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Light earthquake, 4 mag has occurred near Semisopochnoi Island in Alaska

Posted by admin on April 17, 2020 0 Comments

Earthquake location 52.0065S, 179.2614WA light earthquake magnitude 4 (ml/mb) has occurred on Friday, 24 km WNW of Semisopochnoi Island, Alaska (15 miles). The temblor was reported at 00:50:53 / 12:50 am (local time epicenter). Global date and time of event UTC/GMT: 17/04/20 / 2020-04-17 10:50:53 / April 17, 2020 @ 10:50 am. Exact location of event, longitude 179.2614 East, latitude 52.0065 North, depth = 164 km. The earthquake occurred at a depth of 164 km (102 miles). Event id: us70008yey. Ids that are associated to the earthquake: us70008yey. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist).

In the past 24 hours, there have been two, in the last 10 days three, in the past 30 days six and in the last 365 days ninety-one earthquakes of magnitude 3.0 or greater that has occurred nearby. Each 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?

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: 24 km WNW of Semisopochnoi Island, Alaska.

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More information

Parameter Value Description
Magnitude 4 mb The magnitude for the event.
Longitude 179.2614° East Decimal degrees longitude. Negative values for western longitudes.
Latitude 52.0065° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 164 km Depth of the event in kilometers.
Place 24km WNW of Semisopochnoi 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 2020-04-17 10:50:53 Time when the event occurred. UTC/GMT
Updated 2020-04-17 14:35:35 Time when the event was most recently updated. UTC/GMT
Timezone offset -600 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 246 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 0.63 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.78 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 85 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 us70008yey Id of event.
Event Code 70008yey An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us70008yey, A comma-separated list of event ids that are associated to an event.

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