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Light World Earthquakes Magnitude 4-4.9

Light earthquake, 4.1 mag was detected near Atka in Alaska



Earthquake location 50.9975S, -173.8821WA light earthquake magnitude 4.1 (ml/mb) strikes 135 km S of Atka, Alaska (84 miles) on Tuesday. Exact time and date of earthquake 30/09/15 / 2015-09-30 01:26:20 / September 30, 2015 @ 1:26 am UTC/GMT. Exact location of event, depth 22.3 km, -173.8821° West, 50.9975° North. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). All ids that are associated to the event: ak11727037, us10003kkm. Unique identifier: us10003kkm. The earthquake occurred at a depth of 22.3 km (14 miles) below the earth’s surface. The 4.1-magnitude earthquake has occurred at 13:26:20 / 1:26 pm (local time epicenter).

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

Questions or comments?

How did you respond? Did any furniture slide, topple over, or become displaced? Leave a comment or report about activity, shaking 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: 135 km S of Atka, Alaska.

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More information

Parameter Value Description
Magnitude 4.1 mb The magnitude for the event.
Longitude -173.8821° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 50.9975° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 22.3 km Depth of the event in kilometers.
Place 135km 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 2015-09-30 01:26:20 Time when the event occurred. UTC/GMT
Updated 2015-10-06 03:04:17 Time when the event was most recently updated. UTC/GMT
Timezone offset -720 Timezone offset from UTC in minutes at the event epicenter.
Felt 0 The total number of felt reports
CDI 1 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 259 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 1.747 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.92 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 202 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 us10003kkm Id of event.
Event Code 10003kkm An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,ak11727037,us10003kkm, A comma-separated list of event ids that are associated to an event.

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