# Séisme mineur mag. 1.7 - 45 km au nord-est de Tagbilaran, Bohol, Visayas centrales, Philippines, jeudi, 21 oct. 2021 01:48 (GMT +8) - writeAge(1634752080)

Quakes around its antipode during the following 3 jours
Check different time intervals: 24 hours | 2 days
Date & heure: 20 Oct 2021 17:48:00 UTC -
Heure locale à l'épicentre: jeudi, 21 oct. 2021 01:48 (GMT +8)
Magnitude: 1.7
Profondeur: 34 km
Épicentre latitude / longitude: 9.91°N / 124.17°E (Bohol, Visayas centrales, Philippines)
Antipode sismique latitude / longitude: 9.91°S / 55.83°W (Brésil)
Source de données principale: PHIVOLCS (Philippine Institute of Volcanology and Seismology)
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## Quakes within 30 degrees from seismic antipode up to 3 jours 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 jours around the antipode of the quake was 49. This is compared to the average number of 0.23 quakes during preceding intervals of 3 jours with a standard deviation (σ) of 5.4, calculated by analzing all 100 preceding intervals of 3 jours for the same region.
Interpretation:
Note: At a magnitude of 1.7, 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 jours.
 Mag class Total # Average σ Observed deviation 6+ 0 0 0 n/a 5+ 0 0 0 n/a 4+ 6 0 0.6 6 (9.4σ) 3+ 43 0.2 4.8 42.8 (8.9σ) Total 49 0.23 5.4 48.8 (9σ)
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

Filtrer par magnitude:
Tous
3.0+
4.0+
Showing quakes magnitude 3.0 or higher (total: 49).
 Date et l'heure MagProfondeur Lieu Détail 20 Oct 2021 17:59:50 GMT(12 minutes after quake) 3.1116 km ANTOFAGASTA, CHILE [Show on map] Plus 20 Oct 2021 20:02:03 GMT(2 heures et 14 minutes after quake) 3.1138 km SAN JUAN (Argentina) [Show on map] Plus 20 Oct 2021 20:16:46 GMT(2 heures et 29 minutes after quake) 3.337 km OFFSHORE COQUIMBO, CHILE [Show on map] Plus 20 Oct 2021 20:20:20 GMT(2 heures et 32 minutes after quake) 3.181 km ANTOFAGASTA, CHILE [Show on map] Plus 20 Oct 2021 22:21:00 GMT(5 heures after quake) 3.335 km Venezuela: 4 Km Al Suroeste De Guiria [Show on map] Plus 20 Oct 2021 22:21:05 GMT(5 heures after quake) 3.60 km French Guiana: Oiapoque/AP [Show on map] Plus 21 Oct 2021 00:03:57 GMT(6 heures after quake) 3.4174 km SAN JUAN (Argentina) [Show on map] Plus 21 Oct 2021 02:42:47 GMT(9 heures after quake) 3.1108 km TARAPACA, CHILE [Show on map] Plus 21 Oct 2021 03:29:00 GMT(10 heures after quake) 3.123 km Venezuela: 30 Km Al Norte De Barquisimeto [Show on map] Plus 21 Oct 2021 05:58:54 GMT(12 heures after quake) 3.336 km OFFSHORE VALPARAISO, CHILE [Show on map] Plus 21 Oct 2021 07:31:17 GMT(14 heures after quake) 3.1122 km ANTOFAGASTA, CHILE [Show on map] Plus 21 Oct 2021 10:01:50 GMT(16 heures after quake) 3.5102 km ANTOFAGASTA, CHILE [Show on map] Plus 21 Oct 2021 10:32:27 GMT(17 heures after quake) 3.2194 km SALTA (Argentina) [Show on map] Plus 21 Oct 2021 10:51:19 GMT(17 heures after quake) 3.333 km SALTA (Argentina) [Show on map] Plus 21 Oct 2021 10:57:27 GMT(17 heures after quake) 3.9221 km SALTA, ARGENTINA [Show on map] Plus 21 Oct 2021 14:17:55 GMT(20 heures after quake) 3.4120 km ANTOFAGASTA, CHILE [Show on map] Plus 21 Oct 2021 14:23:00 GMT(21 heures after quake) 3.01.3 km Venezuela: 