M4.5 Earthquake 174 km S of Kroya, Indonesia — October 31, 2020
2020-10-31 21:38:01 UTC (2020-10-31) · approx. 4:38 AM UTC+7 local
Felt by 1 person across nearby locations.
On October 31, 2020 at 21:38 UTC, a magnitude 4.5 shallow crustal earthquake struck 174 km S of Kroya, Indonesia, at a depth of 37.1 km and coordinates -9.1872°, 108.9762°.
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.
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
Did You Feel It? — community-reported shaking
Aggregated felt-report intensity from 1 citizen response to the USGS Did You Feel It? system. Each colored zone represents the average MMI from reports in that area.
Source: U.S. Geological Survey Did You Feel It?. View on USGS · submit your own report
Earthquake Details
108.9762°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 4.5 earthquake near Kroya, Indonesia?
The magnitude 4.5 earthquake that struck 174 km S of Kroya, Indonesia on October 31, 2020 at 21:38 UTC had a depth of 37.1 km. For context, this was a light earthquake commonly felt near the epicenter.
Where did the earthquake occur?
The earthquake epicenter was located at -9.1872°, 108.9762°, which is 174 km S of Kroya, Indonesia. View all earthquakes in Indonesia.
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.
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 4.5 event is significantly smaller than that historical record.
Authoritative source: USGS event page (event ID: us7000c8rt). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2020, October 31, 2020). M4.5 Earthquake 174 km S of Kroya, Indonesia — October 31, 2020. Retrieved January 18, 2021 from https://www.earthquaketracker.org/earthquakes/event/us7000c8rt/