M5.0 Earthquake near Pacific-Antarctic Ridge — September 18, 2023
2023-09-18 16:49:25 UTC (2023-09-18) · approx. 7:49 AM UTC-9 local
On September 18, 2023 at 16:49 UTC, a magnitude 5.0 shallow crustal earthquake struck near Pacific-Antarctic Ridge, at a depth of 10.0 km and coordinates -55.3686°, -128.5952°. This earthquake was detected by 39 seismic stations with excellent location accuracy and was assigned a USGS significance rating of 385, placing it among routine seismic activity.
Physical scale: An earthquake of magnitude 5.0 releases seismic energy equivalent to roughly 477 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 1.7 km — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-128.5952°E
Technical Information
Common Questions
How strong was the magnitude 5.0 earthquake near Pacific-Antarctic Ridge?
The magnitude 5.0 earthquake that struck near Pacific-Antarctic Ridge on September 18, 2023 at 16:49 UTC had a depth of 10.0 km. For context, this was a moderate earthquake that could be widely felt.
Where did the earthquake occur?
The earthquake epicenter was located at -55.3686°, -128.5952°, which is near Pacific-Antarctic Ridge.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 5.0 earthquakes can continue for days to weeks and gradually diminish over time.
Actions
Authoritative source: USGS event page (event ID: us7000kwiw). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, September 18, 2023). M5.0 Earthquake near Pacific-Antarctic Ridge — September 18, 2023. Retrieved December 2, 2023 from https://www.earthquaketracker.org/earthquakes/event/us7000kwiw/