# Light mag. 3.3 earthquake - Santa Maria Huazolotitlan, 9.5 km southeast of Pinotepa Nacional, Oaxaca, Mexico, on Saturday, Aug 21, 2021 2:52 pm (GMT -5) - writeAge(1629575531)

Quakes around its antipode during the following 3 days
Check different time intervals: 24 hours | 2 days
Date & time: 21 Aug 2021 19:52:11 UTC -
Local time at epicenter: Saturday, Aug 21, 2021 2:52 pm (GMT -5)
Magnitude: 3.3
Depth: 1 km
Epicenter latitude / longitude: 16.28°N / 97.99°W (Santa Maria Huazolotitlan, Oaxaca, Mexico)
Antipode latitude / longitude: 16.28°S / 82.01°E
Primary data source: SSN (Servicio Sismológico Nacional)
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## Quakes within 30 degrees from seismic antipode up to 3 days 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 days around the antipode of the quake was 11. This is compared to the average number of 10.29 quakes during preceding intervals of 3 days with a standard deviation (σ) of 8.6, calculated by analzing all 100 preceding intervals of 3 days for the same region.
Interpretation:
Note: At a magnitude of 3.3, 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 days.
 Mag class Total # Average σ Observed deviation 6+ 0 0 0.2 -0 (-0.2σ) 5+ 0 0.6 0.9 -0.6 (-0.7σ) 4+ 6 2.8 2.7 3.2 (1.2σ) 3+ 5 6.8 6 -1.8 (-0.3σ) Total 11 10.29 8.6 0.7 (0.1σ)
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

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Showing quakes magnitude 3.0 or higher (total: 11).
 Date and time MagDepth Location Details 21 Aug 2021 22:33:59 GMT(2 hours and 42 minutes after quake) 4.510 km Indonesia: Off West Coast of Northern Sumatra [Show on map] More 22 Aug 2021 06:34:17 GMT(11 hours after quake) 3.510 km Indonesia: Off West Coast of Northern Sumatra [Show on map] More 22 Aug 2021 08:59:47 GMT(13 hours after quake) 4.322 km Northern Sumatra, Indonesia [Show on map] More 22 Aug 2021 12:16:50 GMT(16 hours after quake) 3.081 km Northern Sumatra, Indonesia [Show on map] More 22 Aug 2021 21:13:05 GMT(1 day 1 hours after quake) 4.810 km Java, Indonesia [Show on map] More 22 Aug 2021 23:07:04 GMT(1 day 3 hours after quake) 3.320 km Southern Sumatra, Indonesia [Show on map] More 23 Aug 2021 05:06:21 GMT(1 day 9 hours after quake) 4.410 km Southwest of Sumatra, Indonesia [Show on map] More 23 Aug 2021 20:59:54 GMT(2 days after quake) 4.753 km Northern Sumatra, Indonesia [Show on map] More 24 Aug 2021 03:50:00 GMT(2 days after quake) 3.781 km Northern Sumatra, Indonesia [Show on map] More 24 Aug 2021 05:00:23 GMT(2 days after quake) 3.714 km Southern Sumatra, Indonesia [Show on map] More 24 Aug 2021 17:18:42 GMT(3 days after quake) 4.939 km Indonesia: Off West Coast of Northern Sumatra [Show on map] More
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