Light earthquake: M4.8 quake has struck near Ambunti in Papua New Guinea

A light earthquake with magnitude 4.8 (ml/mb) was detected on Wednesday, 36 kilometers (22 miles) from Ambunti in Papua New Guinea. Global date and time of event UTC/GMT: 03/09/25 / 2025-09-03 18:39:32 / September 3, 2025 @ 6:39 pm. The epicenter was at a depth of 68.269 km (42 miles). The temblor was reported at 18:39:32 / 6:39 pm (local time epicenter). A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Event ids that are associated to the earthquake: us7000qtkm. Id of event: us7000qtkm. Exact location of event, longitude 143.0991 East, latitude -4.0386 South, depth = 68.269 km.

Close country/countries that might be effected, Papua New Guinea (c. 6 065 000 pop). Nearest cities/city/towns to hypocenter/epicentrum was Wewak (min 5000 pop). Epicenter of the event was 80 km (49 miles) from Wewak (c. 18 200 pop).

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

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Were you asleep? Was it difficult to stand and/or walk? Leave a comment or report about shaking, activity and damage at your city, home and country. This data comes from the USGS Earthquake Notification Service. Read more about the earthquake, Seismometer information, Distances, Parameters, Date-Time, Location and details about this quake, that has occurred near: 36 km ENE of Ambunti, Papua New Guinea.

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Parameter	Value	Description
Magnitude	4.8 mb	The magnitude for the event.
Longitude	143.0991° East	Decimal degrees longitude. Negative values for western longitudes.
Latitude	-4.0386° South	Decimal degrees latitude. Negative values for southern latitudes.
Depth	68.269 km	Depth of the event in kilometers.
Place	36 km ENE of Ambunti, Papua New Guinea	Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time	2025-09-03 18:39:32	Time when the event occurred. UTC/GMT
Updated	2025-09-03 19:15:32	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	354	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	60	The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance	2.831	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	77	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	us7000qtkm	Id of event.
Event Code	7000qtkm	An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS	,us7000qtkm,	A comma-separated list of event ids that are associated to an event.

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Light earthquake: M4.8 quake has struck near Ambunti in Papua New Guinea

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