Light earthquake, 4.5 mag was detected near Hihifo in Tonga

A light earthquake magnitude 4.5 (ml/mb) has occurred on Sunday, 182 km SE of Hihifo, Tonga (113 miles). The epicenter was at a depth of 10 km (6 miles). All ids that are associated to the event: us6000rm51. Unique identifier: us6000rm51. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). The temblor was picked up at 00:00:20 / 12:00 am (local time epicenter). Exact location of event, longitude -172.731 West, latitude -17.2422 South, depth = 10 km. Exact time and date of event in UTC/GMT: 19/10/25 / 2025-10-19 00:00:20 / October 19, 2025 @ 12:00 am.

In the past 24 hours, there have been three, in the last 10 days three, in the past 30 days five and in the last 365 days thirty-four 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. Each year there are an estimated 13,000 light quakes in the world.

Did you feel anything?

What was your situation during the earthquake? Leave a comment or report about damage, shaking and activity 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: 182 km SE of Hihifo, Tonga.

Hihifo Tonga

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Parameter	Value	Description
Magnitude	4.5 mb	The magnitude for the event.
Longitude	-172.731° West	Decimal degrees longitude. Negative values for western longitudes.
Latitude	-17.2422° South	Decimal degrees latitude. Negative values for southern latitudes.
Depth	10 km	Depth of the event in kilometers.
Place	182 km 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	2025-10-19 00:00:20	Time when the event occurred. UTC/GMT
Updated	2025-11-09 02:55:52	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	21	The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance	3.438	Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square	0.94 sec	The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap	130	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	us6000rm51	Id of event.
Event Code	6000rm51	An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS	,us6000rm51,	A comma-separated list of event ids that are associated to an event.

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Light earthquake, 4.5 mag was detected near Hihifo in Tonga

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