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Minor earthquake: M2.8 quake strikes near Semisopochnoi Island in Alaska

Posted by admin on April 22, 2015 0 Comments

Earthquake location 51.9085S, 179.4624WA minor earthquake magnitude 2.8 (mg/mb) has occurred on Friday, 10 kilometers (6 miles) from Semisopochnoi Island in Alaska. The temblor was reported at 01:08:52 / 1:08 am (local time epicenter) at a depth of 160.4 km (100 miles). Global time of event 17/04/15 / 2015-04-17 10:08:52 / April 17, 2015 @ 10:08 am UTC/GMT. A tsunami warning has not been issued, according to the U.S. Geological Survey. Exact location of event, longitude 179.4624 East, latitude 51.9085 North, depth 160.4 km, unique identifier, ak11558831.

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Leave a comment or report about shaking, activity and damage at your home, city and country. Read more about the earthquake, Seismometer information, Date-Time, Location, Distances, Parameters and details about this quake, recorded in: 10 km WSW of Semisopochnoi Island, Alaska.


More information

Parameter Value Description
Magnitude 2.8 mb The magnitude for the event.
Longitude 179.4624° East Decimal degrees longitude. Negative values for western longitudes.
Latitude 51.9085° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 160.4 km Depth of the event in kilometers.
Place 10km WSW 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 2015-04-17 10:08:52 Time when the event occurred. UTC/GMT
Updated 2015-04-22 21:18:42 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 0.31 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 ak11558831 Id of event.
Event Code 11558831 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,ak11558831, A comma-separated list of event ids that are associated to an event.

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