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Light World Earthquakes Magnitude 4-4.9

Light earthquake: M4.2 quake has struck near Alaska


Earthquake location 54.2602S, -159.5634WA light earthquake magnitude 4.2 (ml/mb) strikes south of Alaska (0 miles) on Tuesday. The 4.2-magnitude earthquake was detected at 01:36:36 / 1:36 am (local time epicenter). Unique identifier: us6000cc4t. Ids that are associated to the event: ak020di8t9ff, us6000cc4t. The epicenter was at a depth of 20.3 km (13 miles). Exact location of event, longitude -159.5634 West, latitude 54.2602 North, depth = 20.3 km. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Date and time of earthquake in UTC/GMT: 20/10/20 / 2020-10-20 01:36:36 / October 20, 2020 @ 1:36 am.

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. In the past 24 hours, there have been five hundred and seventy-eight, in the last 10 days five hundred and seventy-eight, in the past 30 days five hundred and ninety-five and in the last 365 days eight hundred and sixty earthquakes of magnitude 3.0 or greater that has occurred nearby.

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. Read more about the earthquake, Distances, Seismometer information, Date-Time, Parameters, Location and details about this quake, that has struck: south of Alaska. This data comes from the USGS Earthquake Notification Service.

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More information

Parameter Value Description
Magnitude 4.2 mb The magnitude for the event.
Longitude -159.5634° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 54.2602° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 20.3 km Depth of the event in kilometers.
Place south of Alaska Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2020-10-20 01:36:36 Time when the event occurred. UTC/GMT
Updated 2020-11-10 00:11:20 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 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 0.572 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.68 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 158 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 us6000cc4t Id of event.
Event Code 6000cc4t An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,ak020di8t9ff,us6000cc4t, A comma-separated list of event ids that are associated to an event.

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