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Light World Earthquakes Magnitude 4-4.9

Light earthquake, 4.2 mag was detected near Hihifo in Tonga


Earthquake location -16.7678S, -171.8637WA light earthquake magnitude 4.2 (ml/mb) has occurred on Thursday, 220 km ESE of Hihifo, Tonga (137 miles). The earthquake was roughly at a depth of 35.83 km (22 miles). Exact location of event, longitude -171.8637 West, latitude -16.7678 South, depth = 35.83 km. The temblor was detected at 12:29:28 / 12:29 pm (local time epicenter). A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Id of earthquake: us20007dur. Event ids that are associated: us20007dur. Global time and date of event 06/10/16 / 2016-10-06 23:29:28 / October 6, 2016 @ 11:29 pm UTC/GMT.

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

Questions or comments?

What was your situation during the earthquake? Leave a comment or report about damage, shaking and activity at your home, city and country. Read more about the earthquake, Distances, Seismometer information, Date-Time, Parameters, Location and details about this quake, that has struck: 220 km ESE of Hihifo, Tonga. This data comes from the USGS Earthquake Notification Service.

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More information

Parameter Value Description
Magnitude 4.2 mb The magnitude for the event.
Longitude -171.8637° West Decimal degrees longitude. Negative values for western longitudes.
Latitude -16.7678° South Decimal degrees latitude. Negative values for southern latitudes.
Depth 35.83 km Depth of the event in kilometers.
Place 220km ESE 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 2016-10-06 23:29:28 Time when the event occurred. UTC/GMT
Updated 2016-10-28 03:44:51 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 271 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 2.944 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.86 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 210 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 us20007dur Id of event.
Event Code 20007dur An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us20007dur, A comma-separated list of event ids that are associated to an event.

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