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Minor earthquake, 2.8 mag has occurred near Semisopochnoi Island in Alaska



Earthquake location 52.0464S, 179.638WA minor earthquake magnitude 2.8 (ml/mb) has occurred on Saturday, 10 km NNE of Semisopochnoi Island, Alaska (6 miles). The 2.8-magnitude earthquake was detected at 05:52:24 / 5:52 am (local time epicenter). The epicenter was at a depth of 186.3 km (116 miles). Exact time and date of event in UTC/GMT: 09/04/16 / 2016-04-09 14:52:24 / April 9, 2016 @ 2:52 pm. Exact location of event, depth 186.3 km, 179.638° East, 52.0464° North. Event id: ak13449870. Ids that are associated to the earthquake: ak13449870.

In the past 24 hours, there have been one, in the last 10 days four, in the past 30 days fourteen and in the last 365 days one hundred and four earthquakes of magnitude 3.0 or greater that have been detected in the same area. Each year there are an estimated 1,300,000 minor quakes in the world. Earthquakes 2.5 to 2.9 are often felt, but only causes minor damage.

Did you feel anything?

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: 10 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 2.8 mb The magnitude for the event.
Longitude 179.638° East Decimal degrees longitude. Negative values for western longitudes.
Latitude 52.0464° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 186.3 km Depth of the event in kilometers.
Place 10km 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 2016-04-09 14:52:24 Time when the event occurred. UTC/GMT
Updated 2016-04-15 21:06:49 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 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 121 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 0.58 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 ak13449870 Id of event.
Event Code 13449870 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,ak13449870, A comma-separated list of event ids that are associated to an event.

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