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Light earthquake: M4.6 quake has struck near Chirik

Posted by admin on December 15, 2017 0 Comments

Earthquake location 54.7681S, -156.8793WA light earthquake magnitude 4.6 (ml/mb) has struck on Thursday, 142 km SW of Chirikof Island, Alaska (88 miles). Event id: us2000c4rg. Ids that are associated to the earthquake: ak17600285, us2000c4rg. The 4.6-magnitude earthquake was detected at 22:38:49 / 10:38 pm (local time epicenter). Exact location, longitude -156.8793° West, latitude 54.7681° North, depth = 0 km. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Exact time and date of earthquake 15/12/17 / 2017-12-15 08:38:49 / December 15, 2017 @ 8:38 am UTC/GMT. The epicenter of the earthquake was roughly 0 km (0 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 three, in the last 10 days four, in the past 30 days ten and in the last 365 days thirty-one earthquakes of magnitude 3.0 or greater that have been detected in the same area. Each year there are an estimated 13,000 light quakes in the world.

Questions or comments?

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. 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: 142 km SW of Chirikof Island, Alaska.

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More information

Parameter Value Description
Magnitude 4.6 mb The magnitude for the event.
Longitude -156.8793° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 54.7681° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 0 km Depth of the event in kilometers.
Place 142km SW of Chirikof 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 2017-12-15 08:38:49 Time when the event occurred. UTC/GMT
Updated 2017-12-15 08:56:01 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 326 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 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.93 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 mb The method or algorithm used to calculate the preferred magnitude for the event.
Event Type earthquake Type of seismic event.
Event ID us2000c4rg Id of event.
Event Code 2000c4rg An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,ak17600285,us2000c4rg, A comma-separated list of event ids that are associated to an event.

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