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


Earthquake location 51.0348S, 179.2266WA minor earthquake magnitude 2.8 (ml/mb) has struck on Sunday, 105 km SSW of Semisopochnoi Island, Alaska (65 miles). Exact time and date of event in UTC/GMT: 05/08/18 / 2018-08-05 03:08:11 / August 5, 2018 @ 3:08 am. The epicenter was at a depth of 21.01 km (13 miles). Exact location of event, longitude 179.2266 East, latitude 51.0348 North, depth = 21.01 km. The temblor was reported at 15:08:11 / 3:08 pm (local time epicenter). Event ids that are associated to the earthquake: ak20006902, us1000g6jv. Id of event: us1000g6jv.

Earthquakes 2.5 to 2.9 are often felt, but only causes minor damage. In the past 24 hours, there have been five, in the last 10 days six, in the past 30 days twelve and in the last 365 days one hundred and eleven earthquakes of magnitude 3.0 or greater that have been detected nearby. There are an estimated 1,300,000 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. This data comes from the USGS Earthquake Notification Service. Read more about the earthquake, Seismometer information, Distances, Parameters, Date-Time, Location and details about this quake, that has occurred near: 105 km SSW of Semisopochnoi Island, Alaska.

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More information

Parameter Value Description
Magnitude 2.8 mb The magnitude for the event.
Longitude 179.2266° East Decimal degrees longitude. Negative values for western longitudes.
Latitude 51.0348° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 21.01 km Depth of the event in kilometers.
Place 105km SSW 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 2018-08-05 03:08:11 Time when the event occurred. UTC/GMT
Updated 2018-08-14 03:12:08 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 121 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 0.345 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.7 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 266 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 us1000g6jv Id of event.
Event Code 1000g6jv An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,ak20006902,us1000g6jv, A comma-separated list of event ids that are associated to an event.

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