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Light World Earthquakes Magnitude 4-4.9

Light earthquake 4.1 mag, 43 km SW of Atka, Alaska

Posted by admin on October 13, 2015 0 Comments

Earthquake location 51.8996S, -174.6239WA light earthquake with magnitude 4.1 (ml/mb) was detected on Wednesday, 43 km SW of Atka, Alaska (27 miles). All ids that are associated to the event: ak11721366, us20003nc6. Unique identifier: us20003nc6. The epicenter of the earthquake was roughly 63.47 km (39 miles) below the earth’s surface. Exact time and date of event in UTC/GMT: 23/09/15 / 2015-09-23 15:21:55 / September 23, 2015 @ 3:21 pm. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Exact location of event, longitude -174.6239 West, latitude 51.8996 North, depth = 63.47 km. The temblor was detected at 06:21:55 / 6:21 am (local time epicenter).

Earthquakes 4.0 to 5.0 are often felt, but only causes minor damage. In the past 24 hours, there have been ten, in the last 10 days seventeen, in the past 30 days ninety-three and in the last 365 days two hundred and twenty-four earthquakes of magnitude 3.0 or greater that have been detected in the same area. Each year there are an estimated 13,000 light quakes in the world.

Questions or comments?

What was your situation during the earthquake? Leave a comment or report about damage, shaking and activity at your home, city 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: 43 km SW of Atka, Alaska.

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More information

Parameter Value Description
Magnitude 4.1 mb The magnitude for the event.
Longitude -174.6239° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 51.8996° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 63.47 km Depth of the event in kilometers.
Place 43km SW 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 2015-09-23 15:21:55 Time when the event occurred. UTC/GMT
Updated 2015-10-13 02:02:09 Time when the event was most recently updated. UTC/GMT
Timezone offset -540 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 2.86 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 259 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 0.401 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 1.1 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 us20003nc6 Id of event.
Event Code 20003nc6 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,ak11721366,us20003nc6, A comma-separated list of event ids that are associated to an event.

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