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Major earthquake: M7.4 quake has struck near Perryville in Alaska

Posted by admin on July 22, 2020 0 Comments

Earthquake location 55.22S, -158.594WA major earthquake with magnitude 7.4 (ml/mb) was detected on Wednesday, 84 km SSE of Perryville, Alaska (52 miles). A tsunami warning has been issued near Perryville in Alaska (Does not indicate if a tsunami actually did or will exist). The 7.4-magnitude earthquake was detected at 06:12:44 / 6:12 am (local time epicenter). Exact time and date of event in UTC/GMT: 22/07/20 / 2020-07-22 06:12:44 / July 22, 2020 @ 6:12 am. The earthquake occurred at a depth of 13 km (8 miles) below the earth’s surface. Exact location of event, longitude -158.594 West, latitude 55.22 North, depth = 13 km. Event id: at00qdux98. Ids that are associated to the earthquake: at00qdux98.

Earthquakes 7.0 to 7.9 may cause serious damage. Each year there are an estimated 15 major earthquakes in the world. In the past 24 hours, there have been one, in the last 10 days one, in the past 30 days two and in the last 365 days thirty-four earthquakes of magnitude 3.0 or greater that have been detected in the same area.

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. 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: 84 km SSE of Perryville, Alaska.

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More information

Parameter Value Description
Magnitude 7.4 mb The magnitude for the event.
Longitude -158.594° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 55.22° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 13 km Depth of the event in kilometers.
Place 84 km SSE of Perryville, Alaska Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2020-07-22 06:12:44 Time when the event occurred. UTC/GMT
Updated 2020-07-22 06:25:15 Time when the event was most recently updated. UTC/GMT
Timezone offset Timezone offset from UTC in minutes at the event epicenter.
Felt 3 The total number of felt reports
CDI 3.1 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 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 843 A number describing how significant the event is. Larger numbers indicate a more significant event.
Network at The ID of a data contributor. Identifies the network considered to be the preferred source of information for this event.
Sources ,at, A comma-separated list of network contributors.
Number of Stations Used 135 The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance 0 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 1.41 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 143.99998848 The largest azimuthal gap between azimuthally adjacent stations (in degrees).
Magnitude Type Mi The method or algorithm used to calculate the preferred magnitude for the event.
Event Type earthquake Type of seismic event.
Event ID at00qdux98 Id of event.
Event Code 00qdux98 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,at00qdux98, A comma-separated list of event ids that are associated to an event.

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