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Light World Earthquakes Magnitude 4-4.9

Light earthquake, 4.2 mag was detected near Hihifo in Tonga


Earthquake location -15.2998S, -174.1139WA light earthquake magnitude 4.2 (ml/mb) has occurred on Thursday, 80 kilometers (50 miles) from Hihifo in Tonga. The 4.2-magnitude earthquake has occurred at 03:05:10 / 3:05 am (local time epicenter). The epicenter of the earthquake was roughly 35 km (22 miles) below the earth’s surface. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Exact location of earthquake, -174.1139° West, -15.2998° South, depth 35 km. Event ids that are associated to the earthquake: us7000ca82. Id of event: us7000ca82. Exact time and date of event in UTC/GMT: 29/10/20 / 2020-10-29 03:05:10 / October 29, 2020 @ 3:05 am.

Nearest city/cities or towns, with min 5000 pop, to epicentrum/hypocenter was Hihifo. Country/countries that might be effected, Tonga (c. 123 000 pop). The epicenter was 80 km (50 miles) from Hihifo (c. 800 pop).

There are an estimated 13,000 light quakes in the world each year. Earthquakes 4.0 to 5.0 are often felt, but only causes minor damage. In the past 24 hours, there have been four, in the last 10 days seven, in the past 30 days eleven and in the last 365 days seventy-seven earthquakes of magnitude 3.0 or greater that was reported nearby.

How would you describe the shaking?

What was your situation during the earthquake? Leave a comment or report about damage, shaking and activity at your home, city and country. Read more about the earthquake, Location, Distances, Seismometer information, Date-Time, Parameters and details about this quake, reported near: 80 km NNW of Hihifo, Tonga. This information comes from the USGS Earthquake Notification Service.

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More information

Parameter Value Description
Magnitude 4.2 mb The magnitude for the event.
Longitude -174.1139° West Decimal degrees longitude. Negative values for western longitudes.
Latitude -15.2998° South Decimal degrees latitude. Negative values for southern latitudes.
Depth 35 km Depth of the event in kilometers.
Place 80 km NNW 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 2020-10-29 03:05:10 Time when the event occurred. UTC/GMT
Updated 2020-11-23 05:43:48 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 271 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 2.646 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 1 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 162 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 us7000ca82 Id of event.
Event Code 7000ca82 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us7000ca82, A comma-separated list of event ids that are associated to an event.

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