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Light earthquake: M4.2 quake has struck near Semisopochnoi Island in Alaska

Posted by admin on September 28, 2018 0 Comments

Earthquake location 51.0697S, 179.3626WA light earthquake magnitude 4.2 (ml/mb) strikes 99 km S of Semisopochnoi Island, Alaska (62 miles) on Saturday. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Global date and time of event UTC/GMT: 28/09/18 / 2018-09-28 20:04:54 / September 28, 2018 @ 8:04 pm. The temblor was reported at 08:04:54 / 8:04 am (local time epicenter). Event id: us1000h405. Ids that are associated to the earthquake: ak20266394, us1000h405. The epicenter was at a depth of 31.33 km (19 miles). Exact location of earthquake, longitude 179.3626 East, latitude 51.0697 North, depth = 31.33 km.

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

Did you feel anything?

How did you respond? Did any furniture slide, topple over, or become displaced? Leave a comment or report about activity, shaking 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: 99 km S of Semisopochnoi Island, Alaska. This data comes from the USGS Earthquake Notification Service.

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More information

Parameter Value Description
Magnitude 4.2 mb The magnitude for the event.
Longitude 179.3626° East Decimal degrees longitude. Negative values for western longitudes.
Latitude 51.0697° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 31.33 km Depth of the event in kilometers.
Place 99km S 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 2018-09-28 20:04:54 Time when the event occurred. UTC/GMT
Updated 2018-09-28 21:09:44 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 271 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 0.31 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.83 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 126 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 us1000h405 Id of event.
Event Code 1000h405 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,ak20266394,us1000h405, A comma-separated list of event ids that are associated to an event.

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