Reported seismic-like event (likely no quake): 30 km north of Catania, Sicily, Italy, Sep 22, 2021 1:45 am (GMT +2) -

Quakes around its antipode during the following 3 days
Check different time intervals: 24 hours | 2 days
Date & time: 21 Sep 2021 23:45:29 UTC -
Local time at epicenter: Wednesday, Sep 22, 2021 1:45 am (GMT +2)
Magnitude: 3?
Depth: ? km
Epicenter latitude / longitude: 37.75°N / 14.99°E (Catania, Sicily, Italy)
Antipode latitude / longitude: 37.75°S / 165.01°W
Primary data source: VolcanoDiscovery
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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 19. This is compared to the average number of 18.33 quakes during preceding intervals of 3 days with a standard deviation (σ) of 34.9, calculated by analzing all 100 preceding intervals of 3 days 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 days.
Mag classTotal #AverageσObserved deviation
6+00.31-0.3 (-0.3σ)
5+43.68.80.4 (0σ)
4+148.69.25.4 (0.6σ)
3+15.818.1-4.8 (-0.3σ)
Total1918.3334.90.7 (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

Filter by magnitude:
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3.0+
4.0+
5.0+
Showing quakes magnitude 3.0 or higher (total: 19).
Date and timeMag
Depth
LocationDetails
22 Sep 2021 08:36:39 GMT
(9 hours after quake)
5.0

12 km
New Zealand [Show on map]More
22 Sep 2021 14:01:09 GMT
(14 hours after quake)
4.4

515 km
Fiji: New Zealand [Show on map]More
22 Sep 2021 16:28:33 GMT
(17 hours after quake)
4.7

33 km
New Zealand [Show on map]More
22 Sep 2021 17:33:00 GMT
(18 hours after quake)
5.0

10 km
New Zealand [Show on map]More
22 Sep 2021 17:44:29 GMT
(18 hours after quake)
4.5

10 km
Kermadec Islands, New Zealand [Show on map]More
22 Sep 2021 19:57:25 GMT
(20 hours after quake)
4.8

368 km
New Zealand: Kermadec Islands Region [Show on map]More
22 Sep 2021 19:57:27 GMT
(20 hours after quake)
5.6

383 km
New Zealand [Show on map]More
23 Sep 2021 02:03:50 GMT
(1 day 2 hours after quake)
4.5

395 km
South of the Fiji Islands [Show on map]More
23 Sep 2021 08:36:12 GMT
(1 day 9 hours after quake)
4.8

549 km
South of Fiji Islands [Show on map]More
23 Sep 2021 08:36:27 GMT
(1 day 9 hours after quake)
4.8

586 km
New Zealand [Show on map]More
23 Sep 2021 12:39:17 GMT
(1 day 13 hours after quake)
3.0

33 km
New Zealand [Show on map]More
23 Sep 2021 23:32:02 GMT
(1 day 24 hours after quake)
4.8

145 km
New Zealand [Show on map]More
23 Sep 2021 23:37:23 GMT
(1 day 24 hours after quake)
4.7

10 km
Kermadec Islands, New Zealand [Show on map]More
24 Sep 2021 00:08:09 GMT
(2 days after quake)
4.9

10 km
122 Km E of ‘Ohonua, Tonga [Show on map]More
24 Sep 2021 02:31:27 GMT
(2 days after quake)
4.6

10 km
Kermadec Islands, New Zealand [Show on map]More
24 Sep 2021 07:57:38 GMT
(2 days after quake)
5.0

12 km
New Zealand [Show on map]More
24 Sep 2021 11:33:20 GMT
(2 days after quake)
4.1

547 km
South of the Fiji Islands [Show on map]More
24 Sep 2021 15:53:08 GMT
(3 days after quake)
4.3

345 km
New Zealand [Show on map]More
24 Sep 2021 19:05:59 GMT
(3 days after quake)
4.2

519 km
Fiji: 258 Km WNW of Haveluloto, Tonga [Show on map]More
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