M5.3 Earthquake 121 km ESE of ?Ohonua, Tonga — February 4, 2023
2023-02-04 05:09:36 UTC (2023-02-04) · approx. 5:09 PM UTC-12 local
Felt by 1 person across nearby locations.
On February 4, 2023 at 05:09 UTC, a magnitude 5.3 shallow crustal earthquake struck 121 km ESE of ?Ohonua, Tonga, at a depth of 10.0 km and coordinates -21.8457°, -173.9128°. This earthquake was detected by 62 seismic stations with excellent location accuracy and was assigned a USGS significance rating of 432, placing it among routine seismic activity.
Physical scale: An earthquake of magnitude 5.3 releases seismic energy equivalent to roughly 1 kilotons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 2.7 km — a useful intuition for the size of the slip patch on the fault.
The epicenter is located in Tonga, a region characterized by the Tonga-Kermadec subduction zone, where the Pacific Plate descends at up to 240 mm per year — the fastest plate convergence on Earth. The nearest mapped fault system is the Tonga Trench. View all earthquakes in Tonga.
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
-173.9128°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 5.3 earthquake near ?Ohonua, Tonga?
The magnitude 5.3 earthquake that struck 121 km ESE of ?Ohonua, Tonga on February 4, 2023 at 05:09 UTC had a depth of 10.0 km. For context, this was a moderate earthquake that could be widely felt.
Where did the earthquake occur?
The earthquake epicenter was located at -21.8457°, -173.9128°, which is 121 km ESE of ?Ohonua, Tonga. View all earthquakes in Tonga.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 5.3 earthquakes can continue for days to weeks and gradually diminish over time.
Has Tonga had earthquakes this big before?
The largest recorded earthquake in Tonga was the M8.1 Tonga Trench earthquake of June 26, 1917. Today's magnitude 5.3 event is significantly smaller than that historical record.
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Location
Authoritative source: USGS event page (event ID: us6000jlc7). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, February 4, 2023). M5.3 Earthquake 121 km ESE of ?Ohonua, Tonga — February 4, 2023. Retrieved January 18, 2024 from https://www.earthquaketracker.org/earthquakes/event/us6000jlc7/