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Minor earthquake 3.1 mag, 56 km WSW of Chignik Lake, Alaska



Earthquake location 56.1508S, -159.6504WA minor earthquake magnitude 3.1 (ml/mb) has struck on Tuesday, 56 km WSW of Chignik Lake, Alaska (35 miles). Date and time of earthquake in UTC/GMT: 18/10/16 / 2016-10-18 13:38:47 / October 18, 2016 @ 1:38 pm. The temblor was picked up at 05:38:47 / 5:38 am (local time epicenter). The epicenter was at a depth of 139.8 km (87 miles). Unique identifier: us20007g4q. Ids that are associated to the event: ak14256668, us20007g4q. Exact location of earthquake, longitude -159.6504 West, latitude 56.1508 North, depth = 139.8 km.

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

Did you feel the quake?

Were you asleep? Was it difficult to stand and/or walk? Leave a comment or report about shaking, activity and damage at your city, home and country. 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: 56 km WSW of Chignik Lake, Alaska.

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More information

Parameter Value Description
Magnitude 3.1 mb The magnitude for the event.
Longitude -159.6504° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 56.1508° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 139.8 km Depth of the event in kilometers.
Place 56km WSW of Chignik Lake, Alaska Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2016-10-18 13:38:47 Time when the event occurred. UTC/GMT
Updated 2016-11-02 14:03:06 Time when the event was most recently updated. UTC/GMT
Timezone offset -480 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 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.76 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 136 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 us20007g4q Id of event.
Event Code 20007g4q An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,ak14256668,us20007g4q, A comma-separated list of event ids that are associated to an event.

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