Strong earthquake 6.9 mag, 138 km NE of Hihifo, Tonga

A earthquake with magnitude 6.9 (ml/mb) was reported 138 km NE of Hihifo, Tonga (86 miles) on Friday. A tsunami warning has been issued near Hihifo in Tonga (Does not indicate if a tsunami actually did or will exist). The epicenter was at a depth of 80 km (50 miles). The temblor was picked up at 21:00:22 / 9:00 pm (local time epicenter). Exact location of earthquake, -172.8° West, -15.1° South, depth 80 km. Unique identifier: at00oyvycj. Ids that are associated to the event: pt17308000, at00oyvycj. Global time and date of event 04/11/17 / 2017-11-04 09:00:22 / November 4, 2017 @ 9:00 am UTC/GMT.

Earthquakes 6.0 to 6.9 may cause a lot of damage in very populated areas. In the past 24 hours, there have been one, in the last 10 days five, in the past 30 days six and in the last 365 days fourty-three earthquakes of magnitude 3.0 or greater that have been detected in the same area. Each year there are an estimated 135 earthquakes in the world.

Did you feel the quake?

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. This information comes from the USGS Earthquake Notification Service. Read more about the earthquake, Seismometer information, Date-Time, Location, Distances, Parameters and details about this quake, recorded: 138 km NE of Hihifo, Tonga.

Hihifo Tonga

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Parameter	Value	Description
Magnitude	6.9 mb	The magnitude for the event.
Longitude	-172.8° West	Decimal degrees longitude. Negative values for western longitudes.
Latitude	-15.1° South	Decimal degrees latitude. Negative values for southern latitudes.
Depth	80 km	Depth of the event in kilometers.
Place	138km NE 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	2017-11-04 09:00:22	Time when the event occurred. UTC/GMT
Updated	2017-11-04 09:12:08	Time when the event was most recently updated. UTC/GMT
Timezone offset	-720	Timezone offset from UTC in minutes at the event epicenter.
Felt	2	The total number of felt reports
CDI	3.8	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	1	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	733	A number describing how significant the event is. Larger numbers indicate a more significant event.
Network	at	The ID of a data contributor. Identifies the network considered to be the preferred source of information for this event.
Sources	,pt,at,	A comma-separated list of network contributors.
Number of Stations Used	54	The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance	0	Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square	1.08 sec	The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap	100.799991936	The largest azimuthal gap between azimuthally adjacent stations (in degrees).
Magnitude Type	Mi	The method or algorithm used to calculate the preferred magnitude for the event.
Event Type	earthquake	Type of seismic event.
Event ID	at00oyvycj	Id of event.
Event Code	00oyvycj	An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS	,pt17308000,at00oyvycj,	A comma-separated list of event ids that are associated to an event.

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Strong earthquake 6.9 mag, 138 km NE of Hihifo, Tonga

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