Light earthquake: M4.2 quake has struck near Kiomboi in Tanzania

A light earthquake with magnitude 4.2 (ml/mb) was detected on Sunday, 44 kilometers (27 miles) from Kiomboi in Tanzania. Exact location of earthquake, longitude 34.2271 East, latitude -3.8883 South, depth = 10 km. The temblor was picked up at 19:52:21 / 7:52 pm (local time epicenter). The earthquake occurred at a depth of 10 km (6 miles). Unique identifier: us6000qjdw. Ids that are associated to the event: us6000qjdw. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Global date and time of event UTC/GMT: 25/05/25 / 2025-05-25 19:52:21 / May 25, 2025 @ 7:52 pm.

Closest city/cities/towns to epicentrum/hypocenter was Shinyanga, Nyalikungu, Kisesa (min 5000 pop). The epicenter was 93 km (58 miles) from Shinyanga (c. 107 400 pop), 58 km (36 miles) from Igunga (c. 35 600 pop), 66 km (41 miles) from Somanda (c. 33 900 pop), 90 km (56 miles) from Kisesa (c. 29 800 pop), 53 km (33 miles) from Shelui (c. 24 800 pop), 93 km (58 miles) from Nyalikungu (c. 24 600 pop). Close country/countries that might be effected, Tanzania (c. 41 893 000 pop).

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

Questions or comments?

Did objects rattle, topple over, or fall off shelves? Leave a comment or report about activity, shaking and damage at your home, country and city. 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: 44 km NNW of Kiomboi, Tanzania.

More information

Parameter	Value	Description
Magnitude	4.2 mb	The magnitude for the event.
Longitude	34.2271° East	Decimal degrees longitude. Negative values for western longitudes.
Latitude	-3.8883° South	Decimal degrees latitude. Negative values for southern latitudes.
Depth	10 km	Depth of the event in kilometers.
Place	44 km NNW of Kiomboi, Tanzania	Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time	2025-05-25 19:52:21	Time when the event occurred. UTC/GMT
Updated	2025-06-12 15:08:27	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	21	The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance	4.081	Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square	0.65 sec	The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap	107	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	us6000qjdw	Id of event.
Event Code	6000qjdw	An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS	,us6000qjdw,	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 Kiomboi in Tanzania

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