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) -

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 classTotal #AverageσObserved deviation
6+00.31.3-0.3 (-0.2σ)
5+33.69.7-0.6 (-0.1σ)
4+98.29.30.8 (0.1σ)
3+35.817.6-2.8 (-0.2σ)
Total1517.8735.1-2.9 (-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'heureMag
Profondeur
LieuDétail
24 Sep 2021 07:57:38 GMT
(59 minutes after quake)
5.0

12 km
New Zealand [Show on map]Plus
24 Sep 2021 11:33:20 GMT
(5 heures after quake)
4.1

547 km
South of the Fiji Islands [Show on map]Plus
24 Sep 2021 15:53:08 GMT
(9 heures after quake)
4.3

345 km
New Zealand [Show on map]Plus
24 Sep 2021 19:05:59 GMT
(12 heures after quake)
4.2

519 km
Fiji: 258 Km WNW of Haveluloto, Tonga [Show on map]Plus
25 Sep 2021 01:29:10 GMT
(19 heures after quake)
3.3

85 km
New Zealand [Show on map]Plus
25 Sep 2021 01:33:05 GMT
(19 heures after quake)
3.4

12 km
New Zealand [Show on map]Plus
25 Sep 2021 13:42:44 GMT
(1 jour 7 heures after quake)
4.9

12 km
New Zealand [Show on map]Plus
25 Sep 2021 14:30:59 GMT
(1 jour 8 heures after quake)
4.8

10 km
37 Km SSE of Pangai, Tonga [Show on map]Plus
25 Sep 2021 15:45:08 GMT
(1 jour 9 heures after quake)
4.7

10 km
59 Km S of Pangai, Tonga [Show on map]Plus
25 Sep 2021 15:48:09 GMT
(1 jour 9 heures after quake)
4.2

415 km
New Zealand [Show on map]Plus
26 Sep 2021 02:43:45 GMT
(1 jour 20 heures after quake)
5.0

387 km
New Zealand [Show on map]Plus
26 Sep 2021 11:04:33 GMT
(2 jours after quake)
3.7

328 km
New Zealand [Show on map]Plus
26 Sep 2021 17:03:58 GMT
(2 jours after quake)
4.8

33 km
New Zealand [Show on map]Plus
26 Sep 2021 23:06:04 GMT
(3 jours after quake)
5.1

12 km
New Zealand [Show on map]Plus
27 Sep 2021 04:54:36 GMT
(3 jours after quake)
4.5

33 km
New Zealand [Show on map]Plus
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