Minor mag. 1.4 earthquake - 6km W of Cobb, CA, on Saturday, Sep 18, 2021 7:29 pm (GMT -7) - writeAge(1632018569)

Quakes around its antipode during the following 3 days
Check different time intervals: 24 hours | 2 days
Date & time: 19 Sep 2021 02:29:29 UTC -
Local time at epicenter: Saturday, Sep 18, 2021 7:29 pm (GMT -7)
Magnitude: 1.4
Depth: 1.4 km
Epicenter latitude / longitude: 38.8255°N / 122.7902°W (California, United States)
Antipode latitude / longitude: 38.826°S / 57.21°E
Primary data source: USGS (United States Geological Survey)
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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 1. This is compared to the average number of 0.43 quakes during preceding intervals of 3 days with a standard deviation (σ) of 0.8, calculated by analzing all 100 preceding intervals of 3 days for the same region.
Interpretation:
Note: At a magnitude of 1.4, 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 0.1 -0 (-0.1σ) 5+ 0 0.1 0.3 -0.1 (-0.3σ) 4+ 0 0.2 0.5 -0.2 (-0.4σ) 3+ 1 0.1 0.3 0.9 (2.6σ) Total 1 0.43 0.8 0.6 (0.7σ)
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: 1).
 Date and time MagDepth Location Details 21 Sep 2021 12:25:59 GMT(2 days after quake) 3.010 km South Africa Region [Show on map] More
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