M4.7 Earthquake 8 km NE of Orkney, South Africa — August 19, 2022
2022-08-19 18:24:32 UTC (2022-08-19) · approx. 8:24 PM UTC+2 local
Felt by 4 people across nearby locations.
On August 19, 2022 at 18:24 UTC, a magnitude 4.7 shallow crustal earthquake struck 8 km NE of Orkney, South Africa, at a depth of 5.0 km and coordinates -26.9279°, 26.7347°. This earthquake was detected by 73 seismic stations with excellent location accuracy and was assigned a USGS significance rating of 341, placing it among routine seismic activity.
Physical scale: An earthquake of magnitude 4.7 releases seismic energy equivalent to roughly 169 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 1.1 km — a useful intuition for the size of the slip patch on the fault.
Did You Feel It? — community-reported shaking
Aggregated felt-report intensity from 4 citizen responses to the USGS Did You Feel It? system. Each colored zone represents the average MMI from reports in that area.
Source: U.S. Geological Survey Did You Feel It?. View on USGS · submit your own report
Earthquake Details
26.7347°E
Technical Information
Common Questions
How strong was the magnitude 4.7 earthquake near Orkney, South Africa?
The magnitude 4.7 earthquake that struck 8 km NE of Orkney, South Africa on August 19, 2022 at 18:24 UTC had a depth of 5.0 km. For context, this was a light earthquake commonly felt near the epicenter.
Where did the earthquake occur?
The earthquake epicenter was located at -26.9279°, 26.7347°, which is 8 km NE of Orkney, South Africa.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.7 earthquakes can continue for several days and gradually diminish over time.
Authoritative source: USGS event page (event ID: us6000ic78). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2022, August 19, 2022). M4.7 Earthquake 8 km NE of Orkney, South Africa — August 19, 2022. Retrieved October 28, 2022 from https://www.earthquaketracker.org/earthquakes/event/us6000ic78/