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Light World Earthquakes Magnitude 4-4.9

Light earthquake, 4.1 mag has occurred near Nuku`alofa in Tonga

Posted by admin on December 3, 2018 0 Comments

Earthquake location -20.2644S, -176.1877WA light earthquake magnitude 4.1 (ml/mb) has struck on Sunday, 140 km NW of Nuku`alofa, Tonga (87 miles). The epicenter was at a depth of 550.05 km (342 miles). Exact location, longitude -176.1877° West, latitude -20.2644° South, depth = 550.05 km. Event id: us1000hpvg. Ids that are associated to the earthquake: us1000hpvg. The 4.1-magnitude earthquake was detected at 07:46:07 / 7:46 am (local time epicenter). 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: 04/11/18 / 2018-11-04 19:46:07 / November 4, 2018 @ 7:46 pm.

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

Questions or comments?

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. This data comes from the USGS Earthquake Notification Service. Read more about the earthquake, Seismometer information, Distances, Parameters, Date-Time, Location and details about this quake, that has occurred near: 140 km NW of Nuku`alofa, Tonga.

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More information

Parameter Value Description
Magnitude 4.1 mb The magnitude for the event.
Longitude -176.1877° West Decimal degrees longitude. Negative values for western longitudes.
Latitude -20.2644° South Decimal degrees latitude. Negative values for southern latitudes.
Depth 550.05 km Depth of the event in kilometers.
Place 140km NW of Nuku`alofa, Tonga Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2018-11-04 19:46:07 Time when the event occurred. UTC/GMT
Updated 2018-12-03 18:18:36 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 259 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 5.997 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.86 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 206 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 us1000hpvg Id of event.
Event Code 1000hpvg An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us1000hpvg, A comma-separated list of event ids that are associated to an event.

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