M4.7 Earthquake 92 km SE of Alo, Wallis and Futuna — July 20, 2022
2022-07-20 21:05:33 UTC (2022-07-20) · approx. 9:05 AM UTC-12 local
On July 20, 2022 at 21:05 UTC, a magnitude 4.7 shallow crustal earthquake struck 92 km SE of Alo, Wallis and Futuna, at a depth of 9.9 km and coordinates -14.9897°, -177.6164°. This earthquake was detected by 39 seismic stations with good location accuracy and was assigned a USGS significance rating of 340, 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.
Earthquake Details
-177.6164°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 4.7 earthquake near Alo, Wallis and Futuna?
The magnitude 4.7 earthquake that struck 92 km SE of Alo, Wallis and Futuna on July 20, 2022 at 21:05 UTC had a depth of 9.9 km. For context, this was a light earthquake commonly felt near the epicenter.
Where did the earthquake occur?
The earthquake epicenter was located at -14.9897°, -177.6164°, which is 92 km SE of Alo, Wallis and Futuna.
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.
Actions
Authoritative source: USGS event page (event ID: us6000i6he). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2022, July 20, 2022). M4.7 Earthquake 92 km SE of Alo, Wallis and Futuna — July 20, 2022. Retrieved September 27, 2022 from https://www.earthquaketracker.org/earthquakes/event/us6000i6he/