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Light earthquake: M4.3 quake has struck near Hihifo in Tonga

Posted by admin on October 13, 2017 0 Comments

Earthquake location -16.6221S, -174.5835WA light earthquake magnitude 4.3 (ml/mb) has occurred on Wednesday, 116 km SW of Hihifo, Tonga (72 miles). The 4.3-magnitude earthquake was detected at 19:09:28 / 7:09 pm (local time epicenter). Exact time and date of earthquake 21/09/17 / 2017-09-21 07:09:28 / September 21, 2017 @ 7:09 am UTC/GMT. The epicenter was at a depth of 235.11 km (146 miles). Exact location of earthquake, longitude -174.5835 West, latitude -16.6221 South, depth = 235.11 km. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Unique identifier: us2000awpe. Ids that are associated to the event: us2000awpe.

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 one, in the last 10 days three, in the past 30 days three and in the last 365 days fourty-four earthquakes of magnitude 3.0 or greater that has struck near.

Did you feel the quake?

How did you react? Was there any damage to buildings? Leave a comment or report about shaking, activity 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: 116 km SW of Hihifo, Tonga.

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More information

Parameter Value Description
Magnitude 4.3 mb The magnitude for the event.
Longitude -174.5835° West Decimal degrees longitude. Negative values for western longitudes.
Latitude -16.6221° South Decimal degrees latitude. Negative values for southern latitudes.
Depth 235.11 km Depth of the event in kilometers.
Place 116km SW of Hihifo, Tonga Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2017-09-21 07:09:28 Time when the event occurred. UTC/GMT
Updated 2017-10-13 12:05:52 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 284 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 3.822 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.62 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 84 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 us2000awpe Id of event.
Event Code 2000awpe An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us2000awpe, A comma-separated list of event ids that are associated to an event.

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