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Minor earthquake, 3.1 mag strikes near Semisopochnoi Island in Alaska



Earthquake location 51.3437S, 179.452WA minor earthquake magnitude 3.1 (ml/mb) strikes 68 km S of Semisopochnoi Island, Alaska (42 miles) on Sunday. Unique identifier: us2000ae08. Ids that are associated to the event: ak16585085, us2000ae08. The temblor was picked up at 02:28:35 / 2:28 am (local time epicenter). The earthquake was roughly at a depth of 30.2 km (19 miles). Exact time and date of event in UTC/GMT: 20/08/17 / 2017-08-20 12:28:35 / August 20, 2017 @ 12:28 pm. Exact location of event, depth 30.2 km, 179.452° East, 51.3437° North.

Earthquakes 2.5 to 3.5 are often felt, but only causes minor damage. Each year there are an estimated 130,000 minor quakes in the world. In the past 24 hours, there have been four, in the last 10 days seven, in the past 30 days twelve and in the last 365 days one hundred and fifty-six earthquakes of magnitude 3.0 or greater that has struck near.

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. 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: 68 km S of Semisopochnoi Island, Alaska.

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More information

Parameter Value Description
Magnitude 3.1 mb The magnitude for the event.
Longitude 179.452° East Decimal degrees longitude. Negative values for western longitudes.
Latitude 51.3437° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 30.2 km Depth of the event in kilometers.
Place 68km S 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 2017-08-20 12:28:35 Time when the event occurred. UTC/GMT
Updated 2017-09-02 08:18:17 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 148 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 0.101 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.3 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 212 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 us2000ae08 Id of event.
Event Code 2000ae08 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,ak16585085,us2000ae08, A comma-separated list of event ids that are associated to an event.

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