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Light earthquake 4.4 mag, 52 km SSW of Sitka, Alaska

Earthquake location 56.6481S, -135.7767WA light earthquake magnitude 4.4 (ml/mb) strikes 52 kilometers (32 miles) from Sitka in Alaska on Monday. Event id: ak020f2thkhg. Ids that are associated to the earthquake: ak020f2thkhg, at00qk9sp6. A tsunami warning has been issued near Sitka in Alaska (Does not indicate if a tsunami actually did or will exist). The epicenter of the earthquake was roughly 10.9 km (7 miles) below the earth’s surface. The 4.4-magnitude earthquake has occurred at 22:19:55 / 10:19 pm (local time epicenter). Exact location of earthquake, -135.7767° West, 56.6481° North, depth 10.9 km. Global date and time of event UTC/GMT: 23/11/20 / 2020-11-23 22:19:55 / November 23, 2020 @ 10:19 pm.

Epicenter of the event was 53 km (33 miles) from Sitka (c. 8 900 pop). Nearest cities/city/villages to epicentrum/hypocenter was Sitka (min 5000 pop). Country/countries that might be effected, United States (c. 310 233 000 pop).

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

Questions or comments?

What was your situation during the earthquake? Leave a comment or report about damage, shaking and activity 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: 52 km SSW of Sitka, Alaska.

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More information

Parameter Value Description
Magnitude 4.4 mb The magnitude for the event.
Longitude -135.7767° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 56.6481° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 10.9 km Depth of the event in kilometers.
Place 52 km SSW of Sitka, Alaska Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2020-11-23 22:19:55 Time when the event occurred. UTC/GMT
Updated 2020-11-23 22:27:43 Time when the event was most recently updated. UTC/GMT
Timezone offset Timezone offset from UTC in minutes at the event epicenter.
Felt 1 The total number of felt reports
CDI 2.7 The maximum reported intensity for the event.
MMI 2.92 The maximum estimated instrumental intensity for the event.
Alert Level green The alert level from the PAGER earthquake impact scale. Green, Yellow, Orange or Red.
Review Status automatic Indicates whether the event has been reviewed by a human.
Tsunami 1 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 298 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,at, 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 0.66 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 ak020f2thkhg Id of event.
Event Code 020f2thkhg An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,ak020f2thkhg,at00qk9sp6, A comma-separated list of event ids that are associated to an event.

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