Light earthquake: M4.7 quake has struck near Hihifo in Tonga

A light earthquake magnitude 4.7 (ml/mb) has occurred on Tuesday, 171 km SE of Hihifo, Tonga (106 miles). Exact location of event, depth 10 km, -172.4534° West, -16.8662° South. Exact time and date of event in UTC/GMT: 09/05/17 / 2017-05-09 18:17:15 / May 9, 2017 @ 6:17 pm. Id of earthquake: us10008rye. Event ids that are associated: us10008rye. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). The epicenter was at a depth of 10 km (6 miles). The temblor was reported at 07:17:15 / 7:17 am (local time epicenter).

Earthquakes 4.0 to 5.0 are often felt, but only causes minor damage. 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 thirty-two earthquakes of magnitude 3.0 or greater that have been detected in the same area. Each year there are an estimated 13,000 light quakes in the world.

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How did you respond? Did any furniture slide, topple over, or become displaced? Leave a comment or report about activity, shaking and damage 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: 171 km SE of Hihifo, Tonga.

Hihifo Tonga

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Parameter	Value	Description
Magnitude	4.7 mb	The magnitude for the event.
Longitude	-172.4534° West	Decimal degrees longitude. Negative values for western longitudes.
Latitude	-16.8662° South	Decimal degrees latitude. Negative values for southern latitudes.
Depth	10 km	Depth of the event in kilometers.
Place	171km SE of Hihifo, Tonga	Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time	2017-05-09 18:17:15	Time when the event occurred. UTC/GMT
Updated	2017-06-02 19:06:04	Time when the event was most recently updated. UTC/GMT
Timezone offset	-660	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	340	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	3.011	Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square	0.96 sec	The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap	120	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	us10008rye	Id of event.
Event Code	10008rye	An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS	,us10008rye,	A comma-separated list of event ids that are associated to an event.

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Light earthquake: M4.7 quake has struck near Hihifo in Tonga

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