45:16 Time when the event occurred. UTC/GMT
Updated 2015-08-18 04:47:49 Time when the event was most recently updated. UTC/GMT
Timezone offset -660 Timezone offset from UTC in minutes at the event epicenter.
Felt The total number of felt reports
CDI 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 0 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 246 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, 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 0.83 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 ak11680600 Id of event.
Event Code 11680600 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,ak11680600, A comma-separated list of event ids that are associated to an event.

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