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Light earthquake: M4.7 quake has struck near Little Sitkin Island in Alaska

Posted by admin on September 21, 2019 0 Comments

Earthquake location 51.1023S, 179.0374WA light earthquake with magnitude 4.7 (ml/mb) was detected on Sunday, 101 km SSE of Little Sitkin Island, Alaska (63 miles). Exact location of event, longitude 179.0374 East, latitude 51.1023 North, depth = 28.81 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: 21/09/19 / 2019-09-21 23:00:46 / September 21, 2019 @ 11:00 pm. The temblor was reported at 11:00:46 / 11:00 am (local time epicenter). All ids that are associated to the event: us60005lv9. Unique identifier: us60005lv9. The epicenter of the earthquake was roughly 28.81 km (18 miles) below the earth’s surface.

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

Questions or comments?

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. 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: 101 km SSE of Little Sitkin Island, Alaska.

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More information

Parameter Value Description
Magnitude 4.7 mb The magnitude for the event.
Longitude 179.0374° East Decimal degrees longitude. Negative values for western longitudes.
Latitude 51.1023° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 28.81 km Depth of the event in kilometers.
Place 101km SSE of Little Sitkin Island, Alaska Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2019-09-21 23:00:46 Time when the event occurred. UTC/GMT
Updated 2019-09-21 23:19:59 Time when the event was most recently updated. UTC/GMT
Timezone offset 720 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 0.32 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.94 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 162 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 us60005lv9 Id of event.
Event Code 60005lv9 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us60005lv9, A comma-separated list of event ids that are associated to an event.

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