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Light World Earthquakes Magnitude 4-4.9

Light earthquake 4.7 mag, 74 km NNW of Visokoi Island, South Georgia and the South Sandwich Islands


Earthquake location -56.0829S, -27.6847WA light earthquake with magnitude 4.7 (ml/mb) was reported 74 km NNW of Visokoi Island, South Georgia and the South Sandwich Islands (46 miles) on Wednesday. The 4.7-magnitude earthquake was detected at 13:29:20 / 1:29 pm (local time epicenter). Exact location of event, longitude -27.6847 West, latitude -56.0829 South, depth = 111.67 km. The earthquake occurred at a depth of 111.67 km (69 miles) below the earth’s surface. All ids that are associated to the event: us100035qy. Unique identifier: us100035qy. Global date and time of event UTC/GMT: 12/08/15 / 2015-08-12 15:29:20 / August 12, 2015 @ 3:29 pm. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist).

There are an estimated 13,000 light earthquakes in the world each year. Earthquakes 4.0 to 5.0 are often felt, but only causes minor damage. In the past 24 hours, there have been two, in the last 10 days three, in the past 30 days ten and in the last 365 days fifty-seven earthquakes of magnitude 3.0 or greater that have been detected nearby.

Questions or comments?

What was your situation during the earthquake? Leave a comment or report about damage, shaking and activity at your home, city 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: 74 km NNW of Visokoi Island, South Georgia and the South Sandwich Islands.

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More information

Parameter Value Description
Magnitude 4.7 mb The magnitude for the event.
Longitude -27.6847° West Decimal degrees longitude. Negative values for western longitudes.
Latitude -56.0829° South Decimal degrees latitude. Negative values for southern latitudes.
Depth 111.67 km Depth of the event in kilometers.
Place 74km NNW of Visokoi Island, South Georgia and the South Sandwich Islands Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2015-08-12 15:29:20 Time when the event occurred. UTC/GMT
Updated 2015-09-01 01:38:27 Time when the event was most recently updated. UTC/GMT
Timezone offset -120 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 340 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 ,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 5.356 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 62 The largest azimuthal gap between azimuthally adjacent stations (in degrees).
Magnitude Type mb The method or algorithm used to calculate the preferred magnitude for the event.
Event Type earthquake Type of seismic event.
Event ID us100035qy Id of event.
Event Code 100035qy An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us100035qy, A comma-separated list of event ids that are associated to an event.

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