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Minor World Earthquakes Magnitude -3.9

Minor earthquake, 3.9 mag has occurred near Little Sitkin Island in Alaska


Earthquake location 51.8455S, 178.4564WA minor earthquake with magnitude 3.9 (ml/mb) was reported 11 km SSW of Little Sitkin Island, Alaska (7 miles) on Sunday. The epicenter was at a depth of 114.62 km (71 miles). The 3.9-magnitude earthquake has occurred at 10:14:23 / 10:14 am (local time epicenter). Date and time of earthquake in UTC/GMT: 22/04/18 / 2018-04-22 20:14:23 / April 22, 2018 @ 8:14 pm. Exact location, longitude 178.4564° East, latitude 51.8455° North, depth = 114.62 km. Event id: us1000ds9r. Ids that are associated to the earthquake: ak19253909, us1000ds9r.

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

Did you feel it?

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, Location, Distances, Seismometer information, Date-Time, Parameters and details about this quake, reported near: 11 km SSW of Little Sitkin Island, Alaska. This information comes from the USGS Earthquake Notification Service.

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More information

Parameter Value Description
Magnitude 3.9 mb The magnitude for the event.
Longitude 178.4564° East Decimal degrees longitude. Negative values for western longitudes.
Latitude 51.8455° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 114.62 km Depth of the event in kilometers.
Place 11km SSW 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 2018-04-22 20:14:23 Time when the event occurred. UTC/GMT
Updated 2018-05-20 16:47:38 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 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 0.108 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 1.18 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 152 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 us1000ds9r Id of event.
Event Code 1000ds9r An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,ak19253909,us1000ds9r, A comma-separated list of event ids that are associated to an event.

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