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Light World Earthquakes Magnitude 4-4.9

Light earthquake, 4.7 mag strikes near Neiafu in Tonga

Earthquake location -17.9586S, -174.4339WA light earthquake with magnitude 4.7 (ml/mb) was reported 90 kilometers (56 miles) from Neiafu in Tonga on Friday. Exact location, longitude -174.4339° West, latitude -17.9586° South, depth = 76.6 km. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Unique identifier: us70007q5p. Ids that are associated to the event: us70007q5p. Exact time and date of earthquake 08/02/20 / 2020-02-08 09:41:32 / February 8, 2020 @ 9:41 am UTC/GMT. The temblor was detected at 21:41:32 / 9:41 pm (local time epicenter). The epicenter was at a depth of 76.6 km (48 miles).

Event epicenter was 90 km (56 miles) from Neiafu (c. 4 300 pop). Nearest cities/city/towns to hypocenter/epicentrum was Neiafu (min 5000 pop). Nearby country/countries, Tonga (c. 123 000 pop) (That might be effected).

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

Questions or comments?

Did objects rattle, topple over, or fall off shelves? Leave a comment or report about activity, shaking and damage at your home, country and city. 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: 90 km NNW of Neiafu, Tonga.

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More information

Parameter Value Description
Magnitude 4.7 mb The magnitude for the event.
Longitude -174.4339° West Decimal degrees longitude. Negative values for western longitudes.
Latitude -17.9586° South Decimal degrees latitude. Negative values for southern latitudes.
Depth 76.6 km Depth of the event in kilometers.
Place 90km NNW of Neiafu, Tonga Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2020-02-08 09:41:32 Time when the event occurred. UTC/GMT
Updated 2020-03-07 08:09:10 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 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 4.418 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.44 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 129 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 us70007q5p Id of event.
Event Code 70007q5p An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us70007q5p, A comma-separated list of event ids that are associated to an event.

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