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Light World Earthquakes Magnitude 4-4.9

Light earthquake, 4.8 mag strikes near Stilfontein in South Africa


Earthquake location -26.9177S, 26.8206WA light earthquake magnitude 4.8 (ml/mb) has occurred on Thursday, 9 kilometers (6 miles) from Stilfontein in South Africa. The temblor was reported at 08:57:29 / 8:57 am (local time epicenter). Date and time of earthquake in UTC/GMT: 17/04/25 / 2025-04-17 08:57:29 / April 17, 2025 @ 8:57 am. Exact location, longitude 26.8206° East, latitude -26.9177° South, depth = 10 km. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). The earthquake occurred at a depth of 10 km (6 miles). All ids that are associated to the event: us6000q6px. Unique identifier: us6000q6px.

Closest city/cities/towns to epicentrum/hypocenter was Sasolburg, Allanridge, Kroonstad (min 5000 pop). Epicenter of the event was 84 km (52 miles) from Carletonville (c. 182 300 pop), 17 km (11 miles) from Klerksdorp (c. 178 900 pop), 16 km (10 miles) from Orkney (c. 145 800 pop), 36 km (22 miles) from Potchefstroom (c. 123 700 pop), 91 km (57 miles) from Kroonstad (c. 104 000 pop), 10 km (6 miles) from Stilfontein (c. 93 100 pop), 100 km (62 miles) from Sasolburg (c. 77 000 pop). Close country/countries that might be effected, South Africa (c. 49 000 000 pop).

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

Did you feel the quake?

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. Read more about the earthquake, Distances, Seismometer information, Date-Time, Parameters, Location and details about this quake, that has struck: 9 km SSE of Stilfontein, South Africa. This data comes from the USGS Earthquake Notification Service.

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More information

Parameter Value Description
Magnitude 4.8 mb The magnitude for the event.
Longitude 26.8206° East Decimal degrees longitude. Negative values for western longitudes.
Latitude -26.9177° South Decimal degrees latitude. Negative values for southern latitudes.
Depth 10 km Depth of the event in kilometers.
Place 9 km SSE of Stilfontein, South Africa Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2025-04-17 08:57:29 Time when the event occurred. UTC/GMT
Updated 2025-05-08 06:02:52 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 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 54 The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance 2.186 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.57 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 54 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 us6000q6px Id of event.
Event Code 6000q6px An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us6000q6px, A comma-separated list of event ids that are associated to an event.

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