M4.5 Earthquake in the Mariana Islands region — September 19, 2024
2024-09-19 22:31:39 UTC (2024-09-19) · approx. 8:31 AM UTC+10 local
On September 19, 2024 at 22:31 UTC, a magnitude 4.5 shallow crustal earthquake struck in the Mariana Islands region, at a depth of 37.2 km and coordinates 20.7810°, 146.1310°. This earthquake was detected by 61 seismic stations with good location accuracy and was assigned a USGS significance rating of 312, placing it among routine seismic activity.
Physical scale: An earthquake of magnitude 4.5 releases seismic energy equivalent to roughly 85 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 767 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
146.1310°E
Technical Information
Common Questions
How strong was the magnitude 4.5 earthquake in the Mariana Islands region?
The magnitude 4.5 earthquake that struck in the Mariana Islands region on September 19, 2024 at 22:31 UTC had a depth of 37.2 km. For context, this was a light earthquake commonly felt near the epicenter.
Where did the earthquake occur?
The earthquake epicenter was located at 20.7810°, 146.1310°, which is in the Mariana Islands region.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.5 earthquakes can continue for several days and gradually diminish over time.
Actions
Authoritative source: USGS event page (event ID: us6000ntw4). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2024, September 19, 2024). M4.5 Earthquake in the Mariana Islands region — September 19, 2024. Retrieved November 23, 2024 from https://www.earthquaketracker.org/earthquakes/event/us6000ntw4/