Moderate mag. 4.3 earthquake - Hurunui District, 79 km northwest of Christchurch, Canterbury, New Zealand, on Saturday, Feb 20, 2021 8:33 pm (GMT +13) -

Moderate mag. 4.3 earthquake - Hurunui District, 79 km northwest of Christchurch, Canterbury, New Zealand, on Saturday, Feb 20, 2021 8:33 pm (GMT +13)

Moderate magnitude 4.3 earthquake at 5 km depth

20 Feb 07:35 UTC: First to report: GEONET (NZ) after 2 minutes.
20 Feb 07:39: Magnitude recalculated from 4.2 to 4.3. Hypocenter depth recalculated from 6.3 to 5.0 km (from 3.9 to 3.1 mi).
Update Sat, 20 Feb 2021, 07:39
Moderate tremor of magnitude 4.2 just reported 78 km northwest of Christchurch, New Zealand
4.2 quake 20 Feb 8:33 pm (GMT +13)
4.2 quake 20 Feb 8:33 pm (GMT +13)
An earthquake of magnitude 4.2 occurred in the evening on Saturday 20 February 2021 at 8:33 pm local time near Christchurch, Christchurch City, Canterbury, New Zealand, as reported by New Zealand's Earthquake Commission and Geological Survey (GeoNet).
According to preliminary data, the quake was located at a very shallow depth of 6.3 km. Shallow earthquakes are felt more strongly than deeper ones as they are closer to the surface. 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.
A second report was later issued by the European-Mediterranean Seismological Centre (EMSC), which listed it as a magnitude 4.2 earthquake as well.
Towns or cities near the epicenter where the quake might have been felt as very weak shaking include Oxford (pop. 1,800) located 47 km from the epicenter, Amberley (pop. 1,100) 48 km away, Woodend (pop. 3,100) 58 km away, Kaiapoi (pop. 10,200) 63 km away, Darfield (pop. 1,600) 68 km away, and Christchurch (pop. 363,900) 78 km away.
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Earthquake data

Date & time: Feb 20, 2021 07:33:27 UTC -
Local time at epicenter: Saturday, Feb 20, 2021 8:33 pm (GMT +13)
Magnitude: 4.3
Depth: 5.0 km
Epicenter latitude / longitude: 42.87572°S / 172.26428°E (Hurunui District, Canterbury, New Zealand)
Antipode: 42.876°N / 7.736°W
Nearby towns and cities:
48 km (30 mi) N of Oxford (pop: 1,780) --> See nearby quakes!
49 km (30 mi) NW of Amberley (pop: 1,110) --> See nearby quakes!
54 km (34 mi) NNW of Rangiora (pop: 18,400) --> See nearby quakes!
64 km (40 mi) NNW of Kaiapoi (pop: 10,200) --> See nearby quakes!
69 km (43 mi) N of Darfield (pop: 1,590) --> See nearby quakes!
79 km (49 mi) NNW of Christchurch (pop: 363,900) --> See nearby quakes!
79 km (49 mi) N of Rolleston (pop: 3,120) --> See nearby quakes!
81 km (51 mi) NNW of Prebbleton (pop: 3,600) --> See nearby quakes!
122 km (76 mi) NNE of Ashburton (pop: 30,100) --> See nearby quakes!
272 km (169 mi) SW of Wellington (pop: 381,900) --> See nearby quakes!
Weather at epicenter at time of quake:
Clear Sky 8°C (46 F), humidity: 70%, wind: 3 m/s (6 kts) from NW
Primary data source: GEONET (NZ) (Earthquake Commission and Geological Survey, New Zealand)
Estimated released energy: 1.8 x 1011 joules (49.4 megawatt hours, equivalent to 42.5 tons of TNT) More info
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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.
4.35 kmNew ZealandGEONET (NZ)

User reports for this quake (2)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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Kaiapoi, Waimakariri District, Canterbury (65.5 km SSE of epicenter) [Map] / Very weak shaking (MMI II) / single vertical bump / very short : Barly felt. I know that area can produce big earthquakes. Let's hope there isn't a big one (reported through our app)  
Christchurch, Canterbury (78.6 km SSE of epicenter) [Map] / Very weak shaking (MMI II) (reported through our app)
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