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Light earthquake 4.5 mag, 72 km SW of Little Sitkin Island, Alaska

Posted by admin on August 2, 2018 0 Comments

Earthquake location 51.4299S, 177.8698WA light earthquake magnitude 4.5 (ml/mb) strikes 72 km SW of Little Sitkin Island, Alaska (45 miles) on Thursday. The epicenter of the earthquake was roughly 49.2 km (31 miles) below the earth’s surface. Unique identifier: ak20003423. Ids that are associated to the event: ak20003423. The 4.5-magnitude earthquake has occurred at 15:49:46 / 3:49 pm (local time epicenter). Exact location of event, depth 49.2 km, 177.8698° East, 51.4299° North. Global date and time of event UTC/GMT: 02/08/18 / 2018-08-02 03:49:46 / August 2, 2018 @ 3:49 am. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist).

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

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. Read more about the earthquake, Location, Distances, Seismometer information, Date-Time, Parameters and details about this quake, reported near: 72 km SW of Little Sitkin Island, Alaska. This information comes from the USGS Earthquake Notification Service.

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More information

Parameter Value Description
Magnitude 4.5 mb The magnitude for the event.
Longitude 177.8698° East Decimal degrees longitude. Negative values for western longitudes.
Latitude 51.4299° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 49.2 km Depth of the event in kilometers.
Place 72km SW 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 2018-08-02 03:49:46 Time when the event occurred. UTC/GMT
Updated 2018-08-02 19:28:30 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 312 A number describing how significant the event is. Larger numbers indicate a more significant event.
Network ak The ID of a data contributor. Identifies the network considered to be the preferred source of information for this event.
Sources ,ak, 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 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.64 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap The largest azimuthal gap between azimuthally adjacent stations (in degrees).
Magnitude Type ml The method or algorithm used to calculate the preferred magnitude for the event.
Event Type earthquake Type of seismic event.
Event ID ak20003423 Id of event.
Event Code 20003423 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,ak20003423, A comma-separated list of event ids that are associated to an event.

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