# Séisme très faible mag. 3.8 - 45 km au nord de Crucecita, Santa Maria Huatulco, État de Oaxaca, Mexique, dimanche, 19 sept. 2021 16:46 (GMT -5) - writeAge(1632087978)

Quakes around its antipode during the following 3 jours
Check different time intervals: 24 hours | 2 days
Date & heure: 19 Sep 2021 21:46:18 UTC -
Heure locale à l'épicentre: dimanche, 19 sept. 2021 16:46 (GMT -5)
Magnitude: 3.8
Profondeur: 63 km
Épicentre latitude / longitude: 16.17°N / 96.14°W (État de Oaxaca, Mexique)
Antipode sismique latitude / longitude: 16.17°S / 83.86°E
Source de données principale: SSN (Servicio Sismológico Nacional)
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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 12. This is compared to the average number of 11.99 quakes during preceding intervals of 3 jours with a standard deviation (σ) of 8.9, calculated by analzing all 100 preceding intervals of 3 jours for the same region.
Interpretation:
Note: At a magnitude of 3.8, 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 0.2 -0 (-0.2σ) 5+ 0 0.7 1 -0.7 (-0.7σ) 4+ 2 3.3 2.8 -1.3 (-0.5σ) 3+ 10 8 6.4 2.1 (0.3σ) Total 12 11.99 8.9 0 (0σ)
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+
Showing quakes magnitude 3.0 or higher (total: 12).
 Date et l'heure MagProfondeur Lieu Détail 20 Sep 2021 02:10:55 GMT(4 heures after quake) 3.3187 km Southern Sumatra, Indonesia [Show on map] Plus 20 Sep 2021 12:26:28 GMT(15 heures after quake) 4.514 km Southern Sumatra, Indonesia [Show on map] Plus 20 Sep 2021 15:10:35 GMT(17 heures after quake) 3.910 km Southwest of Sumatra, Indonesia [Show on map] Plus 21 Sep 2021 04:39:50 GMT(1 jour 7 heures after quake) 3.110 km Northern Sumatra, Indonesia [Show on map] Plus 21 Sep 2021 05:03:42 GMT(1 jour 7 heures after quake) 3.110 km Northern Sumatra, Indonesia [Show on map] Plus 21 Sep 2021 12:39:21 GMT(1 jour 15 heures after quake) 3.510 km Sunda Strait, Indonesia [Show on map] Plus 21 Sep 2021 12:58:36 GMT(1 jour 15 heures after quake) 3.510 km South of Java, Indonesia [Show on map] Plus 21 Sep 2021 12:58:46 GMT(1 jour 15 heures after quake) 3.220 km Java, Indonesia [Show on map] Plus 21 Sep 2021 18:05:13 GMT(1 jour 20 heures after quake) 3.610 km Southern Sumatra, Indonesia [Show on map] Plus 21 Sep 2021 19:50:00 GMT(1 jour 22 heures after quake) 3.410 km Southern Sumatra, Indonesia [Show on map] Plus 21 Sep 2021 23:32:23 GMT(2 jours after quake) 3.110 km Northern Sumatra, Indonesia [Show on map] Plus 22 Sep 2021 17:30:10 GMT(3 jours after quake) 4.510 km Indonesia: Off West Coast of Northern Sumatra [Show on map] Plus
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