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Light World Earthquakes Magnitude 4-4.9

Light earthquake 4.6 mag, 141 km NE of Georgetown, Saint Helena

Posted by admin on September 25, 2017 0 Comments

Earthquake location -7.0342S, -13.5059WA light earthquake with magnitude 4.6 (ml/mb) was detected on Sunday, 141 km NE of Georgetown, Saint Helena (88 miles). The earthquake was roughly at a depth of 10 km (6 miles). The 4.6-magnitude earthquake was detected at 08:21:31 / 8:21 am (local time epicenter). Exact location, longitude -13.5059° West, latitude -7.0342° South, depth = 10 km. Id of earthquake: us2000at65. Event ids that are associated: us2000at65. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Date and time of earthquake in UTC/GMT: 17/09/17 / 2017-09-17 09:21:31 / September 17, 2017 @ 9:21 am.

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

How would you describe the shaking?

What was your situation during the earthquake? Leave a comment or report about damage, shaking and activity at your home, city and country. Read more about the earthquake, Location, Distances, Seismometer information, Date-Time, Parameters and details about this quake, reported near: 141 km NE of Georgetown, Saint Helena. This information comes from the USGS Earthquake Notification Service.

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More information

Parameter Value Description
Magnitude 4.6 mb The magnitude for the event.
Longitude -13.5059° West Decimal degrees longitude. Negative values for western longitudes.
Latitude -7.0342° South Decimal degrees latitude. Negative values for southern latitudes.
Depth 10 km Depth of the event in kilometers.
Place 141km NE 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 2017-09-17 09:21:31 Time when the event occurred. UTC/GMT
Updated 2017-09-25 11:27:50 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 326 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 1.23 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 1.17 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 160 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 us2000at65 Id of event.
Event Code 2000at65 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us2000at65, A comma-separated list of event ids that are associated to an event.

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