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Minor earthquake, 3.3 mag has occurred near Semisopochnoi Island in Alaska


Earthquake location 52.1082S, 179.8599WA minor earthquake magnitude 3.3 (ml/mb) has occurred on Monday, 24 km NE of Semisopochnoi Island, Alaska (15 miles). The temblor was picked up at 22:25:49 / 10:25 pm (local time epicenter). Exact location of event, longitude 179.8599 East, latitude 52.1082 North, depth = 189.9 km. The epicenter was at a depth of 189.9 km (118 miles). Global date and time of event UTC/GMT: 10/10/17 / 2017-10-10 08:25:49 / October 10, 2017 @ 8:25 am. All ids that are associated to the event: ak17003836. Unique identifier: ak17003836.

In the past 24 hours, there have been one, in the last 10 days three, in the past 30 days four and in the last 365 days eighty-four 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. Each year there are an estimated 130,000 minor quakes in the world.

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. Read more about the earthquake, Location, Distances, Seismometer information, Date-Time, Parameters and details about this quake, reported near: 24 km NE of Semisopochnoi Island, Alaska. This information comes from the USGS Earthquake Notification Service.

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More information

Parameter Value Description
Magnitude 3.3 mb The magnitude for the event.
Longitude 179.8599° East Decimal degrees longitude. Negative values for western longitudes.
Latitude 52.1082° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 189.9 km Depth of the event in kilometers.
Place 24km NE 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 2017-10-10 08:25:49 Time when the event occurred. UTC/GMT
Updated 2017-10-14 00:52:38 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 168 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 0.4 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 ak17003836 Id of event.
Event Code 17003836 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,ak17003836, A comma-separated list of event ids that are associated to an event.

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