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Light World Earthquakes Magnitude 4-4.9

Light earthquake, 4 mag was detected near Atka in Alaska


Earthquake location 51.4605S, -174.0429WA light earthquake magnitude 4 (ml/mb) has struck on Tuesday, 82 km S of Atka, Alaska (51 miles). Exact time and date of earthquake 28/08/18 / 2018-08-28 19:00:12 / August 28, 2018 @ 7:00 pm UTC/GMT. All ids that are associated to the event: ak20237196, us1000gj4j. Unique identifier: us1000gj4j. Exact location of event, longitude -174.0429 West, latitude 51.4605 North, depth = 56.54 km. The earthquake occurred at a depth of 56.54 km (35 miles). The temblor was picked up at 07:00:12 / 7:00 am (local time epicenter). A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist).

In the past 24 hours, there have been three, in the last 10 days three, in the past 30 days twelve and in the last 365 days one hundred and thirty-nine 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. There are an estimated 13,000 light earthquakes in the world each year.

Did you feel it?

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: 82 km S of Atka, Alaska.

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More information

Parameter Value Description
Magnitude 4 mb The magnitude for the event.
Longitude -174.0429° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 51.4605° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 56.54 km Depth of the event in kilometers.
Place 82km S of Atka, Alaska Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2018-08-28 19:00:12 Time when the event occurred. UTC/GMT
Updated 2018-08-30 21:22:28 Time when the event was most recently updated. UTC/GMT
Timezone offset -720 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 ,ak,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 0.815 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 1.01 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 208 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 us1000gj4j Id of event.
Event Code 1000gj4j An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,ak20237196,us1000gj4j, A comma-separated list of event ids that are associated to an event.

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