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Light World Earthquakes Magnitude 4-4.9

Light earthquake, 4 mag strikes near Atka in Alaska


Earthquake location 51.3464S, -174.1374WA light earthquake magnitude 4 (ml/mb) strikes 94 km S of Atka, Alaska (58 miles) on Monday. The epicenter was at a depth of 10 km (6 miles). Id of earthquake: us20005bi2. Event ids that are associated: ak13033320, us20005bi2. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Global date and time of event UTC/GMT: 21/03/16 / 2016-03-21 15:32:29 / March 21, 2016 @ 3:32 pm. Exact location, longitude -174.1374° West, latitude 51.3464° North, depth = 10 km. The temblor was picked up at 03:32:29 / 3:32 am (local time epicenter).

In the past 24 hours, there have been sixteen, in the last 10 days ninety-nine, in the past 30 days one hundred and three and in the last 365 days three hundred and sixty earthquakes of magnitude 3.0 or greater that have been detected nearby. 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.

How would you describe the shaking?

What was your situation during the earthquake? Leave a comment or report about damage, shaking and activity at your home, city and country. This data comes from the USGS Earthquake Notification Service. Read more about the earthquake, Seismometer information, Distances, Parameters, Date-Time, Location and details about this quake, that has occurred near: 94 km S of Atka, Alaska.

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More information

Parameter Value Description
Magnitude 4 mb The magnitude for the event.
Longitude -174.1374° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 51.3464° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 10 km Depth of the event in kilometers.
Place 94km 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 2016-03-21 15:32:29 Time when the event occurred. UTC/GMT
Updated 2016-04-17 19:49:06 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 0.857 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.93 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 142 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 us20005bi2 Id of event.
Event Code 20005bi2 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,ak13033320,us20005bi2, A comma-separated list of event ids that are associated to an event.

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