Light earthquake, 4.3 mag was detected near Neiafu in Tonga

A light earthquake magnitude 4.3 (ml/mb) has occurred on Tuesday, 289 km WNW of Neiafu, Tonga (180 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: 12/12/17 / 2017-12-12 19:35:16 / December 12, 2017 @ 7:35 pm. The earthquake was roughly at a depth of 10 km (6 miles). The 4.3-magnitude earthquake was detected at 07:35:16 / 7:35 am (local time epicenter). Exact location of event, depth 10 km, -176.5223° West, -17.665° South. All ids that are associated to the event: us1000bt5a. Unique identifier: us1000bt5a.

In the past 24 hours, there have been two, in the last 10 days two, in the past 30 days three and in the last 365 days fifteen earthquakes of magnitude 3.0 or greater that have been detected in the same area. 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.

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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: 289 km WNW of Neiafu, Tonga.

Neiafu Tonga

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Parameter	Value	Description
Magnitude	4.3 mb	The magnitude for the event.
Longitude	-176.5223° West	Decimal degrees longitude. Negative values for western longitudes.
Latitude	-17.665° South	Decimal degrees latitude. Negative values for southern latitudes.
Depth	10 km	Depth of the event in kilometers.
Place	289km WNW 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	2017-12-12 19:35:16	Time when the event occurred. UTC/GMT
Updated	2018-01-10 18:37:44	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	5.899	Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square	1.23 sec	The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap	144	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	us1000bt5a	Id of event.
Event Code	1000bt5a	An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS	,us1000bt5a,	A comma-separated list of event ids that are associated to an event.

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Light earthquake, 4.3 mag was detected near Neiafu in Tonga

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