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Minor World Earthquakes Magnitude -3.9

Minor earthquake, 3.8 mag strikes near Amukta Island in Alaska

Earthquake location 50.9257S, -170.9258WA minor earthquake with magnitude 3.8 (ml/mb) was reported 175 km S of Amukta Island, Alaska (109 miles) on Friday. The 3.8-magnitude earthquake was detected at 09:15:57 / 9:15 am (local time epicenter). The earthquake occurred at a depth of 15.85 km (10 miles) below the earth’s surface. Exact location of event, depth 15.85 km, -170.9258° West, 50.9257° North. Event ids that are associated to the earthquake: ak18504660, us2000d78g. Id of event: us2000d78g. Global date and time of event UTC/GMT: 16/02/18 / 2018-02-16 20:15:57 / February 16, 2018 @ 8:15 pm.

There are an estimated 130,000 minor quakes in the world each year. Earthquakes 3.0 to 4.0 are often felt, but only causes minor damage. In the past 24 hours, there have been ten, in the last 10 days ten, in the past 30 days fourteen and in the last 365 days thirty-six earthquakes of magnitude 3.0 or greater that have been detected in the same area.

Questions or comments?

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. Read more about the earthquake, Distances, Seismometer information, Date-Time, Parameters, Location and details about this quake, that has struck: 175 km S of Amukta Island, Alaska. This data comes from the USGS Earthquake Notification Service.

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More information

Parameter Value Description
Magnitude 3.8 mb The magnitude for the event.
Longitude -170.9258° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 50.9257° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 15.85 km Depth of the event in kilometers.
Place 175km S of Amukta 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 2018-02-16 20:15:57 Time when the event occurred. UTC/GMT
Updated 2018-03-16 17:12:41 Time when the event was most recently updated. UTC/GMT
Timezone offset -660 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 222 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 ,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 2.408 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 222 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 us2000d78g Id of event.
Event Code 2000d78g An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,ak18504660,us2000d78g, A comma-separated list of event ids that are associated to an event.

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