Light earthquake: M4.5 quake has struck near Neiafu in Tonga

A light earthquake magnitude 4.5 (ml/mb) has occurred on Saturday, 139 km NNW of Neiafu, Tonga (86 miles). The epicenter was at a depth of 80.32 km (50 miles). All ids that are associated to the event: us20009yyd. Unique identifier: us20009yyd. Exact location of earthquake, longitude -174.3637 West, latitude -17.4423 South, depth = 80.32 km. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Global date and time of event UTC/GMT: 16/07/17 / 2017-07-16 06:46:52 / July 16, 2017 @ 6:46 am. The temblor was detected at 18:46:52 / 6:46 pm (local time epicenter).

There are an estimated 13,000 light quakes 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 three, in the last 10 days three, in the past 30 days five and in the last 365 days fourty-four earthquakes of magnitude 3.0 or greater that was reported nearby.

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Were you asleep? Was it difficult to stand and/or walk? Leave a comment or report about shaking, activity and damage at your city, home and country. Read more about the earthquake, Location, Distances, Seismometer information, Date-Time, Parameters and details about this quake, reported near: 139 km NNW of Neiafu, Tonga. This information comes from the USGS Earthquake Notification Service.

Neiafu Tonga

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Parameter	Value	Description
Magnitude	4.5 mb	The magnitude for the event.
Longitude	-174.3637° West	Decimal degrees longitude. Negative values for western longitudes.
Latitude	-17.4423° South	Decimal degrees latitude. Negative values for southern latitudes.
Depth	80.32 km	Depth of the event in kilometers.
Place	139km NNW 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	2017-07-16 06:46:52	Time when the event occurred. UTC/GMT
Updated	2017-08-13 11:05:06	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	312	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	4.306	Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square	0.51 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	us20009yyd	Id of event.
Event Code	20009yyd	An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS	,us20009yyd,	A comma-separated list of event ids that are associated to an event.

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Light earthquake: M4.5 quake has struck near Neiafu in Tonga

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