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Light earthquake, 4 mag strikes near Nikolski in Alaska

Posted by admin on July 31, 2020 0 Comments

Earthquake location 51.3196S, -168.5831WA light earthquake with magnitude 4 (ml/mb) was reported 181 km S of Nikolski, Alaska (112 miles) on Friday. The earthquake was roughly at a depth of 22.77 km (14 miles). Exact location of event, longitude -168.5831 West, latitude 51.3196 North, depth = 22.77 km. Exact time and date of earthquake 31/07/20 / 2020-07-31 18:43:54 / July 31, 2020 @ 6:43 pm UTC/GMT. All ids that are associated to the event: us6000b7k3. Unique identifier: us6000b7k3. The 4-magnitude earthquake was detected at 18:43:54 / 6:43 pm (local time epicenter). A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist).

There are an estimated 13,000 light earthquakes in the world each year. 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 thirty-five earthquakes of magnitude 3.0 or greater that have been detected nearby.

Did you feel the quake?

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. 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: 181 km S of Nikolski, Alaska.

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More information

Parameter Value Description
Magnitude 4 mb The magnitude for the event.
Longitude -168.5831° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 51.3196° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 22.77 km Depth of the event in kilometers.
Place 181 km 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 2020-07-31 18:43:54 Time when the event occurred. UTC/GMT
Updated 2020-07-31 19:12:48 Time when the event was most recently updated. UTC/GMT
Timezone offset 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 us The ID of a data contributor. Identifies the network considered to be the preferred source of information for this event.
Sources ,us, 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 1.71 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 1.36 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 186 The largest azimuthal gap between azimuthally adjacent stations (in degrees).
Magnitude Type mb The method or algorithm used to calculate the preferred magnitude for the event.
Event Type earthquake Type of seismic event.
Event ID us6000b7k3 Id of event.
Event Code 6000b7k3 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us6000b7k3, A comma-separated list of event ids that are associated to an event.

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