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Minor earthquake, 3.1 mag has occurred near Semisopochnoi Island in Alaska


Earthquake location 51.998S, 179.6475WA minor earthquake with magnitude 3.1 (ml/mb) was reported 6 km NNE of Semisopochnoi Island, Alaska (4 miles) on Saturday. Exact location of event, depth 181 km, 179.6475° East, 51.998° North. Unique identifier: ak11641769. Ids that are associated to the event: ak11641769. The temblor was picked up at 15:50:50 / 3:50 pm (local time epicenter). The earthquake was roughly at a depth of 181 km (112 miles). Exact time and date of event in UTC/GMT: 05/07/15 / 2015-07-05 00:50:50 / July 5, 2015 @ 12:50 am.

Earthquakes 2.5 to 3.5 are often felt, but only causes minor damage. There are an estimated 130,000 minor earthquakes in the world each year. In the past 24 hours, there have been two, in the last 10 days two, in the past 30 days nine and in the last 365 days one hundred and fourty-nine earthquakes of magnitude 3.0 or greater that was reported nearby.

Did you feel anything?

Did objects rattle, topple over, or fall off shelves? Leave a comment or report about activity, shaking and damage at your home, country and city. This information comes from the USGS Earthquake Notification Service. Read more about the earthquake, Seismometer information, Date-Time, Location, Distances, Parameters and details about this quake, recorded: 6 km NNE of Semisopochnoi Island, Alaska.

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More information

Parameter Value Description
Magnitude 3.1 mb The magnitude for the event.
Longitude 179.6475° East Decimal degrees longitude. Negative values for western longitudes.
Latitude 51.998° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 181 km Depth of the event in kilometers.
Place 6km NNE 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 2015-07-05 00:50:50 Time when the event occurred. UTC/GMT
Updated 2015-07-08 17:35:55 Time when the event was most recently updated. UTC/GMT
Timezone offset -540 Timezone offset from UTC in minutes at the event epicenter.
Felt 0 The total number of felt reports
CDI 1 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 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 0.73 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 ak11641769 Id of event.
Event Code 11641769 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,ak11641769, A comma-separated list of event ids that are associated to an event.

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