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Minor earthquake, 3.4 mag has occurred near Semisopochnoi Island in Alaska


Earthquake location 51.3945S, 179.8017WA minor earthquake magnitude 3.4 (ml/mb) strikes 63 km SSE of Semisopochnoi Island, Alaska (39 miles) on Friday. The 3.4-magnitude earthquake was detected at 14:47:07 / 2:47 pm (local time epicenter). Exact location of earthquake, 179.8017° East, 51.3945° North, depth 56.61 km. Unique identifier: us60009bg4. Ids that are associated to the event: ak0204ynifsc, us60009bg4. The epicenter was at a depth of 56.61 km (35 miles). Exact time and date of earthquake 17/04/20 / 2020-04-17 02:47:07 / April 17, 2020 @ 2:47 am UTC/GMT.

Earthquakes 2.5 to 3.5 are often felt, but only causes minor damage. In the past 24 hours, there have been seven, in the last 10 days seven, in the past 30 days ten and in the last 365 days eighty-two earthquakes of magnitude 3.0 or greater that has struck near. Every year there are an estimated 130,000 minor earthquakes in the world.

Did you feel the quake?

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 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: 63 km SSE of Semisopochnoi Island, Alaska.

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More information

Parameter Value Description
Magnitude 3.4 mb The magnitude for the event.
Longitude 179.8017° East Decimal degrees longitude. Negative values for western longitudes.
Latitude 51.3945° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 56.61 km Depth of the event in kilometers.
Place 63km SSE 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 2020-04-17 02:47:07 Time when the event occurred. UTC/GMT
Updated 2020-04-24 20:50:37 Time when the event was most recently updated. UTC/GMT
Timezone offset 720 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 178 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 0.314 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.16 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 188 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 us60009bg4 Id of event.
Event Code 60009bg4 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,ak0204ynifsc,us60009bg4, A comma-separated list of event ids that are associated to an event.

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