M4.3 Earthquake 49 km NNW of Labuan Bajo, Indonesia — September 19, 2022
2022-09-19 23:34:27 UTC (2022-09-19) · approx. 7:34 AM UTC+8 local
On September 19, 2022 at 23:34 UTC, a magnitude 4.3 intermediate depth earthquake struck 49 km NNW of Labuan Bajo, Indonesia, at a depth of 178.1 km and coordinates -8.0660°, 119.7559°.
Physical scale: An earthquake of magnitude 4.3 releases seismic energy equivalent to roughly 43 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 558 m — a useful intuition for the size of the slip patch on the fault.
This earthquake is part of an ongoing aftershock sequence following the magnitude 5.3 mainshock that occurred 12 days ago 54 km NNE of Labuan Bajo, Indonesia. Since the mainshock, the USGS has recorded 14 aftershocks in this area. Aftershock activity is expected to continue for days to weeks as stresses on surrounding faults redistribute.
Earthquake Details
119.7559°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 4.3 earthquake near Labuan Bajo, Indonesia?
The magnitude 4.3 earthquake that struck 49 km NNW of Labuan Bajo, Indonesia on September 19, 2022 at 23:34 UTC had a depth of 178.1 km. For context, this was a light earthquake commonly felt near the epicenter.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.3 earthquakes can continue for several days and gradually diminish over time.
Is this the same earthquake as the M5.3 one earlier?
No. This magnitude 4.3 earthquake is an aftershock of the larger magnitude 5.3 mainshock that occurred earlier 54 km NNE of Labuan Bajo, Indonesia. Aftershocks are smaller earthquakes triggered by stress changes from the mainshock.
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Understanding This Data
Magnitude 4.3 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us7000i9ec). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2022, September 19, 2022). M4.3 Earthquake 49 km NNW of Labuan Bajo, Indonesia — September 19, 2022. Retrieved November 26, 2022 from https://www.earthquaketracker.org/earthquakes/event/us7000i9ec/