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Light World Earthquakes Magnitude 4-4.9

Light earthquake, 4.7 mag has occurred near Georgetown in Saint Helena

Posted by admin on November 2, 2018 0 Comments

Earthquake location -7.3406S, -12.8923WA light earthquake magnitude 4.7 (ml/mb) strikes 180 km ENE of Georgetown, Saint Helena (112 miles) on Sunday. The epicenter was at a depth of 10 km (6 miles). Exact location of event, depth 10 km, -12.8923° West, -7.3406° South. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Exact time and date of earthquake 07/10/18 / 2018-10-07 08:00:31 / October 7, 2018 @ 8:00 am UTC/GMT. The temblor was reported at 07:00:31 / 7:00 am (local time epicenter). Unique identifier: us1000hb3n. Ids that are associated to the event: us1000hb3n.

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

Did you feel it?

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: 180 km ENE of Georgetown, Saint Helena.

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More information

Parameter Value Description
Magnitude 4.7 mb The magnitude for the event.
Longitude -12.8923° West Decimal degrees longitude. Negative values for western longitudes.
Latitude -7.3406° South Decimal degrees latitude. Negative values for southern latitudes.
Depth 10 km Depth of the event in kilometers.
Place 180km ENE of Georgetown, Saint Helena Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2018-10-07 08:00:31 Time when the event occurred. UTC/GMT
Updated 2018-11-02 09:03:39 Time when the event was most recently updated. UTC/GMT
Timezone offset -60 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 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 1.569 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.57 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 68 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 us1000hb3n Id of event.
Event Code 1000hb3n An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us1000hb3n, A comma-separated list of event ids that are associated to an event.

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