# Séisme très faible mag. 3.1 - East China Sea, 65 km au nord-est de Naze, Amami Shi, Kagoshima, Japon, mardi, 26 oct. 2021 21:12 (GMT +9) - writeAge(1635250334)

Quakes around its antipode during the following 3 jours
Check different time intervals: 24 hours | 2 days
Date & heure: 26 Oct 2021 12:12:14 UTC -
Heure locale à l'épicentre: mardi, 26 oct. 2021 21:12 (GMT +9)
Magnitude: 3.1
Profondeur: 25 km
Épicentre latitude / longitude: 28.795°N / 129.931°E (East China Sea, Japon)
Antipode latitude / longitude: 28.795°S / 50.069°W (Brésil)
Source de données principale: NIED (National Research Institute for Earth Science and Disaster Resilience)
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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 2. This is compared to the average number of 0 quakes during preceding intervals of 3 jours with a standard deviation (σ) of 0.2, calculated by analzing all 100 preceding intervals of 3 jours for the same region.
Interpretation:
Note: At a magnitude of 3.1, 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 a weak increase in detected quakes around the antipode during the following 3 jours.
 Mag class Total # Average σ Observed deviation 6+ 0 0 0 n/a 5+ 0 0 0 n/a 4+ 1 0 0.1 1 (9.9σ) 3+ 1 0 0.1 1 (9.9σ) Total 2 0 0.2 2 (9.9σ)
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: 2).
 Date et l'heure MagProfondeur Lieu Détail 29 Oct 2021 09:19:30 GMT(3 jours after quake) 4.3127 km SOUTHERN PERU [Show on map] Plus 29 Oct 2021 10:59:43 GMT(3 jours after quake) 3.132 km OFF COAST OF VALPARAISO, CHILE [Show on map] Plus
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