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Light World Earthquakes Magnitude 4-4.9

Light earthquake, 4.1 mag was detected near Hihifo in Tonga

Earthquake location -16.2309S, -172.218WA light earthquake magnitude 4.1 (ml/mb) strikes 171 km E of Hihifo, Tonga (106 miles) on Tuesday. Global time and date of event 22/12/20 / 2020-12-22 17:23:39 / December 22, 2020 @ 5:23 pm UTC/GMT. Id of earthquake: us6000d5hv. Event ids that are associated: us6000d5hv. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). The epicenter of the earthquake was roughly 498.91 km (310 miles) below the earth’s surface. Exact location of earthquake, longitude -172.218 West, latitude -16.2309 South, depth = 498.91 km. The temblor was detected at 17:23:39 / 5:23 pm (local time epicenter).

In the past 24 hours, there have been one, in the last 10 days three, in the past 30 days five and in the last 365 days thirty-three earthquakes of magnitude 3.0 or greater that was reported nearby. 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.

How would you describe the shaking?

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, Distances, Seismometer information, Date-Time, Parameters, Location and details about this quake, that has struck: 171 km E of Hihifo, Tonga. This data comes from the USGS Earthquake Notification Service.

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More information

Parameter Value Description
Magnitude 4.1 mb The magnitude for the event.
Longitude -172.218° West Decimal degrees longitude. Negative values for western longitudes.
Latitude -16.2309° South Decimal degrees latitude. Negative values for southern latitudes.
Depth 498.91 km Depth of the event in kilometers.
Place 171 km E 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 2020-12-22 17:23:39 Time when the event occurred. UTC/GMT
Updated 2021-01-16 21:49:13 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 259 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 9.429 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 156 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 us6000d5hv Id of event.
Event Code 6000d5hv An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us6000d5hv, A comma-separated list of event ids that are associated to an event.

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