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Light World Earthquakes Magnitude 4-4.9

Light earthquake, 4.5 mag was detected near Neiafu in Tonga



Earthquake location -18.874S, -172.9858WA light earthquake magnitude 4.5 (ml/mb) has struck on Wednesday, 108 km ESE of Neiafu, Tonga (67 miles). Exact location of event, depth 10 km, -172.9858° West, -18.874° South. Event id: us20004wbt. Ids that are associated to the earthquake: us20004wbt. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Exact time and date of event in UTC/GMT: 27/01/16 / 2016-01-27 19:15:48 / January 27, 2016 @ 7:15 pm. The earthquake occurred at a depth of 10 km (6 miles) below the earth’s surface. The temblor was reported at 07:15:48 / 7:15 am (local time epicenter).

Each year there are an estimated 13,000 light quakes in the world. In the past 24 hours, there have been five, in the last 10 days six, in the past 30 days six and in the last 365 days nineteen 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.

Did you feel it?

What was your situation during the earthquake? Leave a comment or report about damage, shaking and activity 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: 108 km ESE of Neiafu, Tonga.

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More information

Parameter Value Description
Magnitude 4.5 mb The magnitude for the event.
Longitude -172.9858° West Decimal degrees longitude. Negative values for western longitudes.
Latitude -18.874° South Decimal degrees latitude. Negative values for southern latitudes.
Depth 10 km Depth of the event in kilometers.
Place 108km ESE of Neiafu, Tonga Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2016-01-27 19:15:48 Time when the event occurred. UTC/GMT
Updated 2016-02-25 19:01:57 Time when the event was most recently updated. UTC/GMT
Timezone offset -720 Timezone offset from UTC in minutes at the event epicenter.
Felt 0 The total number of felt reports
CDI 1 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 2.901 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.54 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 104 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 us20004wbt Id of event.
Event Code 20004wbt An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us20004wbt, A comma-separated list of event ids that are associated to an event.

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