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Minor earthquake, 2.8 mag has occurred near Semisopochnoi Island in Alaska



Earthquake location 51.3031S, 179.7936WA minor earthquake magnitude 2.8 (ml/mb) has occurred on Sunday, 73 km S of Semisopochnoi Island, Alaska (45 miles). The epicenter of the earthquake was roughly 44.4 km (28 miles) below the earth’s surface. The 2.8-magnitude earthquake has occurred at 14:13:25 / 2:13 pm (local time epicenter). Exact time and date of event in UTC/GMT: 09/07/17 / 2017-07-09 02:13:25 / July 9, 2017 @ 2:13 am. Exact location, longitude 179.7936° East, latitude 51.3031° North, depth = 44.4 km. Id of earthquake: ak16303652. Event ids that are associated: ak16303652.

Every year there are an estimated 1,300,000 minor earthquakes 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 four, in the last 10 days six, in the past 30 days twelve and in the last 365 days one hundred and thirty-two earthquakes of magnitude 3.0 or greater that has struck near.

How would you describe the shaking?

How did you respond? Did any furniture slide, topple over, or become displaced? Leave a comment or report about activity, shaking and damage at your home, city and country. The information in this article comes from the USGS Earthquake Notification Service. Read more about the earthquake, Seismometer information, Distances, Parameters, Date-Time, Location and details about this quake, detected near: 73 km S of Semisopochnoi Island, Alaska.

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More information

Parameter Value Description
Magnitude 2.8 mb The magnitude for the event.
Longitude 179.7936° East Decimal degrees longitude. Negative values for western longitudes.
Latitude 51.3031° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 44.4 km Depth of the event in kilometers.
Place 73km S 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 2017-07-09 02:13:25 Time when the event occurred. UTC/GMT
Updated 2017-07-27 22:30:58 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 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 0.17 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 ak16303652 Id of event.
Event Code 16303652 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,ak16303652, A comma-separated list of event ids that are associated to an event.

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