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

Earthquake location -15.1S, -172.8WA 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.

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More information

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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