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Light World Earthquakes Magnitude 4-4.9

Light earthquake, 4.5 mag strikes near Hihifo in Tonga


Earthquake location -16.275S, -173.4717WA light earthquake magnitude 4.5 (ml/mb) has occurred on Monday, 46 kilometers (29 miles) from Hihifo in Tonga. Exact location of earthquake, longitude -173.4717 West, latitude -16.275 South, depth = 37.49 km. Event id: us60005mvk. Ids that are associated to the earthquake: us60005mvk. The temblor was reported at 03:22:29 / 3:22 am (local time epicenter). Global date and time of event UTC/GMT: 16/09/19 / 2019-09-16 15:22:29 / September 16, 2019 @ 3:22 pm. The epicenter of the earthquake was roughly 37.49 km (23 miles) below the earth’s surface. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist).

Nearby country/countries that might be effected, Tonga (c. 123 000 pop). Nearest city/cities or towns, with min 5000 pop, to epicentrum/hypocenter was Hihifo. Epicenter of the event was 50 km (31 miles) from Hihifo (c. 800 pop).

In the past 24 hours, there have been four, in the last 10 days five, in the past 30 days six and in the last 365 days fifty-one 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.

Did you feel the quake?

Were you asleep? Was it difficult to stand and/or walk? Leave a comment or report about shaking, activity and damage at your city, home and country. 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: 46 km SE of Hihifo, Tonga.

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More information

Parameter Value Description
Magnitude 4.5 mb The magnitude for the event.
Longitude -173.4717° West Decimal degrees longitude. Negative values for western longitudes.
Latitude -16.275° South Decimal degrees latitude. Negative values for southern latitudes.
Depth 37.49 km Depth of the event in kilometers.
Place 46km SE 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 2019-09-16 15:22:29 Time when the event occurred. UTC/GMT
Updated 2019-09-24 19:03:45 Time when the event was most recently updated. UTC/GMT
Timezone offset -720 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 2.865 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.21 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 110 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 us60005mvk Id of event.
Event Code 60005mvk An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us60005mvk, A comma-separated list of event ids that are associated to an event.

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