Magnitude 5.7 Earthquake Struck South of Africa
The tremor occurred 1,673 kilometers south-southeast of Gqeberha at a depth of 10 kilometers.
Updated on Sept. 22, 2026 in Geology
Live Poll
Do you trust information about natural disasters shared on social media without verifying with official sources?
A 5.7 magnitude earthquake was recorded south of Africa on 20 September 2026. The seismic event originated at a depth of 10 kilometers, occurring at 20:54 UTC.
Why it matters
The tremor prompted online debate regarding its proximity to the mainland after viral social media posts incorrectly claimed the event occurred just 500 kilometers from the coast.
The USGS measured the earthquake at magnitude 5.7, while GEOFON assigned it a magnitude of 5.5. The event occurred at a depth of 10 kilometers, significantly below the 6.5 magnitude threshold required to typically trigger a tsunami.
The players
United States Geological Survey
This is a scientific agency of the United States government that monitors seismic activity and provides public data on earthquakes.
GEOFON
This is an international seismic network operated by the GFZ German Research Centre for Geosciences that provides real-time earthquake information.
The details
Seismic monitoring agencies determined the epicentre was 1,673 kilometers south-southeast of Gqeberha. Simultaneously, a separate 6.4 magnitude earthquake occurred near Kainantu in Papua New Guinea at a depth of 104 kilometers on the same day.
Timeline
The earthquake occurred at 20:54 UTC on 20 September 2026.
Deeper Dive
The recorded 5.7 magnitude of this earthquake confirms it falls well below the established 6.5 magnitude threshold for tsunami risk.
The earthquake posed no tsunami threat to coastal regions like Gqeberha due to its magnitude being below the standard 6.5 threshold. Residents and travelers in the area can expect no change to normal maritime or coastal safety protocols.
The takeaway
Distinguishing between verified seismic data and viral social media claims is essential for accurate public perception of natural events. Seismic monitoring remains the only reliable source for determining the actual risk and location of ocean-based tremors.
Further reading
For more information on seismic activity and tectonic movements, see the Geology section.
Live Poll
Do you trust information about natural disasters shared on social media without verifying with official sources?
