M4.2 Earthquake 4 km SSE of Petrinja, Croatia — January 9, 2021
2021-01-09 21:29:09 UTC (2021-01-09) · approx. 10:29 PM UTC+1 local
Felt by 49 people across nearby locations.
On January 9, 2021 at 21:29 UTC, a magnitude 4.2 shallow crustal earthquake struck 4 km SSE of Petrinja, Croatia, at a depth of 5.4 km and coordinates 45.4060°, 16.3169°.
Physical scale: An earthquake of magnitude 4.2 releases seismic energy equivalent to roughly 30 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 476 m — a useful intuition for the size of the slip patch on the fault.
Did You Feel It? — community-reported shaking
Aggregated felt-report intensity from 49 citizen responses 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
16.3169°E
Technical Information
Common Questions
How strong was the magnitude 4.2 earthquake near Petrinja, Croatia?
The magnitude 4.2 earthquake that struck 4 km SSE of Petrinja, Croatia on January 9, 2021 at 21:29 UTC had a depth of 5.4 km. For context, this was a light earthquake commonly felt near the epicenter.
Where did the earthquake occur?
The earthquake epicenter was located at 45.4060°, 16.3169°, which is 4 km SSE of Petrinja, Croatia.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.2 earthquakes can continue for several days and gradually diminish over time.
Authoritative source: USGS event page (event ID: us6000d73g). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, January 9, 2021). M4.2 Earthquake 4 km SSE of Petrinja, Croatia — January 9, 2021. Retrieved July 23, 2022 from https://www.earthquaketracker.org/earthquakes/event/us6000d73g/