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Light earthquake: M4.7 quake has struck near Sand Point in Alaska

Posted by admin on December 21, 2020 0 Comments

Earthquake location 54.8375S, -160.2733WA light earthquake magnitude 4.7 (ml/mb) strikes 57 km SSE of Sand Point, Alaska (35 miles) on Monday. Unique identifier: us7000csxc. Ids that are associated to the event: us7000csxc. Exact time and date of earthquake 21/12/20 / 2020-12-21 11:57:48 / December 21, 2020 @ 11:57 am UTC/GMT. Exact location of event, depth 49.61 km, -160.2733° West, 54.8375° North. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). The epicenter of the earthquake was roughly 49.61 km (31 miles) below the earth’s surface. The temblor was detected at 11:57:48 / 11:57 am (local time epicenter).

In the past 24 hours, there have been two, in the last 10 days twelve, in the past 30 days eighty-three and in the last 365 days one thousand, two hundred and seventy-eight earthquakes of magnitude 3.0 or greater that was reported nearby. Earthquakes 4.0 to 5.0 are often felt, but only causes minor damage. There are an estimated 13,000 light quakes in the world each year.

Questions or comments?

How did you react? Was there any damage to buildings? Leave a comment or report about shaking, activity and damage at your home, city and country. This data comes from the USGS Earthquake Notification Service. Read more about the earthquake, Seismometer information, Distances, Parameters, Date-Time, Location and details about this quake, that has occurred near: 57 km SSE of Sand Point, Alaska.

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More information

Parameter Value Description
Magnitude 4.7 mb The magnitude for the event.
Longitude -160.2733° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 54.8375° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 49.61 km Depth of the event in kilometers.
Place 57 km SSE of Sand Point, Alaska Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2020-12-21 11:57:48 Time when the event occurred. UTC/GMT
Updated 2020-12-21 12:12:32 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 340 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 ,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 0.395 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.74 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 120 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 us7000csxc Id of event.
Event Code 7000csxc An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us7000csxc, A comma-separated list of event ids that are associated to an event.

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