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Minor World Earthquakes Magnitude -3.9

Minor earthquake, 3.9 mag was detected near Amukta Island in Alaska

Earthquake location 50.8771S, -171.063WA minor earthquake magnitude 3.9 (ml/mb) strikes 179 km S of Amukta Island, Alaska (111 miles) on Wednesday. Exact location of earthquake, longitude -171.063 West, latitude 50.8771 North, depth = 15.17 km. The temblor was reported at 08:40:33 / 8:40 am (local time epicenter). The earthquake occurred at a depth of 15.17 km (9 miles) below the earth’s surface. Id of earthquake: us1000d156. Event ids that are associated: ak18616449, us1000d156. Date and time of earthquake in UTC/GMT: 28/02/18 / 2018-02-28 19:40:33 / February 28, 2018 @ 7:40 pm.

Each year there are an estimated 130,000 minor earthquakes in the world. Earthquakes 3.0 to 4.0 are often felt, but only causes minor damage. In the past 24 hours, there have been eleven, in the last 10 days eleven, in the past 30 days eighteen and in the last 365 days fourty-one earthquakes of magnitude 3.0 or greater that was reported nearby.

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. This data comes from the USGS Earthquake Notification Service. Read more about the earthquake, Seismometer information, Distances, Parameters, Date-Time, Location and details about this quake, that has occurred near: 179 km S of Amukta Island, Alaska.

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More information

Parameter Value Description
Magnitude 3.9 mb The magnitude for the event.
Longitude -171.063° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 50.8771° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 15.17 km Depth of the event in kilometers.
Place 179km 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 2018-02-28 19:40:33 Time when the event occurred. UTC/GMT
Updated 2018-03-29 17:51:47 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 234 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 2.079 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.9 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 230 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 us1000d156 Id of event.
Event Code 1000d156 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,ak18616449,us1000d156, A comma-separated list of event ids that are associated to an event.

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