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Earthquake breaking news, Light World Earthquakes Magnitude 4-4.9

Light earthquake, 4.6 mag strikes near Little Sitkin Island in Alaska



Earthquake location 51.9562S, 178.3742WA light earthquake with magnitude 4.6 (ml/mb) was detected on Monday, 8 km W of Little Sitkin Island, Alaska (5 miles). 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: 21/08/17 / 2017-08-21 17:53:38 / August 21, 2017 @ 5:53 pm. Exact location of earthquake, longitude 178.3742 East, latitude 51.9562 North, depth = 111.52 km. Event ids that are associated to the earthquake: us2000aa8u. Id of event: us2000aa8u. The temblor was picked up at 07:53:38 / 7:53 am (local time epicenter). The epicenter of the earthquake was roughly 111.52 km (69 miles) below the earth’s surface.

Earthquakes 4.0 to 5.0 are often felt, but only causes minor damage. Each year there are an estimated 13,000 light earthquakes in the world. In the past 24 hours, there have been one, in the last 10 days two, in the past 30 days seven and in the last 365 days one hundred and thirty-eight earthquakes of magnitude 3.0 or greater that has struck near.

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. Read more about the earthquake, Location, Distances, Seismometer information, Date-Time, Parameters and details about this quake, reported near: 8 km W of Little Sitkin Island, Alaska. This information comes from the USGS Earthquake Notification Service.

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More information

Parameter Value Description
Magnitude 4.6 mb The magnitude for the event.
Longitude 178.3742° East Decimal degrees longitude. Negative values for western longitudes.
Latitude 51.9562° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 111.52 km Depth of the event in kilometers.
Place 8km W of Little Sitkin Island, Alaska Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2017-08-21 17:53:38 Time when the event occurred. UTC/GMT
Updated 2017-08-21 18:10:44 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 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 326 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 0.817 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 1.08 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 153 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 us2000aa8u Id of event.
Event Code 2000aa8u An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us2000aa8u, A comma-separated list of event ids that are associated to an event.

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