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Light World Earthquakes Magnitude 4-4.9

Light earthquake, 4.2 mag was detected near Perryville in Alaska


Earthquake location 55.2222S, -157.8979WA light earthquake with magnitude 4.2 (ml/mb) was detected on Monday, 109 km SE of Perryville, Alaska (68 miles). A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Exact location of earthquake, -157.8979° West, 55.2222° North, depth 29.6 km. Global date and time of event UTC/GMT: 11/01/21 / 2021-01-11 21:17:07 / January 11, 2021 @ 9:17 pm. Unique identifier: ak021ijikwj. Ids that are associated to the event: ak021ijikwj. The temblor was picked up at 21:17:07 / 9:17 pm (local time epicenter). The earthquake occurred at a depth of 29.6 km (18 miles).

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

Did you feel it?

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: 109 km SE of Perryville, Alaska.

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More information

Parameter Value Description
Magnitude 4.2 mb The magnitude for the event.
Longitude -157.8979° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 55.2222° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 29.6 km Depth of the event in kilometers.
Place 109 km SE of Perryville, Alaska Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2021-01-11 21:17:07 Time when the event occurred. UTC/GMT
Updated 2021-02-02 19:50:36 Time when the event was most recently updated. UTC/GMT
Timezone offset 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 ak The ID of a data contributor. Identifies the network considered to be the preferred source of information for this event.
Sources ,ak, 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 0.69 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 ml The method or algorithm used to calculate the preferred magnitude for the event.
Event Type earthquake Type of seismic event.
Event ID ak021ijikwj Id of event.
Event Code 021ijikwj An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,ak021ijikwj, A comma-separated list of event ids that are associated to an event.

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