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Light World Earthquakes Magnitude 4-4.9

Light earthquake, 4 mag has occurred near Houma in Tonga


Earthquake location -23.0766S, -177.204WA light earthquake magnitude 4 (ml/mb) strikes 288 km SW of Houma, Tonga (179 miles) on Saturday. The 4-magnitude earthquake has occurred at 03:16:08 / 3:16 am (local time epicenter). Exact time and date of earthquake 20/04/24 / 2024-04-20 03:16:08 / April 20, 2024 @ 3:16 am UTC/GMT. Event ids that are associated to the earthquake: us6000mu0g. Id of event: us6000mu0g. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Exact location, longitude -177.204° West, latitude -23.0766° South, depth = 176.594 km. The earthquake was roughly at a depth of 176.594 km (110 miles).

Each year there are an estimated 13,000 light earthquakes in the world. 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 two 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.

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. This information comes from the USGS Earthquake Notification Service. Read more about the earthquake, Seismometer information, Date-Time, Location, Distances, Parameters and details about this quake, recorded: 288 km SW of Houma, Tonga.

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More information

Parameter Value Description
Magnitude 4 mb The magnitude for the event.
Longitude -177.204° West Decimal degrees longitude. Negative values for western longitudes.
Latitude -23.0766° South Decimal degrees latitude. Negative values for southern latitudes.
Depth 176.594 km Depth of the event in kilometers.
Place 288 km SW of Houma, Tonga Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2024-04-20 03:16:08 Time when the event occurred. UTC/GMT
Updated 2024-04-26 22:43:15 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 246 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 14 The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance 2.653 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.96 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 119 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 us6000mu0g Id of event.
Event Code 6000mu0g An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us6000mu0g, A comma-separated list of event ids that are associated to an event.

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