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Minor earthquake, 3.3 mag has occurred near Tanaga Volcano in Alaska


Earthquake location 51.646S, -178.4541WA minor earthquake magnitude 3.3 (ml/mb) has occurred on Sunday, 34 km SW of Tanaga Volcano, Alaska (21 miles). The epicenter was at a depth of 18.87 km (12 miles). Unique identifier: us1000gcc3. Ids that are associated to the event: ak20086038, us1000gcc3. Exact location of event, longitude -178.4541 West, latitude 51.646 North, depth = 18.87 km. The 3.3-magnitude earthquake has occurred at 13:30:33 / 1:30 pm (local time epicenter). Global time and date of event 12/08/18 / 2018-08-12 23:30:33 / August 12, 2018 @ 11:30 pm UTC/GMT.

Each year there are an estimated 130,000 minor earthquakes in the world. In the past 24 hours, there have been sixteen, in the last 10 days twenty-six, in the past 30 days thirty-three and in the last 365 days two hundred and twenty-two earthquakes of magnitude 3.0 or greater that have been detected nearby. Earthquakes 2.5 to 3.5 are often felt, but only causes minor damage.

Questions or comments?

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 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: 34 km SW of Tanaga Volcano, Alaska.

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More information

Parameter Value Description
Magnitude 3.3 mb The magnitude for the event.
Longitude -178.4541° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 51.646° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 18.87 km Depth of the event in kilometers.
Place 34km SW of Tanaga Volcano, Alaska Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2018-08-12 23:30:33 Time when the event occurred. UTC/GMT
Updated 2018-08-26 21:33:48 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 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 0.228 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.19 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 183 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 us1000gcc3 Id of event.
Event Code 1000gcc3 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,ak20086038,us1000gcc3, A comma-separated list of event ids that are associated to an event.

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