Moderate mag. 4.3 earthquake - Tasman Sea, 209 km north of Invercargill, Southland, New Zealand, on Sunday, 28 Feb 2021 3:41 am (GMT +13) -
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Moderate magnitude 4.3 earthquake at 5 km depth
27 Feb 14:43 UTC: First to report: GEONET (NZ) after 2 minutes.
27 Feb 14:44: Magnitude recalculated from 3.7 to 3.9.
27 Feb 14:45: Magnitude recalculated from 3.9 to 4.0.
27 Feb 14:46: Magnitude recalculated from 4.0 to 4.3. Hypocenter depth recalculated from 14.8 to 5.0 km (from 9.2 to 3.1 mi). Epicenter location corrected by 14 km (8.7 mi) towards NW.
27 Feb 14:44: Magnitude recalculated from 3.7 to 3.9.
27 Feb 14:45: Magnitude recalculated from 3.9 to 4.0.
27 Feb 14:46: Magnitude recalculated from 4.0 to 4.3. Hypocenter depth recalculated from 14.8 to 5.0 km (from 9.2 to 3.1 mi). Epicenter location corrected by 14 km (8.7 mi) towards NW.
Update Sat, 27 Feb 2021, 14:48
Moderate 4.3 quake hits near Milford Sound, Southland District, Southland, New Zealand4.3 quake 28 Feb 3:41 am (GMT +13)
A magnitude 4.3 earthquake near Milford Sound, Southland District, Southland, New Zealand, was reported only 7 minutes ago by New Zealand's Earthquake Commission and Geological Survey (GeoNet), considered the main national agency that monitors seismic activity in New Zealand. The earthquake occurred at a very shallow depth of 5 km beneath the epicenter early morning on Sunday 28 February 2021 at 3:41 am local time. 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 4.0.
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 Milford Sound (pop. 440) located 24 km from the epicenter.
Other towns or cities near the epicenter where the quake might have been felt as very weak shaking include Te Anau (pop. 2,100) located 92 km from the epicenter, and Queenstown (pop. 10,400) 94 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.
Our monitoring service identified a second report from the European-Mediterranean Seismological Centre (EMSC) which listed the quake at magnitude 4.0.
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 Milford Sound (pop. 440) located 24 km from the epicenter.
Other towns or cities near the epicenter where the quake might have been felt as very weak shaking include Te Anau (pop. 2,100) located 92 km from the epicenter, and Queenstown (pop. 10,400) 94 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.
Earthquake data:
Date & time: 27 Feb 2021 14:41:17 UTC -
Local time at epicenter: Sunday, 28 Feb 2021 3:41 am (GMT +13)
Magnitude: 4.3
Depth: 5.0 km
Epicenter latitude / longitude: 44.58821°S / 167.64024°E
(Tasman Sea, Southland, New Zealand)Nearby towns and cities:
24 km (15 mi) WNW of Milford Sound (pop: 435) --> See nearby quakes!
92 km (57 mi) N of Te Anau (pop: 2,070) --> See nearby quakes!
94 km (59 mi) WNW of Queenstown (Otago) (pop: 10,400) --> See nearby quakes!
209 km (130 mi) NNW of Invercargill (pop: 47,300) --> See nearby quakes!
209 km (130 mi) NNW of Invercargill (pop: 47,300) --> See nearby quakes!
266 km (165 mi) WNW of Dunedin (Otago) (pop: 114,300) --> See nearby quakes!
287 km (179 mi) W of Timaru (Canterbury) (pop: 28,000) --> See nearby quakes!
335 km (208 mi) WSW of Ashburton (Canterbury) (pop: 30,100) --> See nearby quakes!
416 km (258 mi) WSW of Christchurch (Canterbury) (pop: 363,900) --> See nearby quakes!
687 km (427 mi) SW of Wellington (pop: 381,900) --> See nearby quakes!
Weather at epicenter at time of quake:
Broken Clouds
7.6°C (46 F), humidity: 100%, wind: 2 m/s (3 kts) from ESE
Primary data source: GEONET (NZ) (Earthquake Commission and Geological Survey, New Zealand)Broken Clouds
7.6°C (46 F), humidity: 100%, wind: 2 m/s (3 kts) from ESEEstimated released energy: 1.8 x 1011 joules (49.4 megawatt hours, equivalent to 42.5 tons of TNT) More info
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.
| Magnitude | Depth | Location | Source |
| 4.3 | 5 km | New Zealand | GEONET (NZ) |
| 4.0 | 15 km | 4.0 SOUTH ISLAND OF NEW ZEALAND | EMSC |
User reports for this quake (1)
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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!
1864.5 km WNW of epicenter [Map] / Severe shaking (MMI VIII) / vibration and rolling : Laying in bed with my body up against the wall , I feel swinging, bumps , vibration, and rolling in bouts of around 30secs numerous times over a 30min period from around 3.30 till 4pm
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