M4.8 Earthquake 39 km WNW of Sumbawa Besar, Indonesia — August 9, 2022
2022-08-09 13:04:40 UTC (2022-08-09) · approx. 9:04 PM UTC+8 local
On August 9, 2022 at 13:04 UTC, a magnitude 4.8 shallow crustal earthquake struck 39 km WNW of Sumbawa Besar, Indonesia, at a depth of 11.1 km and coordinates -8.3010°, 117.1131°. This earthquake was detected by 21 seismic stations with excellent location accuracy and was assigned a USGS significance rating of 354, placing it among routine seismic activity.
Physical scale: An earthquake of magnitude 4.8 releases seismic energy equivalent to roughly 239 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 1.2 km — a useful intuition for the size of the slip patch on the fault.
The epicenter is located in Indonesia, a region characterized by the convergence of the Indo-Australian, Eurasian, and Philippine Sea plates, forming the Sunda-Banda arc system. The nearest mapped fault system is the Sunda megathrust. View all earthquakes in Indonesia.
Learn more: Magnitude scale · Aftershock sequences
Earthquake Details
117.1131°E
Technical Information
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Common Questions
How strong was the magnitude 4.8 earthquake near Sumbawa Besar, Indonesia?
The magnitude 4.8 earthquake that struck 39 km WNW of Sumbawa Besar, Indonesia on August 9, 2022 at 13:04 UTC had a depth of 11.1 km. For context, this was a light earthquake commonly felt near the epicenter.
Where did the earthquake occur?
The earthquake epicenter was located at -8.3010°, 117.1131°, which is 39 km WNW of Sumbawa Besar, Indonesia. View all earthquakes in Indonesia.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.8 earthquakes can continue for several days and gradually diminish over time.
Has Indonesia had earthquakes this big before?
The largest recorded earthquake in Indonesia was the M9.1 Indian Ocean earthquake of December 26, 2004. Today's magnitude 4.8 event is significantly smaller than that historical record.
Authoritative source: USGS event page (event ID: us7000i7sa). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2022, August 9, 2022). M4.8 Earthquake 39 km WNW of Sumbawa Besar, Indonesia — August 9, 2022. Retrieved October 21, 2022 from https://www.earthquaketracker.org/earthquakes/event/us7000i7sa/