# Séisme mineur mag. 1.8 - Ionian Sea, 12 km au nord-est de Patras, Achaea, Grece-Occidentale, Grèce, vendredi, 24 sept. 2021 09:58 (GMT +3) - writeAge(1632466727)

Quakes around its antipode during the following 3 jours
Check different time intervals: 24 hours | 2 days
Date & heure: 24 Sep 2021 06:58:47 UTC -
Heure locale à l'épicentre: vendredi, 24 sept. 2021 09:58 (GMT +3)
Magnitude: 1.8
Profondeur: 24 km
Épicentre latitude / longitude: 38.3272°N / 21.8156°E (Ionian Sea, Grece-Occidentale, Grèce)
Antipode sismique latitude / longitude: 38.327°S / 158.184°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 15. This is compared to the average number of 17.87 quakes during preceding intervals of 3 jours with a standard deviation (σ) of 35.1, calculated by analzing all 100 preceding intervals of 3 jours for the same region.
Interpretation:
Note: At a magnitude of 1.8, 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 jours.
 Mag class Total # Average σ Observed deviation 6+ 0 0.3 1.3 -0.3 (-0.2σ) 5+ 3 3.6 9.7 -0.6 (-0.1σ) 4+ 9 8.2 9.3 0.8 (0.1σ) 3+ 3 5.8 17.6 -2.8 (-0.2σ) Total 15 17.87 35.1 -2.9 (-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

Filtrer par magnitude:
Tous
3.0+
4.0+
5.0+
Showing quakes magnitude 3.0 or higher (total: 15).
 Date et l'heure MagProfondeur Lieu Détail 24 Sep 2021 07:57:38 GMT(59 minutes after quake) 5.012 km New Zealand [Show on map] Plus 24 Sep 2021 11:33:20 GMT(5 heures after quake) 4.1547 km South of the Fiji Islands [Show on map] Plus 24 Sep 2021 15:53:08 GMT(9 heures after quake) 4.3345 km New Zealand [Show on map] Plus 24 Sep 2021 19:05:59 GMT(12 heures after quake) 4.2519 km Fiji: 258 Km WNW of Haveluloto, Tonga [Show on map] Plus 25 Sep 2021 01:29:10 GMT(19 heures after quake) 3.385 km New Zealand [Show on map] Plus 25 Sep 2021 01:33:05 GMT(19 heures after quake) 3.412 km New Zealand [Show on map] Plus 25 Sep 2021 13:42:44 GMT(1 jour 7 heures after quake) 4.912 km New Zealand [Show on map] Plus 25 Sep 2021 14:30:59 GMT(1 jour 8 heures after quake) 4.810 km 37 Km SSE of Pangai, Tonga [Show on map] Plus 25 Sep 2021 15:45:08 GMT(1 jour 9 heures after quake) 4.710 km 59 Km S of Pangai, Tonga [Show on map] Plus 25 Sep 2021 15:48:09 GMT(1 jour 9 heures after quake) 4.2415 km New Zealand [Show on map] Plus 26 Sep 2021 02:43:45 GMT(1 jour 20 heures after quake) 5.0387 km New Zealand [Show on map] Plus 26 Sep 2021 11:04:33 GMT(2 jours after quake) 3.7328 km New Zealand [Show on map] Plus 26 Sep 2021 17:03:58 GMT(2 jours after quake) 4.833 km New Zealand [Show on map] Plus 26 Sep 2021 23:06:04 GMT(3 jours after quake) 5.112 km New Zealand [Show on map] Plus 27 Sep 2021 04:54:36 GMT(3 jours after quake) 4.533 km New Zealand [Show on map] Plus
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