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Moderate mag. 5.6 earthquake - Coral Sea, 48 km east of Santo, Luganville, Sanma Province, Vanuatu, on Saturday, Nov 20, 2021 at 9:57 pm (GMT +11) -

Moderate mag. 5.6 earthquake - Coral Sea, 48 km east of Santo, Luganville, Sanma Province, Vanuatu, on Saturday, Nov 20, 2021 at 9:57 pm (GMT +11) Moderate mag. 5.6 earthquake - Coral Sea, 48 km east of Santo, Luganville, Sanma Province, Vanuatu, on Saturday, Nov 20, 2021 at 9:57 pm (GMT +11)

Moderate magnitude 5.6 earthquake at 128 km depth

20 Nov 11:03 UTC: First to report: VolcanoDiscovery after 6 minutes.
20 Nov 11:06: Now using data updates from GFZ
20 Nov 11:17: Now using data updates from USGS
20 Nov 18:28: Magnitude recalculated from 5.5 to 5.6. Hypocenter depth recalculated from 128.9 to 127.9 km (from 80 to 79 mi). Epicenter location corrected by 1.2 km (0.8 mi) towards ESE.
Update Sat, 20 Nov 2021, 11:12

Magnitude 5.3 earthquake strikes near Santo, Luganville, Sanma Province, Vanuatu

5.3 quake 20 Nov 9:57 pm (GMT +11)
5.3 quake 20 Nov 9:57 pm (GMT +11)
An earthquake of magnitude 5.3 occurred in the evening on Saturday, November 20th, 2021, at 9:57 pm local time near Santo, Luganville, Sanma Province, Vanuatu, as reported by the German Research Centre for Geosciences (GFZ).
According to preliminary data, the quake was located at an intermediate depth of 123 km. The strength of the earthquake may have been tempered by its relative great depth below the surface, which makes it feel weaker in absolute terms. The exact magnitude, epicenter, and depth of the quake might be revised within the next few hours or minutes as seismologists review data and refine their calculations, or as other agencies issue their report.
Our monitoring service identified a second report from the European-Mediterranean Seismological Centre (EMSC) which listed the quake at magnitude 5.2.
Based on the preliminary seismic data, the quake should not have caused any significant damage, but was probably felt by many people as light vibration in the area of the epicenter.
Weak shaking might have been felt in Santo (pop. 13,400) located 48 km from the epicenter, Norsup (pop. 3,000) 52 km away, and Port-Olry (pop. 2,000) 87 km away.
VolcanoDiscovery will automatically update magnitude and depth if these change and follow up if other significant news about the quake become available. If you're in the area, please send us your experience through our reporting mechanism, either online or via our mobile app. This will help us provide more first-hand updates to anyone around the globe who wants to know more about this quake.

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Earthquake details

Date & timeNov 20, 2021 10:57:53 UTC -
Local time at epicenterSaturday, Nov 20, 2021 at 9:57 pm (GMT +11)
Depth127.9 km
Epicenter latitude / longitude15.6075°S / 167.6032°E (Coral Sea, Vanuatu)
Antipode15.608°N / 12.397°W
Shaking intensityLight shaking
Felt6 reports
Primary data sourceUSGS (United States Geological Survey)
Nearest volcanoAoba (34 km / 21 mi)
Nearby towns and cities48 km (30 mi) E of Santo (Luganville) (pop: 13,400) | Show on map | Quakes nearby
55 km (34 mi) NNE of Norsup (pop: 3,000) | Show on map | Quakes nearby
85 km (53 mi) SE of Port-Olry (pop: 1,950) | Show on map | Quakes nearby
193 km (120 mi) S of Sola (pop: 1,170) | Show on map | Quakes nearby
249 km (154 mi) NNW of Port Vila (pop: 35,900) | Show on map | Quakes nearby
48 km (30 mi) E of St. Bartholomew Island (pop: 4,270) | Show on map | Quakes nearby
64 km (40 mi) WNW of Pentecost Island (pop: 16,800) | Show on map | Quakes nearby
74 km (46 mi) N of Malakula Island (pop: 22,900) | Show on map | Quakes nearby
Weather at epicenter at time of quakeModerate Rain 27.1°C (81 F), humidity: 72%, wind: 3 m/s (7 kts) from N
Estimated seismic energy released1.6 x 1013 joules (4.4 gigawatt hours, equivalent to 3788 tons of TNT or 0.2 atomic bombs!) | about seismic energy
Show interactive Map
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Data for the same earthquake reported by different agencies

Info: The more agencies report about the same quake and post similar data, the more confidence you can have in the data. It takes normally up to a few hours until earthquake parameters are calculated with near-optimum precision.
5.6128 km47 Km E of Luganville, VanuatuUSGS
5.3156 kmVanuatu: Near NouméaRENASS
5.6133 kmVanuatu IslandsGFZ
5.6122 kmVanuatu IslandsGeoAu
5.7120 kmVanuatu IslandsBMKG
5.6128 kmVanuatu IslandsRaspberryShake


Seismic station: Honiara, Solomon Islands (HNR/IU network) | Distance from quake: 1077 km / 669 mi | Show on map | Station Info
Seismic station Honiara, Solomon Islands: vertical movement plot around time of quake (source: IRIS/BUD)
Seismogram (vertical component) around time of quake. Thin dotted red line indicates time of quake. Seismic waves arrive some time later, depending on distance. Source: IRIS Buffer of Uniform Data (BUD) webtool
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User reports for this quake (6)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
Leave a comment if you find a particular report interesting or want to add to it.
Flag as inappropriate.
Mark as helpful or interesting.
Send your own user report!
Santo (47.9 km WNW of epicenter) [Map] / Light shaking (MMI IV) / rattling, vibrating / 5-10 s
Aore island (43.1 km W of epicenter) [Map] / Light shaking (MMI IV) / 15-20 s : First vibration approx 10 secs followed by light to moderate horizontal movement of house  
29 km of Port-Olry, Sanma (84.8 km WNW of epicenter) [Map] / Very weak shaking (MMI II) / single lateral shake / 1-2 s : J'ai eu peur  
luganville (47.3 km WNW of epicenter) [Map] / Moderate shaking (MMI V) / rattling, vibrating / 10-15 s
Luganville (57.1 km W of epicenter) [Map] / Strong shaking (MMI VI) / horizontal (sideways) swinging / 10-15 s : Sudden shake !  
Santo (46.4 km WNW of epicenter) [Map] / Moderate shaking (MMI V) / rattling, vibrating / 10-15 s


[More info]

Recorded aftershocks, latest first (0 quake)

So far, no aftershocks have been registered.

Earlier earthquakes in the same area

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