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Light World Earthquakes Magnitude 4-4.9

Light earthquake: M4.5 quake has struck near Hihifo in Tonga


Earthquake location -15.9029S, -174.4514WA light earthquake magnitude 4.5 (ml/mb) strikes 70 kilometers (43 miles) from Hihifo in Tonga on Thursday. All ids that are associated to the event: us6000demu. Unique identifier: us6000demu. Exact time and date of event in UTC/GMT: 28/01/21 / 2021-01-28 01:24:30 / January 28, 2021 @ 1:24 am. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Exact location of event, longitude -174.4514 West, latitude -15.9029 South, depth = 10 km. The 4.5-magnitude earthquake has occurred at 01:24:30 / 1:24 am (local time epicenter). The earthquake occurred at a depth of 10 km (6 miles).

Closest city/cities or villages, with min 5000 pop, to hypocenter/epicentrum was Hihifo. Close country/countries, Tonga (c. 123 000 pop) (That might be effected). Epicenter of the event was 70 km (44 miles) from Hihifo (c. 800 pop).

Earthquakes 4.0 to 5.0 are often felt, but only causes minor damage. In the past 24 hours, there have been two, in the last 10 days three, in the past 30 days seven and in the last 365 days fifty-five earthquakes of magnitude 3.0 or greater that have been detected in the same area. There are an estimated 13,000 light quakes in the world each year.

Did you feel it?

How did you respond? Did any furniture slide, topple over, or become displaced? Leave a comment or report about activity, shaking and damage at your home, city 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: 70 km W of Hihifo, Tonga.

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More information

Parameter Value Description
Magnitude 4.5 mb The magnitude for the event.
Longitude -174.4514° West Decimal degrees longitude. Negative values for western longitudes.
Latitude -15.9029° South Decimal degrees latitude. Negative values for southern latitudes.
Depth 10 km Depth of the event in kilometers.
Place 70 km W 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 2021-01-28 01:24:30 Time when the event occurred. UTC/GMT
Updated 2021-02-08 01:50:46 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 3.253 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.85 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 124 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 us6000demu Id of event.
Event Code 6000demu An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us6000demu, A comma-separated list of event ids that are associated to an event.

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