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Light earthquake: M4 quake has struck near Semisopochnoi Island in Alaska

Posted by admin on June 21, 2018 0 Comments

Earthquake location 51.7804S, -179.8238WA light earthquake magnitude 4 (ml/mb) strikes 43 km ESE of Semisopochnoi Island, Alaska (27 miles) on Wednesday. Event ids that are associated to the earthquake: ak19789559, us1000ewyx. Id of event: us1000ewyx. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Exact location, longitude -179.8238° West, latitude 51.7804° North, depth = 106.1 km. The 4-magnitude earthquake has occurred at 12:12:20 / 12:12 pm (local time epicenter). Date and time of earthquake in UTC/GMT: 21/06/18 / 2018-06-21 00:12:20 / June 21, 2018 @ 12:12 am. The epicenter of the earthquake was roughly 106.1 km (66 miles) below the earth’s surface.

Earthquakes 4.0 to 5.0 are often felt, but only causes minor damage. In the past 24 hours, there have been two, in the last 10 days two, in the past 30 days four and in the last 365 days one hundred and fifty-five earthquakes of magnitude 3.0 or greater that has struck near. There are an estimated 13,000 light quakes in the world each year.

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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. The information in this article comes from the USGS Earthquake Notification Service. Read more about the earthquake, Seismometer information, Distances, Parameters, Date-Time, Location and details about this quake, detected near: 43 km ESE of Semisopochnoi Island, Alaska.

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More information

Parameter Value Description
Magnitude 4 mb The magnitude for the event.
Longitude -179.8238° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 51.7804° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 106.1 km Depth of the event in kilometers.
Place 43km 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 2018-06-21 00:12:20 Time when the event occurred. UTC/GMT
Updated 2018-06-21 00:41:31 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 246 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 0.371 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.71 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 144 The largest azimuthal gap between azimuthally adjacent stations (in degrees).
Magnitude Type mb The method or algorithm used to calculate the preferred magnitude for the event.
Event Type earthquake Type of seismic event.
Event ID us1000ewyx Id of event.
Event Code 1000ewyx An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,ak19789559,us1000ewyx, A comma-separated list of event ids that are associated to an event.

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