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Minor earthquake: M2.9 quake has struck near Semisopochnoi Island in Alaska



Earthquake location 51.3948S, 179.8037WA minor earthquake with magnitude 2.9 (ml/mb) was detected on Sunday, 63 km SSE of Semisopochnoi Island, Alaska (39 miles). Global date and time of event UTC/GMT: 12/03/17 / 2017-03-12 01:39:47 / March 12, 2017 @ 1:39 am. The earthquake occurred at a depth of 46 km (29 miles). The temblor was detected at 13:39:47 / 1:39 pm (local time epicenter). Exact location of earthquake, 179.8037° East, 51.3948° North, depth 46 km. All ids that are associated to the event: ak15469157, us20008sdh. Unique identifier: us20008sdh.

In the past 24 hours, there have been four, in the last 10 days six, in the past 30 days nine and in the last 365 days one hundred and twenty-eight earthquakes of magnitude 3.0 or greater that have been detected nearby. Earthquakes 2.5 to 3.5 are often felt, but only causes minor damage. There are an estimated 130,000 minor quakes in the world each year.

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, Distances, Seismometer information, Date-Time, Parameters, Location and details about this quake, that has struck: 63 km SSE of Semisopochnoi Island, Alaska. This data comes from the USGS Earthquake Notification Service.

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More information

Parameter Value Description
Magnitude 2.9 mb The magnitude for the event.
Longitude 179.8037° East Decimal degrees longitude. Negative values for western longitudes.
Latitude 51.3948° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 46 km Depth of the event in kilometers.
Place 63km SSE 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 2017-03-12 01:39:47 Time when the event occurred. UTC/GMT
Updated 2017-03-17 03:14:41 Time when the event was most recently updated. UTC/GMT
Timezone offset 720 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 129 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 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.63 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 us20008sdh Id of event.
Event Code 20008sdh An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,ak15469157,us20008sdh, A comma-separated list of event ids that are associated to an event.

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