# Séisme mineur mag. 2.0 - Ionian Sea, Grèce, dimanche, 17 oct. 2021 07:14 (GMT +3) - writeAge(1634444081)

Quakes around its antipode during the following 3 jours
Check different time intervals: 24 hours | 2 days
Date & heure: 17 Oct 2021 04:14:41 UTC -
Heure locale à l'épicentre: dimanche, 17 oct. 2021 07:14 (GMT +3)
Magnitude: 2
Profondeur: 18 km
Épicentre latitude / longitude: 37.4295°N / 20.7321°E (Ionian Sea, Grèce)
Antipode latitude / longitude: 37.43°S / 159.268°W
Source de données principale: NOA (National Observatory of Athens)
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## Quakes within 30 degrees from seismic antipode up to 3 jours 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 jours around the antipode of the quake was 6. This is compared to the average number of 0 quakes during preceding intervals of 3 jours with a standard deviation (σ) of 0.6, calculated by analzing all 100 preceding intervals of 3 jours for the same region.
Interpretation:
Note: At a magnitude of 2.0, 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 a weak increase in detected quakes around the antipode during the following 3 jours.
 Mag class Total # Average σ Observed deviation 6+ 0 0 0 n/a 5+ 1 0 0.1 1 (9.9σ) 4+ 3 0 0.3 3 (9.9σ) 3+ 2 0 0.2 2 (9.9σ) Total 6 0 0.6 6 (9.9σ)
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

Showing quakes magnitude 3.0 or higher (total: 6).
 Date et l'heure MagProfondeur Lieu Détail 18 Oct 2021 10:20:52 GMT(1 jour 6 heures after quake) 4.510 km 158 Km E of Neiafu, Tonga [Show on map] Plus 18 Oct 2021 14:37:07 GMT(1 jour 10 heures after quake) 3.8170 km New Zealand [Show on map] Plus 18 Oct 2021 15:13:46 GMT(1 jour 11 heures after quake) 3.112 km New Zealand [Show on map] Plus 19 Oct 2021 00:16:23 GMT(1 jour 20 heures after quake) 4.3265 km 107 Km W of Hihifo, Tonga [Show on map] Plus 19 Oct 2021 10:28:45 GMT(2 jours after quake) 5.010 km TONGA [Show on map] Plus 19 Oct 2021 17:30:39 GMT(3 jours after quake) 4.5168 km New Zealand [Show on map] Plus
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