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Light World Earthquakes Magnitude 4-4.9

Light earthquake, 4 mag strikes near Atka in Alaska



Earthquake location 51.3125S, -173.8848WA light earthquake magnitude 4 (ml/mb) has struck on Saturday, 100 km SSE of Atka, Alaska (62 miles). Date and time of earthquake in UTC/GMT: 12/03/16 / 2016-03-12 19:59:05 / March 12, 2016 @ 7:59 pm. The 4-magnitude earthquake was detected at 07:59:05 / 7:59 am (local time epicenter). Id of earthquake: us20005a83. Event ids that are associated: ak12969839, us20005a83. The earthquake occurred at a depth of 10 km (6 miles). Exact location of event, depth 10 km, -173.8848° West, 51.3125° North. 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 quakes 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 seventy-six, in the last 10 days seventy-nine, in the past 30 days eighty-five and in the last 365 days three hundred and thirty-five earthquakes of magnitude 3.0 or greater that have been detected in the same area.

Did you feel anything?

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: 100 km SSE of Atka, Alaska.

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More information

Parameter Value Description
Magnitude 4 mb The magnitude for the event.
Longitude -173.8848° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 51.3125° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 10 km Depth of the event in kilometers.
Place 100km SSE 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 2016-03-12 19:59:05 Time when the event occurred. UTC/GMT
Updated 2016-04-01 04:44:58 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 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 0.911 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 196 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 us20005a83 Id of event.
Event Code 20005a83 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,ak12969839,us20005a83, A comma-separated list of event ids that are associated to an event.

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