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Light World Earthquakes Magnitude 4-4.9

Light earthquake 4.4 mag, 27 km SSE of Atka, Alaska


Earthquake location 51.9879S, -173.9883WA light earthquake magnitude 4.4 (mg/mb) was reported Saturday, 27 kilometers (17 miles) from Atka in Alaska. The temblor was reported at 04:02:05 / 4:02 am (local time epicenter) at a depth of 47.13 km (29 miles). Global time of event 21/02/15 / 2015-02-21 14:02:05 / February 21, 2015 @ 2:02 pm UTC/GMT. A tsunami warning has not been issued, according to the U.S. Geological Survey. Exact location of event, longitude -173.9883 West, latitude 51.9879 North, depth 47.13 km, unique identifier, usc000ts4j.

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Leave a comment or report about shaking, activity and damage at your home, city and country. Read more about the earthquake, Seismometer information, Date-Time, Location, Distances, Parameters and details about this quake, recorded in: 27 km SSE of Atka, Alaska.


More information

Parameter Value Description
Magnitude 4.4 mb The magnitude for the event.
Longitude -173.9883° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 51.9879° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 47.13 km Depth of the event in kilometers.
Place 27km 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 2015-02-21 14:02:05 Time when the event occurred. UTC/GMT
Updated 2015-02-21 15:00:56 Time when the event was most recently updated. UTC/GMT
Timezone offset -600 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 298 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 0.25 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 1.37 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 177 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 usc000ts4j Id of event.
Event Code c000ts4j An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,usc000ts4j, A comma-separated list of event ids that are associated to an event.

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