M4.9 Earthquake 170 km NE of Georgetown, Saint Helena — June 22, 2024
2024-06-22 07:45:57 UTC (2024-06-22) · approx. 6:45 AM UTC-1 local
On June 22, 2024 at 07:45 UTC, a magnitude 4.9 shallow crustal earthquake struck 170 km NE of Georgetown, Saint Helena, at a depth of 10.0 km and coordinates -6.9973°, -13.1810°. This earthquake was detected by 34 seismic stations with excellent location accuracy and was assigned a USGS significance rating of 369, placing it among routine seismic activity.
Physical scale: An earthquake of magnitude 4.9 releases seismic energy equivalent to roughly 338 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 1.4 km — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-13.1810°E
Technical Information
Common Questions
How strong was the magnitude 4.9 earthquake near Georgetown, Saint Helena?
The magnitude 4.9 earthquake that struck 170 km NE of Georgetown, Saint Helena on June 22, 2024 at 07:45 UTC had a depth of 10.0 km. For context, this was a light earthquake commonly felt near the epicenter.
Where did the earthquake occur?
The earthquake epicenter was located at -6.9973°, -13.1810°, which is 170 km NE of Georgetown, Saint Helena.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.9 earthquakes can continue for several days and gradually diminish over time.
Actions
Authoritative source: USGS event page (event ID: us7000mtxp). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2024, June 22, 2024). M4.9 Earthquake 170 km NE of Georgetown, Saint Helena — June 22, 2024. Retrieved August 30, 2024 from https://www.earthquaketracker.org/earthquakes/event/us7000mtxp/