M5.0 Earthquake 76 km WSW of Port-Olry, Vanuatu — July 31, 2021
2021-07-31 08:05:16 UTC (2021-07-31) · approx. 7:05 PM UTC+11 local
Felt by 1 person across nearby locations.
On July 31, 2021 at 08:05 UTC, a magnitude 5.0 shallow crustal earthquake struck 76 km WSW of Port-Olry, Vanuatu, at a depth of 10.0 km and coordinates -15.3304°, 166.4290°.
Physical scale: An earthquake of magnitude 5.0 releases seismic energy equivalent to roughly 477 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 1.7 km — a useful intuition for the size of the slip patch on the fault.
The epicenter is located in Vanuatu, a region characterized by the New Hebrides subduction zone, where the Australian Plate subducts eastward at approximately 90 mm per year. View all earthquakes in Vanuatu.
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
166.4290°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 5.0 earthquake near Port-Olry, Vanuatu?
The magnitude 5.0 earthquake that struck 76 km WSW of Port-Olry, Vanuatu on July 31, 2021 at 08:05 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 -15.3304°, 166.4290°, which is 76 km WSW of Port-Olry, Vanuatu. View all earthquakes in Vanuatu.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 5.0 earthquakes can continue for days to weeks and gradually diminish over time.
Has Vanuatu had earthquakes this big before?
The largest recorded earthquake in Vanuatu was the M7.9 Vanuatu earthquake of October 7, 2009. Today's magnitude 5.0 event is significantly smaller than that historical record.
Authoritative source: USGS event page (event ID: us6000f0xu). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, July 31, 2021). M5.0 Earthquake 76 km WSW of Port-Olry, Vanuatu — July 31, 2021. Retrieved October 14, 2021 from https://www.earthquaketracker.org/earthquakes/event/us6000f0xu/