31 Km Al Sureste De El Vigia [Show on map] Plus 21 Oct 2021 15:03:11 GMT(21 heures after quake) 3.10 km Brazil: Rifaina/SP [Show on map] Plus 21 Oct 2021 19:17:24 GMT(1 jour 1 heures after quake) 3.112 km SAN JUAN (Argentina) [Show on map] Plus 21 Oct 2021 19:40:36 GMT(1 jour 2 heures after quake) 3.36 km SAN JUAN (Argentina) [Show on map] Plus 21 Oct 2021 19:43:24 GMT(1 jour 2 heures after quake) 3.3201 km SALTA (Argentina) [Show on map] Plus 21 Oct 2021 20:43:26 GMT(1 jour 3 heures after quake) 3.6259 km POTOSI, BOLIVIA [Show on map] Plus 21 Oct 2021 23:55:54 GMT(1 jour 6 heures after quake) 3.799 km COQUIMBO, CHILE [Show on map] Plus 22 Oct 2021 01:24:42 GMT(1 jour 8 heures after quake) 3.2115 km ANTOFAGASTA, CHILE [Show on map] Plus 22 Oct 2021 07:46:43 GMT(1 jour 14 heures after quake) 3.0109 km TARAPACA, CHILE [Show on map] Plus 22 Oct 2021 09:29:13 GMT(1 jour 16 heures after quake) 3.3117 km SAN JUAN (Argentina) [Show on map] Plus 22 Oct 2021 09:30:41 GMT(1 jour 16 heures after quake) 3.839 km OFFSHORE TARAPACA, CHILE [Show on map] Plus 22 Oct 2021 09:57:05 GMT(1 jour 16 heures after quake) 3.197 km SAN JUAN (Argentina) [Show on map] Plus 22 Oct 2021 11:06:24 GMT(1 jour 17 heures after quake) 4.222 km Central Bolivia [Show on map] Plus 22 Oct 2021 11:14:49 GMT(1 jour 17 heures after quake) 4.4109 km ANTOFAGASTA, CHILE [Show on map] Plus 22 Oct 2021 16:31:50 GMT(1 jour 23 heures after quake) 3.1123 km MENDOZA (Argentina) [Show on map] Plus 22 Oct 2021 18:06:25 GMT(2 jours after quake) 4.2134 km CENTRAL PERU [Show on map] Plus 22 Oct 2021 19:39:53 GMT(2 jours after quake) 3.4192 km POTOSI, BOLIVIA [Show on map] Plus 22 Oct 2021 20:13:30 GMT(2 jours after quake) 3.2115 km SAN JUAN (Argentina) [Show on map] Plus 22 Oct 2021 22:11:06 GMT(2 jours after quake) 3.4109 km SAN JUAN (Argentina) [Show on map] Plus 22 Oct 2021 22:40:43 GMT(2 jours after quake) 3.1155 km SALTA (Argentina) [Show on map] Plus 22 Oct 2021 23:26:24 GMT(2 jours after quake) 3.333 km COQUIMBO, CHILE [Show on map] Plus 23 Oct 2021 02:08:56 GMT(2 jours after quake) 3.3201 km ANTOFAGASTA, CHILE [Show on map] Plus 23 Oct 2021 03:09:21 GMT(2 jours after quake) 3.110 km SAN JUAN, ARGENTINA [Show on map] Plus 23 Oct 2021 03:34:30 GMT(2 jours after quake) 3.50 km Central Bolivia [Show on map] Plus 23 Oct 2021 04:14:13 GMT(2 jours after quake) 3.912 km SOUTHERN PERU [Show on map] Plus 23 Oct 2021 04:20:41 GMT(2 jours after quake) 4.011 km SOUTHERN PERU [Show on map] Plus 23 Oct 2021 08:21:43 GMT(3 jours after quake) 4.7154 km Chile-Argentina Border Region [Show on map] Plus 23 Oct 2021 11:28:57 GMT(3 jours after quake) 3.040 km OFFSHORE VALPARAISO, CHILE [Show on map] Plus 23 Oct 2021 12:36:43 GMT(3 jours after quake) 3.131 km ATACAMA, CHILE [Show on map] Plus 23 Oct 2021 14:00:52 GMT(3 jours after quake) 3.010 km SAN JUAN (Argentina) [Show on map] Plus 23 Oct 2021 14:02:20 GMT(3 jours after quake) 3.2230 km JUJUY (Argentina) [Show on map] Plus 23 Oct 2021 15:25:04 GMT(3 jours after quake) 3.495 km SAN LUIS (Argentina) [Show on map] Plus 23 Oct 2021 16:34:53 GMT(3 jours after quake) 4.027 km NEAR COAST OF SOUTHERN PERU [Show on map] Plus
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