M4.6 Earthquake west of the Galapagos Islands — August 21, 2023
2023-08-21 22:06:19 UTC (2023-08-21) · approx. 3:06 PM UTC-7 local
On August 21, 2023 at 22:06 UTC, a magnitude 4.6 shallow crustal earthquake struck west of the Galapagos Islands, at a depth of 10.0 km and coordinates 2.2734°, -99.9410°. This earthquake was detected by 43 seismic stations with good location accuracy and was assigned a USGS significance rating of 326, placing it among routine seismic activity.
Physical scale: An earthquake of magnitude 4.6 releases seismic energy equivalent to roughly 120 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 899 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-99.9410°E
Technical Information
Common Questions
How strong was the magnitude 4.6 earthquake west of the Galapagos Islands?
The magnitude 4.6 earthquake that struck west of the Galapagos Islands on August 21, 2023 at 22:06 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 2.2734°, -99.9410°, which is west of the Galapagos Islands.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.6 earthquakes can continue for several days and gradually diminish over time.
Actions
Authoritative source: USGS event page (event ID: us7000kri6). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, August 21, 2023). M4.6 Earthquake west of the Galapagos Islands — August 21, 2023. Retrieved January 18, 2024 from https://www.earthquaketracker.org/earthquakes/event/us7000kri6/