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Light earthquake: M4 quake has struck near Semisopochnoi Island in Alaska

Posted by admin on May 12, 2016 0 Comments

Earthquake location 52.3025S, 179.9803WA light earthquake with magnitude 4 (ml/mb) was reported 46 km NNE of Semisopochnoi Island, Alaska (29 miles) on Monday. Exact location of event, longitude 179.9803 East, latitude 52.3025 North, depth = 174.81 km. Exact time and date of event in UTC/GMT: 17/04/16 / 2016-04-17 14:02:50 / April 17, 2016 @ 2:02 pm. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). The 4-magnitude earthquake has occurred at 02:02:50 / 2:02 am (local time epicenter). Unique identifier: us10005bvd. Ids that are associated to the event: ak13472227, us10005bvd. The epicenter was at a depth of 174.81 km (109 miles).

In the past 24 hours, there have been five, in the last 10 days eight, in the past 30 days thirteen and in the last 365 days fourty-five earthquakes of magnitude 3.0 or greater that have been detected in the same area. There are an estimated 13,000 light earthquakes in the world each year. Earthquakes 4.0 to 5.0 are often felt, but only causes minor damage.

Questions or comments?

How did you react? Was there any damage to buildings? Leave a comment or report about shaking, activity and damage at your home, city and country. Read more about the earthquake, Location, Distances, Seismometer information, Date-Time, Parameters and details about this quake, reported near: 46 km NNE of Semisopochnoi Island, Alaska. This information comes from the USGS Earthquake Notification Service.

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More information

Parameter Value Description
Magnitude 4 mb The magnitude for the event.
Longitude 179.9803° East Decimal degrees longitude. Negative values for western longitudes.
Latitude 52.3025° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 174.81 km Depth of the event in kilometers.
Place 46km NNE of Semisopochnoi 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 2016-04-17 14:02:50 Time when the event occurred. UTC/GMT
Updated 2016-05-12 20:16:30 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 0.892 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.42 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 265 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 us10005bvd Id of event.
Event Code 10005bvd An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,ak13472227,us10005bvd, A comma-separated list of event ids that are associated to an event.

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