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

A light earthquake magnitude 4.2 (ml/mb) has occurred on Saturday, 274 km WNW of Houma, Tonga (170 miles). Exact location of earthquake, -177.6892° West, -20.1246° South, depth 503.092 km. The epicenter was at a depth of 503.092 km (313 miles). A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). The temblor was reported at 04:45:28 / 4:45 am (local time epicenter). Global date and time of event UTC/GMT: 31/05/25 / 2025-05-31 04:45:28 / May 31, 2025 @ 4:45 am. Event ids that are associated to the earthquake: us6000qkmd. Id of event: us6000qkmd.

In the past 24 hours, there have been five, in the last 10 days nine, in the past 30 days twenty and in the last 365 days one hundred and thirty-six earthquakes of magnitude 3.0 or greater that has occurred nearby. Earthquakes 4.0 to 5.0 are often felt, but only causes minor damage. There are an estimated 13,000 light earthquakes in the world each year.

Questions or comments?

How did you react? Was there any damage to buildings? Leave a comment or report about shaking, activity and damage at your home, city and country. Read more about the earthquake, Distances, Seismometer information, Date-Time, Parameters, Location and details about this quake, that has struck: 274 km WNW of Houma, Tonga. This data comes from the USGS Earthquake Notification Service.

Houma Tonga

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Parameter	Value	Description
Magnitude	4.2 mb	The magnitude for the event.
Longitude	-177.6892° West	Decimal degrees longitude. Negative values for western longitudes.
Latitude	-20.1246° South	Decimal degrees latitude. Negative values for southern latitudes.
Depth	503.092 km	Depth of the event in kilometers.
Place	274 km WNW of Houma, Tonga	Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time	2025-05-31 04:45:28	Time when the event occurred. UTC/GMT
Updated	2025-06-18 01:27:33	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	15	The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance	4.674	Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square	0.37 sec	The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap	96	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	us6000qkmd	Id of event.
Event Code	6000qkmd	An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS	,us6000qkmd,	A comma-separated list of event ids that are associated to an event.

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

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