M4.6 Earthquake 161 km ESE of Biak, Indonesia — August 12, 2022
2022-08-12 03:13:01 UTC (2022-08-12) · approx. 12:13 PM UTC+9 local
On August 12, 2022 at 03:13 UTC, a magnitude 4.6 shallow crustal earthquake struck 161 km ESE of Biak, Indonesia, at a depth of 35.5 km and coordinates -1.9584°, 137.3046°. This earthquake was detected by 37 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.
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
137.3046°E
Technical Information
Common Questions
How strong was the magnitude 4.6 earthquake near Biak, Indonesia?
The magnitude 4.6 earthquake that struck 161 km ESE of Biak, Indonesia on August 12, 2022 at 03:13 UTC had a depth of 35.5 km. For context, this was a light earthquake commonly felt near the epicenter.
Where did the earthquake occur?
The earthquake epicenter was located at -1.9584°, 137.3046°, which is 161 km ESE of Biak, Indonesia. View all earthquakes in Indonesia.
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.
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 4.6 event is significantly smaller than that historical record.
Authoritative source: USGS event page (event ID: us6000ia3g). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2022, August 12, 2022). M4.6 Earthquake 161 km ESE of Biak, Indonesia — August 12, 2022. Retrieved January 18, 2024 from https://www.earthquaketracker.org/earthquakes/event/us6000ia3g/