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Major magnitude 6.7 earthquake - Vrachonisida Agios Ioannis, 7.3 km west of Anafonitria, Greece, on Sunday, November 15, 1959 at 17:08 GMT

Major magnitude 6.7 earthquake at 15 km depth

Earthquake details

Date & time	Nov 15, 1959 17:08:47 UTC
Local time at epicenter
Status	Confirmed
Magnitude	6.7
Depth	15.0 km
Epicenter latitude / longitude	37.844°N / 20.568°E (Ionian Sea, Greece)
Antipode	37.844°S / 159.432°W
Shaking intensity	Very strong shaking near epicenter
Felt	0 reports
Primary data source	USGS (United States Geological Survey)
Nearest volcano	Sousaki (222 km / 138 mi)
Nearby towns and cities	17 km (10 mi) W of Katastari (pop: 1,380) \| Show on map \| Quakes nearby 30 km (18 mi) WNW of Zakynthos (pop: 11,500) \| Show on map \| Quakes nearby 38 km (24 mi) S of Argostoli (pop: 9,820) \| Show on map \| Quakes nearby 60 km (37 mi) W of Gastouni (pop: 8,110) \| Show on map \| Quakes nearby 69 km (43 mi) W of Amaliada (pop: 16,800) \| Show on map \| Quakes nearby 79 km (49 mi) WNW of Pyrgos (Pirgos) (pop: 22,400) \| Show on map \| Quakes nearby 96 km (59 mi) SW of Missolonghi (Μεσολόγγι) (pop: 12,800) \| Show on map \| Quakes nearby 111 km (69 mi) WSW of Patras (pop: 168,000) \| Show on map \| Quakes nearby 113 km (70 mi) SW of Agrinio (pop: 46,900) \| Show on map \| Quakes nearby 278 km (173 mi) W of Athens (pop: 664,000) \| Show on map \| Quakes nearby
Weather at epicenter at time of quake
Estimated seismic energy released	7.1 x 10¹⁴ joules (197 gigawatt hours, equivalent to 1.7 x 10⁵ tons of TNT or 10.6 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.	Depth	Location	Source
6.7	15 km	Ionian Sea (Greece)	USGS

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

Most recent quakes Top 20 past 24 hrs Quakes in Greece

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.

Aftershocks

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Recorded aftershocks, latest first (4 quakes)

Date and time	Mag Depth	Location	Details
Feb 23, 1960 07:34 63 years ago	5.6 25 km	Nisida Vagia, 10.2 km W of Lefkada, Ionian Islands, Greece	More
Dec 1, 1959 12:38 63 years ago	5.6 15 km	49 km SW of Argostoli, Kefallonia Regional Unit, Ionian Islands, Greece	More
Nov 27, 1959 00:26 63 years ago	5.4 15 km	42 km SW of Argostoli, Kefallonia Regional Unit, Ionian Islands, Greece	More
Nov 27, 1959 00:22 63 years ago	5.4 15 km	54 km SW of Argostoli, Kefallonia Regional Unit, Ionian Islands, Greece	More

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