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Moderate earthquake, 5 mag was detected near Semisopochnoi Island in Alaska

Posted by admin on June 21, 2017 0 Comments

Earthquake location 52.1817S, 179.4224WA moderate earthquake with magnitude 5 (ml/mb) was reported 28 km NNW of Semisopochnoi Island, Alaska (17 miles) on Wednesday. Unique identifier: us20009nwi. Ids that are associated to the event: at00orwwe2, ak16210866, us20009nwi. A tsunami warning has been issued near Semisopochnoi Island in Alaska (Does not indicate if a tsunami actually did or will exist). Exact location of event, longitude 179.4224 East, latitude 52.1817 North, depth = 155.83 km. Global date and time of event UTC/GMT: 21/06/17 / 2017-06-21 19:20:27 / June 21, 2017 @ 7:20 pm. The earthquake was roughly at a depth of 155.83 km (97 miles). The 5-magnitude earthquake has occurred at 09:20:27 / 9:20 am (local time epicenter).

Each year there are an estimated 1320 moderate quakes in the world. In the past 24 hours, there have been two, in the last 10 days four, in the past 30 days nine and in the last 365 days ninety-seven earthquakes of magnitude 3.0 or greater that have been detected nearby. Earthquakes 5.0 to 6.0 may cause light damage to buildings and other structures.

Did you feel anything?

How did you react? Was there any damage to buildings? Leave a comment or report about shaking, activity and damage 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: 28 km NNW of Semisopochnoi Island, Alaska.

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More information

Parameter Value Description
Magnitude 5 mb The magnitude for the event.
Longitude 179.4224° East Decimal degrees longitude. Negative values for western longitudes.
Latitude 52.1817° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 155.83 km Depth of the event in kilometers.
Place 28km NNW 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 2017-06-21 19:20:27 Time when the event occurred. UTC/GMT
Updated 2017-06-21 19:42:44 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 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 385 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 ,at,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 0.809 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.91 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 88 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 us20009nwi Id of event.
Event Code 20009nwi An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,at00orwwe2,ak16210866,us20009nwi, A comma-separated list of event ids that are associated to an event.

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