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Strong earthquake, 6.6 mag strikes near Vaini in Tonga

Earthquake location -22S, -177WA earthquake magnitude 6.6 (ml/mb) has struck on Friday, 206 km WSW of Vaini, Tonga (128 miles). The temblor was reported at 17:38:50 / 5:38 pm (local time epicenter). Global date and time of event UTC/GMT: 28/05/16 / 2016-05-28 05:38:50 / May 28, 2016 @ 5:38 am. The earthquake occurred at a depth of 420 km (261 miles) below the earth’s surface. A tsunami warning has been issued near Vaini in Tonga (Does not indicate if a tsunami actually did or will exist). Unique identifier: at00o7vh0q. Ids that are associated to the event: pt16149050, at00o7vh0q. Exact location of earthquake, longitude -177 West, latitude -22 South, depth = 420 km.

Earthquakes 6.0 to 6.9 may cause a lot of damage in very populated areas. There are an estimated 135 quakes in the world each year. In the past 24 hours, there have been two, in the last 10 days two, in the past 30 days two and in the last 365 days sixteen earthquakes of magnitude 3.0 or greater that have been detected in the same area.

Did you feel the quake?

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: 206 km WSW of Vaini, Tonga.

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More information

Parameter Value Description
Magnitude 6.6 mb The magnitude for the event.
Longitude -177° West Decimal degrees longitude. Negative values for western longitudes.
Latitude -22° South Decimal degrees latitude. Negative values for southern latitudes.
Depth 420 km Depth of the event in kilometers.
Place 206km WSW of Vaini, Tonga Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2016-05-28 05:38:50 Time when the event occurred. UTC/GMT
Updated 2016-05-28 05:49:36 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 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 670 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 32 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 1.1 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 86.4 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 at00o7vh0q Id of event.
Event Code 00o7vh0q An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,pt16149050,at00o7vh0q, A comma-separated list of event ids that are associated to an event.

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