# Light mag. 3.1 earthquake - 7.2 km east of Christchurch, Canterbury, New Zealand, on Wednesday, April 21, 2021 at 03:21 (GMT) - writeAge(1618975302)

Quakes around its antipode during the following 3 days
Check different time intervals: 24 hours | 2 days
Date & time: 21 Apr 2021 03:21:42 UTC -
Magnitude: 3.1
Depth: 4.5 km
Epicenter latitude / longitude: 43.5164°S / 172.7201°E (Christchurch City, Canterbury, New Zealand)
Antipode latitude / longitude: 43.516°N / 7.28°W (Spain)
Primary data source: GEONET (NZ) (Earthquake Commission and Geological Survey, New Zealand)
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## Quakes within 30 degrees from seismic antipode up to 3 days after the quake

The area around the antipode is marked with the big circle on the map.
The total number of quakes that occurred within 3 days around the antipode of the quake was 18. This is compared to the average number of 20.45 quakes during preceding intervals of 3 days with a standard deviation (σ) of 41.9, calculated by analzing all 100 preceding intervals of 3 days for the same region.
Interpretation:
Note: At a magnitude of 3.1, it is unlikely that this quake could affect areas around its antipode. If an increase or decrease of quake is detected, it is likely caused by other factors.
There is no significant variation in the number of quakes that occurred around the antipode within 3 days.
 Mag class Total # Average σ Observed deviation 6+ 0 0 0.2 -0 (-0.2σ) 5+ 0 0.3 0.7 -0.3 (-0.4σ) 4+ 3 2.2 5 0.8 (0.2σ) 3+ 15 17.9 36.5 -2.9 (-0.1σ) Total 18 20.45 41.9 -2.5 (-0.1σ)
Explanation:
BLACK = Number of quakes within normal statistical range
RED = Significantly lower than normal number of quakes
GREEN = Significantly higher than normal number of quakes

## List of quakes

Filter by magnitude:
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3.0+
4.0+
Showing quakes magnitude 3.0 or higher (total: 18).
 Date and time MagDepth Location Details 21 Apr 2021 05:46:41 GMT(2 hours and 25 minutes after quake) 3.5132 km 8 Km NW From Nissiros, Greece [Show on map] More 21 Apr 2021 06:10:18 GMT(2 hours and 49 minutes after quake) 3.010.9 km Costa Adriatica Brindisina (Brindisi), Italy [Show on map] More 21 Apr 2021 15:28:39 GMT(12 hours after quake) 3.00 km ALBOR, Morocco [Show on map] More 21 Apr 2021 21:17:42 GMT(18 hours after quake) 4.212 km WESTERN TURKEY [Show on map] More 21 Apr 2021 22:39:28 GMT(19 hours after quake) 3.310 km 46 Km SSW From Arvi, Greece [Show on map] More 22 Apr 2021 04:16:45 GMT(1 day 1 hours after quake) 3.71 km ATLÁNTICO [Show on map] More 22 Apr 2021 11:59:54 GMT(1 day 9 hours after quake) 3.03.8 km 17 Km SW From Elassona, Greece [Show on map] More 22 Apr 2021 12:07:47 GMT(1 day 9 hours after quake) 4.310 km Iceland Region [Show on map] More 22 Apr 2021 12:39:17 GMT(1 day 9 hours after quake) 3.211 km Adriatico Centrale (MARE), Croatia [Show on map] More 22 Apr 2021 16:41:51 GMT(1 day 13 hours after quake) 3.15.7 km 17 Km SSW From Elassona, Greece [Show on map] More 22 Apr 2021 21:48:54 GMT(1 day 18 hours after quake) 3.021 km 17 Km WSW From Gavdhos, Greece [Show on map] More 23 Apr 2021 01:24:29 GMT(1 day 22 hours after quake) 3.710 km 34 Km SE From Skiros, Greece [Show on map] More 23 Apr 2021 02:59:19 GMT(1 day 24 hours after quake) 4.22 km MADEIRA ISLANDS, PORTUGAL REGION, Morocco [Show on map] More 23 Apr 2021 11:46:53 GMT(2 days after quake) 3.910 km ATL [Show on map] More 23 Apr 2021 16:30:31 GMT(3 days after quake) 3.85 km Austria [Show on map] More 23 Apr 2021 17:10:32 GMT(3 days after quake) 3.37.8 km 7 Km NE From Samos, Greece [Show on map] More 23 Apr 2021 20:51:27 GMT(3 days after quake) 3.04.6 km Near Châteauroux, France [Show on map] More 23 Apr 2021 22:53:03 GMT(3 days after quake) 3.89 km WESTERN TURKEY [Show on map] More
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