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Light World Earthquakes Magnitude 4-4.9

Light earthquake 4.5 mag, 76 km SSE of Neiafu, Tonga


Earthquake location -19.3189S, -173.794WA light earthquake with magnitude 4.5 (ml/mb) was reported 76 kilometers (47 miles) from Neiafu in Tonga on Wednesday. The temblor was picked up at 16:14:14 / 4:14 pm (local time epicenter). Exact location of earthquake, longitude -173.794 West, latitude -19.3189 South, depth = 35 km. Exact time and date of event in UTC/GMT: 02/12/20 / 2020-12-02 16:14:14 / December 2, 2020 @ 4:14 pm. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Event ids that are associated to the earthquake: us7000cn2u. Id of event: us7000cn2u. The earthquake occurred at a depth of 35 km (22 miles) below the earth’s surface.

Close country/countries that might be effected, Tonga (c. 123 000 pop). Epicenter of the earthquake was 77 km (48 miles) from Neiafu (c. 4 300 pop), 81 km (50 miles) from Pangai (c. 1 700 pop). Closest city/cities or villages, with min 5000 pop, to hypocenter/epicentrum was Pangai, Neiafu.

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 fifty-five earthquakes of magnitude 3.0 or greater that have been detected in the same area. Each year there are an estimated 13,000 light earthquakes in the world. 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: 76 km SSE of Neiafu, Tonga.

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More information

Parameter Value Description
Magnitude 4.5 mb The magnitude for the event.
Longitude -173.794° West Decimal degrees longitude. Negative values for western longitudes.
Latitude -19.3189° South Decimal degrees latitude. Negative values for southern latitudes.
Depth 35 km Depth of the event in kilometers.
Place 76 km SSE 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 2020-12-02 16:14:14 Time when the event occurred. UTC/GMT
Updated 2020-12-08 03:06:52 Time when the event was most recently updated. UTC/GMT
Timezone offset 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 3.662 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 1.02 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 80 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 us7000cn2u Id of event.
Event Code 7000cn2u An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us7000cn2u, A comma-separated list of event ids that are associated to an event.

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