Light earthquake, 4.9 mag was detected near Vaini in Tonga

A light earthquake magnitude 4.9 (ml/mb) has occurred on Monday, 149 km SW of Vaini, Tonga (93 miles). The temblor was reported at 19:56:21 / 7:56 pm (local time epicenter). The earthquake occurred at a depth of 130.67 km (81 miles). A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Exact time and date of event in UTC/GMT: 20/12/16 / 2016-12-20 07:56:21 / December 20, 2016 @ 7:56 am. Id of earthquake: us10007rey. Event ids that are associated: us10007rey. Exact location, longitude -176.0506° West, latitude -22.2919° South, depth = 130.67 km.

In the past 24 hours, there have been one, in the last 10 days two, in the past 30 days four and in the last 365 days nineteen earthquakes of magnitude 3.0 or greater that have been detected nearby. 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.

Did you feel the quake?

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. 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: 149 km SW of Vaini, Tonga.

Tonga Vaini

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Parameter	Value	Description
Magnitude	4.9 mb	The magnitude for the event.
Longitude	-176.0506° West	Decimal degrees longitude. Negative values for western longitudes.
Latitude	-22.2919° South	Decimal degrees latitude. Negative values for southern latitudes.
Depth	130.67 km	Depth of the event in kilometers.
Place	149km SW of Vaini, Tonga	Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time	2016-12-20 07:56:21	Time when the event occurred. UTC/GMT
Updated	2017-01-10 09:36:03	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	369	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	6.564	Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square	1.2 sec	The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap	136	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	us10007rey	Id of event.
Event Code	10007rey	An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS	,us10007rey,	A comma-separated list of event ids that are associated to an event.

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Light earthquake, 4.9 mag was detected near Vaini in Tonga

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