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Earthquake breaking news, Light World Earthquakes Magnitude 4-4.9

Light earthquake: M4 quake has struck near Atka in Alaska



Earthquake location 51.9741S, -173.3509WA light earthquake magnitude 4 (ml/mb) strikes 63 km ESE of Atka, Alaska (39 miles) on Monday. Global time and date of event 11/09/17 / 2017-09-11 20:40:49 / September 11, 2017 @ 8:40 pm UTC/GMT. The earthquake occurred at a depth of 41.5 km (26 miles) below the earth’s surface. The temblor was detected at 10:40:49 / 10:40 am (local time epicenter). A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Unique identifier: ak16818340. Ids that are associated to the event: ak16818340. Exact location, longitude -173.3509° West, latitude 51.9741° North, depth = 41.5 km.

In the past 24 hours, there have been one, in the last 10 days three, in the past 30 days eight and in the last 365 days one hundred and nineteen earthquakes of magnitude 3.0 or greater that have been detected in the same area. 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.

Questions or comments?

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. 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: 63 km ESE of Atka, Alaska.

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More information

Parameter Value Description
Magnitude 4 mb The magnitude for the event.
Longitude -173.3509° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 51.9741° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 41.5 km Depth of the event in kilometers.
Place 63km ESE 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 2017-09-11 20:40:49 Time when the event occurred. UTC/GMT
Updated 2017-09-11 21:26:14 Time when the event was most recently updated. UTC/GMT
Timezone offset -600 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 2.96 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 ak The ID of a data contributor. Identifies the network considered to be the preferred source of information for this event.
Sources ,ak, 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 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.48 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap The largest azimuthal gap between azimuthally adjacent stations (in degrees).
Magnitude Type ml The method or algorithm used to calculate the preferred magnitude for the event.
Event Type earthquake Type of seismic event.
Event ID ak16818340 Id of event.
Event Code 16818340 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,ak16818340, A comma-separated list of event ids that are associated to an event.

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