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Strong earthquake, 6.4 mag was detected near Nuku`alofa in Tonga

Posted by admin on December 23, 2018 0 Comments

Earthquake location -20.3749S, -175.0925WA earthquake magnitude 6.4 (ml/mb) has occurred on Sunday, 84 kilometers (52 miles) from Nuku`alofa in Tonga. The temblor was detected at 11:08:40 / 11:08 am (local time epicenter). The earthquake was roughly at a depth of 100.17 km (62 miles). A tsunami warning has been issued near Nuku`alofa in Tonga (Does not indicate if a tsunami actually did or will exist). Event ids that are associated to the earthquake: us2000iwvb, pt18357001, at00pk7pmi. Id of event: us2000iwvb. Exact location of event, depth 100.17 km, -175.0925° West, -20.3749° South. Exact time and date of event in UTC/GMT: 23/12/18 / 2018-12-23 23:08:40 / December 23, 2018 @ 11:08 pm.

Country/countries that might be effected, Tonga (c. 123 000 pop). Event epicenter was 86 km (53 miles) from Nuku‘alofa (c. 22 400 pop), 99 km (62 miles) from Pangai (c. 1 700 pop), 108 km (67 miles) from ‘Ohonua (c. 1 200 pop). Nearest cities/city/villages to epicentrum/hypocenter was ‘Ohonua, Pangai, Nuku‘alofa (min 5000 pop).

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 eighteen earthquakes of magnitude 3.0 or greater that have been detected nearby. Earthquakes 6.0 to 6.9 may cause a lot of damage in very populated areas. There are an estimated 135 earthquakes in the world each year.

Did you feel anything?

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. 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: 84 km N of Nuku`alofa, Tonga.

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More information

Parameter Value Description
Magnitude 6.4 mb The magnitude for the event.
Longitude -175.0925° West Decimal degrees longitude. Negative values for western longitudes.
Latitude -20.3749° South Decimal degrees latitude. Negative values for southern latitudes.
Depth 100.17 km Depth of the event in kilometers.
Place 84km N 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 2018-12-23 23:08:40 Time when the event occurred. UTC/GMT
Updated 2018-12-23 23:29:07 Time when the event was most recently updated. UTC/GMT
Timezone offset -720 Timezone offset from UTC in minutes at the event epicenter.
Felt 1 The total number of felt reports
CDI 2 The maximum reported intensity for the event.
MMI 4.89 The maximum estimated instrumental intensity for the event.
Alert Level green 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 1 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 630 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,pt,at, 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 5.034 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 1.47 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 20 The largest azimuthal gap between azimuthally adjacent stations (in degrees).
Magnitude Type mww The method or algorithm used to calculate the preferred magnitude for the event.
Event Type earthquake Type of seismic event.
Event ID us2000iwvb Id of event.
Event Code 2000iwvb An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us2000iwvb,pt18357001,at00pk7pmi, A comma-separated list of event ids that are associated to an event.

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