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

Earthquake location 51.8751S, 179.9835WA minor earthquake magnitude 2.8 (ml/mb) strikes 27 km ESE of Semisopochnoi Island, Alaska (17 miles) on Saturday. The earthquake occurred at a depth of 172.9 km (107 miles). Exact time and date of earthquake 09/02/20 / 2020-02-09 09:30:59 / February 9, 2020 @ 9:30 am UTC/GMT. The temblor was picked up at 23:30:59 / 11:30 pm (local time epicenter). Exact location, longitude 179.9835° East, latitude 51.8751° North, depth = 172.9 km. Event id: ak0201ub1caf. Ids that are associated to the earthquake: ak0201ub1caf.

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

Did you feel it?

Did objects rattle, topple over, or fall off shelves? Leave a comment or report about activity, shaking and damage at your home, country and city. This information comes from the USGS Earthquake Notification Service. Read more about the earthquake, Seismometer information, Date-Time, Location, Distances, Parameters and details about this quake, recorded: 27 km ESE of Semisopochnoi Island, Alaska.

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More information

Parameter Value Description
Magnitude 2.8 mb The magnitude for the event.
Longitude 179.9835° East Decimal degrees longitude. Negative values for western longitudes.
Latitude 51.8751° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 172.9 km Depth of the event in kilometers.
Place 27km ESE 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 2020-02-09 09:30:59 Time when the event occurred. UTC/GMT
Updated 2020-02-22 02:22:38 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 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 0.52 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 ak0201ub1caf Id of event.
Event Code 0201ub1caf An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,ak0201ub1caf, A comma-separated list of event ids that are associated to an event.

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