Weak mag. 2.2 earthquake - Philippine Sea, 79 km northeast of Tandag, Philippines, on Wednesday, Oct 20, 2021 9:23 pm (GMT +8) -

Quakes around its antipode during the following 3 days
Check different time intervals: 24 hours | 2 days
Date & time: 20 Oct 2021 13:23:00 UTC -
Local time at epicenter: Wednesday, Oct 20, 2021 9:23 pm (GMT +8)
Magnitude: 2.2
Depth: 1 km
Epicenter latitude / longitude: 9.49°N / 126.79°E (Philippine Sea, Philippines)
Antipode latitude / longitude: 9.49°S / 53.21°W (Brazil)
Primary data source: PHIVOLCS (Philippine Institute of Volcanology and Seismology)
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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 41. This is compared to the average number of 0.25 quakes during preceding intervals of 3 days with a standard deviation (σ) of 4.8, calculated by analzing all 100 preceding intervals of 3 days for the same region.
Interpretation:
Note: At a magnitude of 2.2, 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 days.
Mag classTotal #AverageσObserved deviation
6+000n/a
5+000n/a
4+500.55 (9.2σ)
3+360.24.335.8 (8.4σ)
Total410.254.840.8 (8.5σ)
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:
all
3.0+
4.0+
Showing quakes magnitude 3.0 or higher (total: 41).
Date and timeMag
Depth
LocationDetails
20 Oct 2021 14:12:46 GMT
(50 minutes after quake)
3.2

181 km
SALTA (Argentina) [Show on map]More
20 Oct 2021 17:06:23 GMT
(4 hours after quake)
3.1

106 km
SAN JUAN (Argentina) [Show on map]More
20 Oct 2021 17:59:50 GMT
(5 hours after quake)
3.1

116 km
ANTOFAGASTA, CHILE [Show on map]More
20 Oct 2021 20:16:46 GMT
(7 hours after quake)
3.3

37 km
OFFSHORE COQUIMBO, CHILE [Show on map]More
20 Oct 2021 20:20:20 GMT
(7 hours after quake)
3.1

81 km
ANTOFAGASTA, CHILE [Show on map]More
20 Oct 2021 22:21:00 GMT
(9 hours after quake)
3.3

35 km
Venezuela: 4 Km Al Suroeste De Guiria [Show on map]More
20 Oct 2021 22:21:05 GMT
(9 hours after quake)
3.6

0 km
French Guiana: Oiapoque/AP [Show on map]More
21 Oct 2021 00:03:57 GMT
(11 hours after quake)
3.4

174 km
SAN JUAN (Argentina) [Show on map]More
21 Oct 2021 02:42:47 GMT
(13 hours after quake)
3.1

108 km
TARAPACA, CHILE [Show on map]More
21 Oct 2021 03:29:00 GMT
(14 hours after quake)
3.1

23 km
Venezuela: 30 Km Al Norte De Barquisimeto [Show on map]More
21 Oct 2021 07:31:17 GMT
(18 hours after quake)
3.1

122 km
ANTOFAGASTA, CHILE [Show on map]More
21 Oct 2021 10:01:50 GMT
(21 hours after quake)
3.5

102 km
ANTOFAGASTA, CHILE [Show on map]More
21 Oct 2021 10:32:27 GMT
(21 hours after quake)
3.2

194 km
SALTA (Argentina) [Show on map]More
21 Oct 2021 10:51:19 GMT
(21 hours after quake)
3.3

33 km
SALTA (Argentina) [Show on map]More
21 Oct 2021 10:57:27 GMT
(22 hours after quake)
3.9

221 km
SALTA, ARGENTINA [Show on map]More
21 Oct 2021 14:17:55 GMT
(1 day 1 hours after quake)
3.4

120 km
ANTOFAGASTA, CHILE [Show on map]More
21 Oct 2021 14:23:00 GMT
(1 day 1 hours after quake)
3.0

1.3 km
Venezuela: 31 Km Al Sureste De El Vigia [Show on map]More
21 Oct 2021 15:03:11 GMT
(1 day 2 hours after quake)
3.1

0 km
Brazil: Rifaina/SP [Show on map]More
21 Oct 2021 19:17:24 GMT
(1 day 6 hours after quake)
3.1

12 km
SAN JUAN (Argentina) [Show on map]More
21 Oct 2021 19:40:36 GMT
(1 day 6 hours after quake)
3.3

6 km
SAN JUAN (Argentina) [Show on map]More
21 Oct 2021 19:43:24 GMT
(1 day 6 hours after quake)
3.3

201 km
SALTA (Argentina) [Show on map]More
21 Oct 2021 20:43:26 GMT
(1 day 7 hours after quake)
3.6

259 km
POTOSI, BOLIVIA [Show on map]More
22 Oct 2021 01:24:42 GMT
(1 day 12 hours after quake)
3.2

115 km
ANTOFAGASTA, CHILE [Show on map]More
22 Oct 2021 07:46:43 GMT
(1 day 18 hours after quake)
3.0

109 km
TARAPACA, CHILE [Show on map]More
22 Oct 2021 09:29:13 GMT
(1 day 20 hours after quake)
3.3

117 km
SAN JUAN (Argentina) [Show on map]More
22 Oct 2021 09:30:41 GMT
(1 day 20 hours after quake)
3.8

39 km
OFFSHORE TARAPACA, CHILE [Show on map]More
22 Oct 2021 09:57:05 GMT
(1 day 21 hours after quake)
3.1

97 km
SAN JUAN (Argentina) [Show on map]More
22 Oct 2021 11:06:24 GMT
(1 day 22 hours after quake)
4.2

22 km
Central Bolivia [Show on map]More
22 Oct 2021 11:14:49 GMT
(1 day 22 hours after quake)
4.4

109 km
ANTOFAGASTA, CHILE [Show on map]More
22 Oct 2021 18:06:25 GMT
(2 days after quake)
4.2

134 km
CENTRAL PERU [Show on map]More
22 Oct 2021 19:39:53 GMT
(2 days after quake)
3.4

192 km
POTOSI, BOLIVIA [Show on map]More
22 Oct 2021 20:13:30 GMT
(2 days after quake)
3.2

115 km
SAN JUAN (Argentina) [Show on map]More
22 Oct 2021 22:11:06 GMT
(2 days after quake)
3.4

109 km
SAN JUAN (Argentina) [Show on map]More
22 Oct 2021 22:40:43 GMT
(2 days after quake)
3.1

155 km
SALTA (Argentina) [Show on map]More
23 Oct 2021 02:08:56 GMT
(3 days after quake)
3.3

201 km
ANTOFAGASTA, CHILE [Show on map]More
23 Oct 2021 03:09:21 GMT
(3 days after quake)
3.1

10 km
SAN JUAN, ARGENTINA [Show on map]More
23 Oct 2021 03:34:30 GMT
(3 days after quake)
3.5

0 km
Central Bolivia [Show on map]More
23 Oct 2021 04:14:13 GMT
(3 days after quake)
3.9

12 km
SOUTHERN PERU [Show on map]More
23 Oct 2021 04:20:41 GMT
(3 days after quake)
4.0

11 km
SOUTHERN PERU [Show on map]More
23 Oct 2021 08:21:43 GMT
(3 days after quake)
4.7

154 km
Chile-Argentina Border Region [Show on map]More
23 Oct 2021 12:36:43 GMT
(3 days after quake)
3.1

31 km
ATACAMA, CHILE [Show on map]More
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