Very strong mag. 6.3 earthquake - Ionian Sea, 8.6 km northeast of Poros, Greece, on Sunday, 9 August 1953 at 07:41 (GMT)

Very strong magnitude 6.3 earthquake at 15 km depth

Date & time: 9 Aug 1953 07:41:10 UTC
Magnitude: 6.3
Depth: 15.0 km
Epicenter latitude / longitude: 38.216°N / 20.83°E

(Ionian Sea, Greece)
Nearest volcano: Volos-Atalanti (194 km / 121 mi)
Nearby towns and cities:
9 km (5 mi) NE of Poros (pop: 1,060) --> See nearby quakes!
19 km (12 mi) SSE of Ithaki (pop: 1,840) --> See nearby quakes!
30 km (19 mi) E of Argostoli (pop: 9,820) --> See nearby quakes!
49 km (30 mi) N of Zakynthos (pop: 11,500) --> See nearby quakes!
65 km (40 mi) NW of Amaliada (pop: 16,800) --> See nearby quakes!
68 km (42 mi) SW of Agrinio (pop: 46,900) --> See nearby quakes!
79 km (49 mi) W of Patras (pop: 168,000) --> See nearby quakes!
81 km (50 mi) NW of Pýrgos (Pirgos) (pop: 22,400) --> See nearby quakes!
83 km (51 mi) S of Preveza (Préveza) (pop: 17,300) --> See nearby quakes!
255 km (158 mi) W of Athens (pop: 664,000) --> See nearby quakes!
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 1.8 x 10¹⁴ joules (49.4 gigawatt hours, equivalent to 42502 tons of TNT or 2.7 atomic bombs!) More info

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Data for the same earthquake reported by different agencies

Info: The more agencies report about the same quake and post similar data, the more confidence you can have in the data. It takes normally up to a few hours until earthquake parameters are calculated with near-optimum precision.

Mag.	Depth	Location	Source
6.3	15 km	Greece	USGS

Note: for quakes of 2012 and earlier, our database often contains only records from USGS.

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Aftershocks

More info

Recorded aftershocks, latest first (19 quakes):

28 Dec 1953 02:38 UTC
| M 5.6 |
15 km (9.3 mi) depth
|
29 km (18 mi) distance
| USGS | Details
30 Nov 1953 13:20 UTC
| M 5.6 |
15 km (9.3 mi) depth
|
49 km (30 mi) distance
| USGS | Details
21 Oct 1953 18:39 UTC
| M 6.2 |
15 km (9.3 mi) depth
|
23 km (15 mi) distance
| USGS | Very strong mag. 6.2 earthquake - Ionian Sea, 3 km southwest of Vlachata, Greece, on Wednesday, 21 October 1953 at 18:39 (GMT)
21 Oct 1953 11:31 UTC
| M 5.6 |
15 km (9.3 mi) depth
|
11 km (7 mi) distance
| USGS | Details
16 Oct 1953 21:44 UTC
| M 5.4 |
15 km (9.3 mi) depth
|
27 km (17 mi) distance
| USGS | Details
10 Oct 1953 21:29 UTC
| M 5.6 |
15 km (9.3 mi) depth
|
15 km (9 mi) distance
| USGS | Details
14 Sep 1953 14:56 UTC
| M 5.7 |
15 km (9.3 mi) depth
|
1 km (1 mi) distance
| USGS | Details
17 Aug 1953 02:12 UTC
| M 5.3 |
15 km (9.3 mi) depth
|
45 km (28 mi) distance
| USGS | Details
13 Aug 1953 03:22 UTC
| M 5.4 |
15 km (9.3 mi) depth
|
5 km (3 mi) distance
| USGS | Details
12 Aug 1953 16:08 UTC
| M 5.5 |
15 km (9.3 mi) depth
|
21 km (13 mi) distance
| USGS | Details
12 Aug 1953 14:08 UTC
| M 6.0 |
15 km (9.3 mi) depth
|
12 km (8 mi) distance
| USGS | Very strong mag. 6.0 earthquake - Ionian Sea, 13 km east of Poros, Greece, on Wednesday, 12 August 1953 at 14:08 (GMT)
12 Aug 1953 13:39 UTC
| M 5.7 |
15 km (9.3 mi) depth
|
22 km (14 mi) distance
| USGS | Details
12 Aug 1953 12:05 UTC
| M 6.2 |
15 km (9.3 mi) depth
|
35 km (22 mi) distance
| USGS | Very strong mag. 6.2 earthquake - Ionian Sea, 15 km northwest of Zakynthos, Greece, on Wednesday, 12 August 1953 at 12:05 (GMT)
12 Aug 1953 11:33 UTC
| M 5.6 |
15 km (9.3 mi) depth
|
23 km (14 mi) distance
| USGS | Details
12 Aug 1953 09:23 UTC
| M 6.8 |
10 km (6.2 mi) depth
|
10 km (7 mi) distance
| USGS | Major magnitude 6.8 earthquake - Ionian Sea, 15 km east of Poros, Greece, on Wednesday, 12 August 1953 at 09:23 (GMT)
12 Aug 1953 06:08 UTC
| M 5.5 |
15 km (9.3 mi) depth
|
42 km (26 mi) distance
| USGS | Details
11 Aug 1953 13:11 UTC
| M 5.4 |
15 km (9.3 mi) depth
|
11 km (7 mi) distance
| USGS | Details
11 Aug 1953 12:43 UTC
| M 5.4 |
15 km (9.3 mi) depth
|
44 km (27 mi) distance
| USGS | Details
11 Aug 1953 03:32 UTC
| M 6.5 |
10 km (6.2 mi) depth
|
10 km (6 mi) distance
| USGS | Major magnitude 6.5 earthquake - Ionian Sea, 18 km east of Samos, Greece, on Tuesday, 11 August 1953 at 03:32 (GMT)

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