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Light earthquake: M4.2 quake has struck near Neiafu in Tonga

Posted by admin on October 31, 2025 0 Comments

Earthquake location -17.6304S, -175.0535WA light earthquake magnitude 4.2 (ml/mb) strikes 159 km NW of Neiafu, Tonga (99 miles) on Friday. Exact time and date of earthquake 31/10/25 / 2025-10-31 03:31:57 / October 31, 2025 @ 3:31 am UTC/GMT. Exact location of event, longitude -175.0535 West, latitude -17.6304 South, depth = 234.848 km. Unique identifier: us6000rkia. Ids that are associated to the event: us6000rkia. The epicenter of the earthquake was roughly 234.848 km (146 miles) below the earth’s surface. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). The 4.2-magnitude earthquake was detected at 03:31:57 / 3:31 am (local time epicenter).

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 one, in the last 10 days one, in the past 30 days two and in the last 365 days twenty-seven earthquakes of magnitude 3.0 or greater that have been detected in the same area.

Did you feel it?

What was your situation during the earthquake? Leave a comment or report about damage, shaking and activity at your home, city and country. The information in this article comes from the USGS Earthquake Notification Service. Read more about the earthquake, Seismometer information, Distances, Parameters, Date-Time, Location and details about this quake, detected near: 159 km NW of Neiafu, Tonga.

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More information

Parameter Value Description
Magnitude 4.2 mb The magnitude for the event.
Longitude -175.0535° West Decimal degrees longitude. Negative values for western longitudes.
Latitude -17.6304° South Decimal degrees latitude. Negative values for southern latitudes.
Depth 234.848 km Depth of the event in kilometers.
Place 159 km NW of Neiafu, Tonga Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2025-10-31 03:31:57 Time when the event occurred. UTC/GMT
Updated 2025-10-31 03:49:00 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 17 The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance 4.859 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.3 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 132 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 us6000rkia Id of event.
Event Code 6000rkia An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us6000rkia, A comma-separated list of event ids that are associated to an event.

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