Strong mag. 5.5 earthquake - Aitoloakarnania, 43 km north of Patras, Achaea, Grece-Occidentale, Greece, on Wednesday, December 31, 1975 at 09:45 (GMT)

Strong mag. 5.5 earthquake - Aitoloakarnania, 43 km north of Patras, Achaea, Grece-Occidentale, Greece, on Wednesday, December 31, 1975 at 09:45 (GMT)

Strong magnitude 5.5 earthquake at 19 km depth

1 Jan 00:00 UTC: First to report: USGS after 30 seconds.
Date & time: Dec 31, 1975 09:45:47 UTC
Magnitude: 5.5
Depth: 19.0 km
Epicenter latitude / longitude: 38.628°N / 21.798°E (Aitoloakarnania, Grece-Occidentale, Greece)
Antipode: 38.628°S / 158.202°W
Nearest volcano: Volos-Atalanti (98 km / 61 mi)
Nearby towns and cities:
26 km (16 mi) N of Nafpaktos (West Greece) (pop: 13,400) --> See nearby quakes!
34 km (21 mi) E of Agrinio (West Greece) (pop: 46,900) --> See nearby quakes!
43 km (27 mi) NE of Missolonghi (Μεσολόγγι, West Greece) (pop: 12,800) --> See nearby quakes!
43 km (27 mi) N of Patras (West Greece) (pop: 168,000) --> See nearby quakes!
49 km (30 mi) NNW of Aigio (West Greece) (pop: 20,400) --> See nearby quakes!
83 km (51 mi) S of Karditsa (Thessaly) (pop: 32,800) --> See nearby quakes!
92 km (57 mi) SE of Arta (Epirus) (pop: 21,900) --> See nearby quakes!
96 km (60 mi) WNW of Livadia (Levádhia, Central Greece) (pop: 21,500) --> See nearby quakes!
98 km (61 mi) ESE of Preveza (Préveza, Epirus) (pop: 17,300) --> See nearby quakes!
183 km (114 mi) WNW of Athens (Attica) (pop: 664,000) --> See nearby quakes!
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 1.1 x 1013 joules (3.12 gigawatt hours, equivalent to 2682 tons of TNT or 0.2 atomic bombs!) | about seismic energy
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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.DepthLocationSource
5.519 kmGreeceUSGS
Note: for quakes of 2012 and earlier, our database often contains only records from USGS.

User reports for this quake

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
There are no user reports for this quake.
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Aftershocks

[More info]

Recorded aftershocks, latest first (33 quakes)

Date and timeMag
Depth
LocationDetails
Feb 7, 1976 18:07
46 years ago
3.1

33 km
Nisida Molocha, 16 km NW of Patras, Achaea, Grece-Occidentale, GreeceMore
Jan 29, 1976 00:46
46 years ago
3.1

33 km
Nisida Panagia, 33 km NW of Patras, Achaea, Grece-Occidentale, GreeceMore
Jan 20, 1976 12:44
46 years ago
3.8

43 km
Phocis, 45 km SW of Lamia, Phthiotis, Central GreeceMore
Jan 20, 1976 01:25
46 years ago
3.4

46 km
Aitoloakarnania, 37 km N of Patras, Achaea, Grece-Occidentale, GreeceMore
Jan 14, 1976 10:31
46 years ago
4.6

42 km
Phocis, Central Greece, 42 km NE of Patras, Achaea, Grece-Occidentale, GreeceMore
Jan 6, 1976 20:11
46 years ago
3.6

33 km
Aitoloakarnania, 24 km N of Patras, Achaea, Grece-Occidentale, GreeceMore
Jan 3, 1976 16:59
46 years ago
3.6

57 km
Phocis, Central Greece, 48 km NE of Patras, Achaea, Grece-Occidentale, GreeceMore
Jan 3, 1976 15:44
46 years ago
4.2

52 km
Aitoloakarnania, 38 km NE of Patras, Achaea, Grece-Occidentale, GreeceMore
Jan 3, 1976 15:03
46 years ago
4.6

34 km
Aitoloakarnania, 29 km N of Patras, Achaea, Grece-Occidentale, GreeceMore
Jan 3, 1976 14:45
46 years ago
4.0

