Light earthquake, 4 mag strikes near Neiafu in Tonga

A light earthquake magnitude 4 (ml/mb) strikes 187 km NW of Neiafu, Tonga (116 miles) on Sunday. The temblor was picked up at 17:19:47 / 5:19 pm (local time epicenter). Exact location of event, depth 243.12 km, -175.0789° West, -17.3139° South. Event id: us60006t7i. Ids that are associated to the earthquake: us60006t7i. The earthquake occurred at a depth of 243.12 km (151 miles). Date and time of earthquake in UTC/GMT: 09/12/19 / 2019-12-09 05:19:47 / December 9, 2019 @ 5:19 am. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist).

Every year there are an estimated 13,000 light earthquakes in the world. In the past 24 hours, there have been three, in the last 10 days three, in the past 30 days three and in the last 365 days thirty-seven 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.

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What was your situation during the earthquake? Leave a comment or report about damage, shaking and activity 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: 187 km NW of Neiafu, Tonga.

Neiafu Tonga

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Parameter	Value	Description
Magnitude	4 mb	The magnitude for the event.
Longitude	-175.0789° West	Decimal degrees longitude. Negative values for western longitudes.
Latitude	-17.3139° South	Decimal degrees latitude. Negative values for southern latitudes.
Depth	243.12 km	Depth of the event in kilometers.
Place	187km NW 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	2019-12-09 05:19:47	Time when the event occurred. UTC/GMT
Updated	2020-01-03 12:33:58	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	246	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	4.645	Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square	0.39 sec	The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap	107	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	us60006t7i	Id of event.
Event Code	60006t7i	An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS	,us60006t7i,	A comma-separated list of event ids that are associated to an event.

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Light earthquake, 4 mag strikes near Neiafu in Tonga

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