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Light World Earthquakes Magnitude 4-4.9

Light earthquake, 4 mag has occurred near Adak in Alaska

Posted by admin on December 25, 2018 0 Comments

Earthquake location 51.8217S, -176.3783WA light earthquake magnitude 4 (ml/mb) has struck on Thursday, 20 km ESE of Adak, Alaska (12 miles). Exact location, longitude -176.3783° West, latitude 51.8217° North, depth = 74.99 km. Event ids that are associated to the earthquake: ak20451911, us1000i3us. Id of event: us1000i3us. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). The epicenter was at a depth of 74.99 km (47 miles). The temblor was picked up at 07:08:19 / 7:08 am (local time epicenter). Date and time of earthquake in UTC/GMT: 06/12/18 / 2018-12-06 17:08:19 / December 6, 2018 @ 5:08 pm.

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 three, in the past 30 days seven and in the last 365 days one hundred and twenty earthquakes of magnitude 3.0 or greater that have been detected nearby. There are an estimated 13,000 light quakes in the world each year.

How would you describe the shaking?

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. 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: 20 km ESE of Adak, Alaska.

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More information

Parameter Value Description
Magnitude 4 mb The magnitude for the event.
Longitude -176.3783° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 51.8217° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 74.99 km Depth of the event in kilometers.
Place 20km ESE of Adak, Alaska Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2018-12-06 17:08:19 Time when the event occurred. UTC/GMT
Updated 2018-12-25 19:13:37 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 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 0.199 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.87 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 196 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 us1000i3us Id of event.
Event Code 1000i3us An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,ak20451911,us1000i3us, A comma-separated list of event ids that are associated to an event.

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