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Light World Earthquakes Magnitude 4-4.9

Light earthquake, 4.5 mag was detected near Vaini in Tonga



Earthquake location -22.0867S, -175.6367WA light earthquake magnitude 4.5 (ml/mb) has struck on Friday, 108 km SSW of Vaini, Tonga (67 miles). Exact location of earthquake, longitude -175.6367 West, latitude -22.0867 South, depth = 10 km. The earthquake was roughly at a depth of 10 km (6 miles). Id of earthquake: us10008tcz. Event ids that are associated: us10008tcz. The temblor was picked up at 08:45:29 / 8:45 am (local time epicenter). Date and time of earthquake in UTC/GMT: 12/05/17 / 2017-05-12 20:45:29 / May 12, 2017 @ 8:45 pm. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist).

In the past 24 hours, there have been three, in the last 10 days three, in the past 30 days three and in the last 365 days twenty-two earthquakes of magnitude 3.0 or greater that has struck near. Earthquakes 4.0 to 5.0 are often felt, but only causes minor damage. Each year there are an estimated 13,000 light earthquakes in the world.

Questions or comments?

Did objects rattle, topple over, or fall off shelves? Leave a comment or report about activity, shaking and damage at your home, country and city. Read more about the earthquake, Location, Distances, Seismometer information, Date-Time, Parameters and details about this quake, reported near: 108 km SSW of Vaini, Tonga. This information comes from the USGS Earthquake Notification Service.

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More information

Parameter Value Description
Magnitude 4.5 mb The magnitude for the event.
Longitude -175.6367° West Decimal degrees longitude. Negative values for western longitudes.
Latitude -22.0867° South Decimal degrees latitude. Negative values for southern latitudes.
Depth 10 km Depth of the event in kilometers.
Place 108km SSW 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 2017-05-12 20:45:29 Time when the event occurred. UTC/GMT
Updated 2017-06-07 19:13:24 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 6.129 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.77 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 118 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 us10008tcz Id of event.
Event Code 10008tcz An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us10008tcz, A comma-separated list of event ids that are associated to an event.

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