33 km
Ionian Sea, 14 km N of Patras, Achaea, Grece-Occidentale, GreeceMore
Jan 3, 1976 13:50
46 years ago
3.6

33 km
Ionian Sea, 16 km NE of Patras, Achaea, Grece-Occidentale, GreeceMore
Jan 3, 1976 13:16
46 years ago
4.6

14 km
Aitoloakarnania, 17 km N of Patras, Achaea, Grece-Occidentale, GreeceMore
Jan 3, 1976 05:54
46 years ago
4.3

27 km
Aitoloakarnania, 27 km N of Patras, Achaea, Grece-Occidentale, GreeceMore
Jan 2, 1976 22:44
46 years ago
4.6

39 km
Aitoloakarnania, 36 km N of Patras, Achaea, Grece-Occidentale, GreeceMore
Jan 1, 1976 13:34
46 years ago
3.2

53 km
Phocis, 48 km SW of Lamia, Phthiotis, Central GreeceMore
Jan 1, 1976 00:04
46 years ago
4.7

19 km
Aitoloakarnania, 24 km NW of Patras, Achaea, Grece-Occidentale, GreeceMore
Dec 31, 1975 20:36
46 years ago
2.9

33 km
Aitoloakarnania, 27 km N of Patras, Achaea, Grece-Occidentale, GreeceMore
Dec 31, 1975 18:19
46 years ago
2.8

133 km
Aitoloakarnania, 14 km N of Patras, Achaea, Grece-Occidentale, GreeceMore
Dec 31, 1975 17:36
46 years ago
3.8

39 km
Aitoloakarnania, 37 km N of Patras, Achaea, Grece-Occidentale, GreeceMore
Dec 31, 1975 17:33
46 years ago
3.1

33 km
Aitoloakarnania, 29 km N of Patras, Achaea, Grece-Occidentale, GreeceMore
Dec 31, 1975 17:07
46 years ago
3.9

45 km
Aitoloakarnania, 29 km N of Patras, Achaea, Grece-Occidentale, GreeceMore
Dec 31, 1975 17:03
46 years ago
3.0

40 km
Aitoloakarnania, 22 km N of Patras, Achaea, Grece-Occidentale, GreeceMore
Dec 31, 1975 15:56
46 years ago
3.0

33 km
Nisida Molocha, 24 km NW of Patras, Achaea, Grece-Occidentale, GreeceMore
Dec 31, 1975 15:25
46 years ago
3.5

47 km
Nisida Molocha, 27 km NW of Patras, Achaea, Grece-Occidentale, GreeceMore
Dec 31, 1975 15:19
46 years ago
3.7

16 km
Aitoloakarnania, 24 km N of Patras, Achaea, Grece-Occidentale, GreeceMore
Dec 31, 1975 15:14
46 years ago
4.1

33 km
Phocis, Central Greece, 40 km NE of Patras, Achaea, Grece-Occidentale, GreeceMore
Dec 31, 1975 14:53
46 years ago
4.5

39 km
Nisida Molocha, 22 km NW of Patras, Achaea, Grece-Occidentale, GreeceMore
Dec 31, 1975 13:57
46 years ago
3.6

43 km
Aitoloakarnania, 32 km NW of Patras, Achaea, Grece-Occidentale, GreeceMore
Dec 31, 1975 13:51
46 years ago
4.7

24 km
Aitoloakarnania, 32 km N of Patras, Achaea, Grece-Occidentale, GreeceMore
Dec 31, 1975 13:02
46 years ago
4.0

25 km
Aitoloakarnania, 30 km NW of Patras, Achaea, Grece-Occidentale, GreeceMore
Dec 31, 1975 12:07
46 years ago
2.9

33 km
Nisida Molocha, 15 km N of Patras, Achaea, Grece-Occidentale, GreeceMore
Dec 31, 1975 11:31
46 years ago
4.0

42 km
Aitoloakarnania, 27 km N of Patras, Achaea, Grece-Occidentale, GreeceMore
Dec 31, 1975 10:53
46 years ago
2.8

33 km
46 km W of Lamia, Phthiotis, Central GreeceMore

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