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


Earthquake location 51.9636S, 179.937WA minor earthquake with magnitude 2.8 (ml/mb) was detected on Sunday, 23 km E of Semisopochnoi Island, Alaska (14 miles). The earthquake was roughly at a depth of 196.79 km (122 miles). Exact time and date of earthquake 17/06/18 / 2018-06-17 11:18:44 / June 17, 2018 @ 11:18 am UTC/GMT. Exact location of earthquake, longitude 179.937 East, latitude 51.9636 North, depth = 196.79 km. The temblor was reported at 01:18:44 / 1:18 am (local time epicenter). Unique identifier: us1000ew0d. Ids that are associated to the event: ak19784310, us1000ew0d.

Each year there are an estimated 1,300,000 minor earthquakes in the world. In the past 24 hours, there have been 0, in the last 10 days two, in the past 30 days four and in the last 365 days eighty-three 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.

Did you feel anything?

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 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: 23 km E of Semisopochnoi Island, Alaska.

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More information

Parameter Value Description
Magnitude 2.8 mb The magnitude for the event.
Longitude 179.937° East Decimal degrees longitude. Negative values for western longitudes.
Latitude 51.9636° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 196.79 km Depth of the event in kilometers.
Place 23km E 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 2018-06-17 11:18:44 Time when the event occurred. UTC/GMT
Updated 2018-06-22 12:29:25 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 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 0.241 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.36 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 187 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 us1000ew0d Id of event.
Event Code 1000ew0d An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,ak19784310,us1000ew0d, A comma-separated list of event ids that are associated to an event.

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