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Minor earthquake: M2.8 quake has struck near Chirik



Earthquake location 54.6698S, -156.7276WA minor earthquake magnitude 2.8 (ml/mb) strikes 146 km SSW of Chirikof Island, Alaska (91 miles) on Wednesday. The temblor was reported at 03:17:27 / 3:17 am (local time epicenter). Exact location of event, longitude -156.7276 West, latitude 54.6698 North, depth = 5.6 km. Id of earthquake: ak11756054. Event ids that are associated: ak11756054. Exact time and date of event in UTC/GMT: 21/10/15 / 2015-10-21 13:17:27 / October 21, 2015 @ 1:17 pm. The epicenter was at a depth of 5.6 km (3 miles).

Each year there are an estimated 1,300,000 minor quakes in the world. Earthquakes 2.5 to 2.9 are often felt, but only causes minor damage. In the past 24 hours, there have been 0, in the last 10 days 0, in the past 30 days two and in the last 365 days ten earthquakes of magnitude 3.0 or greater that have been detected in the same area.

Did you feel the quake?

What was your situation during the earthquake? Leave a comment or report about damage, shaking and activity at your home, city and country. Read more about the earthquake, Distances, Seismometer information, Date-Time, Parameters, Location and details about this quake, that has struck: 146 km SSW of Chirikof Island, Alaska. This data comes from the USGS Earthquake Notification Service.

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More information

Parameter Value Description
Magnitude 2.8 mb The magnitude for the event.
Longitude -156.7276° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 54.6698° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 5.6 km Depth of the event in kilometers.
Place 146km SSW of Chirikof 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 2015-10-21 13:17:27 Time when the event occurred. UTC/GMT
Updated 2015-10-28 00:14:44 Time when the event was most recently updated. UTC/GMT
Timezone offset -600 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 121 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 0.43 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 ak11756054 Id of event.
Event Code 11756054 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,ak11756054, A comma-separated list of event ids that are associated to an event.

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