Séisme mineur mag. 1.9 - 17 km à l'ouest de Volos, Magnesia, Thessaly, Grèce, samedi, 25 sept. 2021 11:17 (GMT +3) -

Quakes around its antipode during the following 3 jours
Check different time intervals: 24 hours | 2 days
Date & heure: 25 Sep 2021 08:17:42 UTC -
Heure locale à l'épicentre: samedi, 25 sept. 2021 11:17 (GMT +3)
Magnitude: 1.9
Profondeur: 10 km
Épicentre latitude / longitude: 39.3555°N / 22.743°E (Magnesia, Thessaly, Grèce)
Antipode sismique latitude / longitude: 39.356°S / 157.257°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 13. This is compared to the average number of 17.24 quakes during preceding intervals of 3 jours with a standard deviation (σ) of 33.2, calculated by analzing all 100 preceding intervals of 3 jours for the same region.
Note: At a magnitude of 1.9, 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+00.31-0.3 (-0.3σ)
5+23.57.8-1.5 (-0.2σ)
4+ (0.2σ)
3+25.917.9-3.9 (-0.2σ)
Total1317.2433.2-4.2 (-0.1σ)
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:
Showing quakes magnitude 3.0 or higher (total: 13).
Date et l'heureMag
25 Sep 2021 13:42:44 GMT
(5 heures after quake)

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

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

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

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

387 km
New Zealand [Show on map]Plus
26 Sep 2021 11:04:33 GMT
(1 jour 3 heures after quake)

328 km
New Zealand [Show on map]Plus
26 Sep 2021 17:03:58 GMT
(1 jour 9 heures after quake)

33 km
New Zealand [Show on map]Plus
26 Sep 2021 23:06:04 GMT
(1 jour 15 heures after quake)

12 km
New Zealand [Show on map]Plus
27 Sep 2021 04:54:36 GMT
(1 jour 21 heures after quake)

33 km
New Zealand [Show on map]Plus
27 Sep 2021 11:15:42 GMT
(2 jours after quake)

12 km
New Zealand [Show on map]Plus
27 Sep 2021 14:06:54 GMT
(2 jours after quake)

10 km
156 Km NW of Nuku‘alofa, Tonga [Show on map]Plus
28 Sep 2021 00:41:54 GMT
(3 jours after quake)

33 km
New Zealand [Show on map]Plus
28 Sep 2021 08:11:48 GMT
(3 jours after quake)

242 km
New Zealand [Show on map]Plus
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