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Minor earthquake, 3 mag has occurred near Semisopochnoi Island in Alaska



Earthquake location 51.2012S, 179.0841WA minor earthquake with magnitude 3 (ml/mb) was detected on Wednesday, 90 km SSW of Semisopochnoi Island, Alaska (56 miles). Exact location of earthquake, 179.0841° East, 51.2012° North, depth 24.78 km. The temblor was picked up at 12:30:51 / 12:30 pm (local time epicenter). Date and time of earthquake in UTC/GMT: 15/03/17 / 2017-03-15 22:30:51 / March 15, 2017 @ 10:30 pm. Event id: us20008sle. Ids that are associated to the earthquake: ak15501492, us20008sle. The epicenter of the earthquake was roughly 24.78 km (15 miles) below the earth’s surface.

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

Questions or comments?

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 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: 90 km SSW of Semisopochnoi Island, Alaska.

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More information

Parameter Value Description
Magnitude 3 mb The magnitude for the event.
Longitude 179.0841° East Decimal degrees longitude. Negative values for western longitudes.
Latitude 51.2012° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 24.78 km Depth of the event in kilometers.
Place 90km SSW 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 2017-03-15 22:30:51 Time when the event occurred. UTC/GMT
Updated 2017-04-05 03:15:40 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 138 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 0.222 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.66 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 224 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 us20008sle Id of event.
Event Code 20008sle An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,ak15501492,us20008sle, A comma-separated list of event ids that are associated to an event.

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