# Événement inconnu (à l'origine signalé comme tremblement de terre): 5.6 km au nord de Tepeji del Rio de Ocampo, État dHidalgo, Mexique, samedi, 18 sept. 2021 12:27 (GMT -5) - writeAge(1631986020)

Quakes around its antipode during the following 3 jours
Check different time intervals: 24 hours | 2 days
Date & heure: 18 Sep 2021 17:27:00 UTC -
Heure locale à l'épicentre: samedi, 18 sept. 2021 12:27 (GMT -5)
Magnitude: 3?
Profondeur: ? km
Épicentre latitude / longitude: 19.9527°N / 99.3604°W (Tepeji del Rio de Ocampo, État dHidalgo, Mexique)
Antipode sismique latitude / longitude: 19.953°S / 80.64°E
Source de données principale: VolcanoDiscovery
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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 5. This is compared to the average number of 5.09 quakes during preceding intervals of 3 jours with a standard deviation (σ) of 4.8, calculated by analzing all 100 preceding intervals of 3 jours for the same region.
Interpretation:
Note: At a magnitude of 3.0, 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 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 0.5 0.8 -0.5 (-0.6σ) 4+ 2 1.7 1.9 0.3 (0.2σ) 3+ 3 2.8 2.8 0.2 (0.1σ) Total 5 5.09 4.8 -0.1 (-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

Showing quakes magnitude 3.0 or higher (total: 5).
 Date et l'heure MagProfondeur Lieu Détail 19 Sep 2021 01:41:51 GMT(8 heures after quake) 3.856 km Southern Sumatra, Indonesia [Show on map] Plus 19 Sep 2021 21:20:28 GMT(1 jour 4 heures after quake) 4.310 km Southwest of Sumatra, Indonesia [Show on map] Plus 20 Sep 2021 12:26:28 GMT(1 jour 19 heures after quake) 4.514 km Southern Sumatra, Indonesia [Show on map] Plus 20 Sep 2021 15:10:35 GMT(1 jour 22 heures after quake) 3.910 km Southwest of Sumatra, Indonesia [Show on map] Plus 21 Sep 2021 12:39:21 GMT(3 jours after quake) 3.510 km Sunda Strait, Indonesia [Show on map] Plus
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