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Light earthquake: M4.2 quake has struck near Amatignak Island in Alaska

Posted by admin on April 16, 2019 0 Comments

Earthquake location 50.9211S, -179.2901WA light earthquake magnitude 4.2 (ml/mb) has occurred on Tuesday, 40 km SSW of Amatignak Island, Alaska (25 miles). Exact location of event, depth 35 km, -179.2901° West, 50.9211° North. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). The earthquake occurred at a depth of 35 km (22 miles) below the earth’s surface. Event ids that are associated to the earthquake: us700037fm. Id of event: us700037fm. The 4.2-magnitude earthquake has occurred at 09:31:02 / 9:31 am (local time epicenter). Global date and time of event UTC/GMT: 16/04/19 / 2019-04-16 21:31:02 / April 16, 2019 @ 9:31 pm.

There are an estimated 13,000 light quakes in the world each year. In the past 24 hours, there have been one, in the last 10 days three, in the past 30 days five and in the last 365 days one hundred and thirty-four earthquakes of magnitude 3.0 or greater that have been detected in the same area. Earthquakes 4.0 to 5.0 are often felt, but only causes minor damage.

Questions or comments?

Were you asleep? Was it difficult to stand and/or walk? Leave a comment or report about shaking, activity and damage at your city, home 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: 40 km SSW of Amatignak Island, Alaska.

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More information

Parameter Value Description
Magnitude 4.2 mb The magnitude for the event.
Longitude -179.2901° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 50.9211° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 35 km Depth of the event in kilometers.
Place 40km SSW of Amatignak 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 2019-04-16 21:31:02 Time when the event occurred. UTC/GMT
Updated 2019-04-16 22:45:27 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 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 ,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 1.631 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 1.23 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 216 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 us700037fm Id of event.
Event Code 700037fm An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us700037fm, A comma-separated list of event ids that are associated to an event.

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