# Séisme signalé ou événement semblable à un séisme: 3.4 km au nord-ouest de Orange, Californie, États-Unis, vendredi, le 28 mai 2021 04:15 - writeAge(1622175302)

Quakes around its antipode during the following 24 heures
Check different time intervals: 2 days | 3 days
Date & heure: 28 May 2021 04:15:02 UTC -
Magnitude: unknown
Profondeur: ? km
Épicentre latitude / longitude: 33.8107°N / 117.877°W (Comté d'Orange, Californie, États-Unis)
Antipode latitude / longitude: 33.811°S / 62.123°E
Source de données principale: VolcanoDiscovery
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## Quakes within 30 degrees from seismic antipode up to 24 heures 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 24 heures around the antipode of the quake was 2. This is compared to the average number of 0.32 quakes during preceding intervals of 24 heures with a standard deviation (σ) of 0.7, calculated by analzing all 100 preceding intervals of 24 heures 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 a weak increase in detected quakes around the antipode during the following 24 heures.
 Mag class Total # Average σ Observed deviation 6+ 0 0 0.1 -0 (-0.1σ) 5+ 0 0.1 0.3 -0.1 (-0.3σ) 4+ 0 0.1 0.3 -0.1 (-0.3σ) 3+ 2 0.1 0.5 1.9 (4.2σ) Total 2 0.32 0.7 1.7 (2.6σ)
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 28 May 2021 13:21:44 GMT(9 heures after quake) 3.436 km Mayotte: Near Mamoudzou [Show on map] Plus 28 May 2021 18:19:19 GMT(14 heures after quake) 3.335 km Mayotte: Near Mamoudzou [Show on map] Plus
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