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Very strong mag. 6.3 earthquake - 23 km south of Keri, Zakynthos, Ionian Islands, Greece, on Wednesday, August 27, 1958 at 15:16 GMT

Very strong magnitude 6.3 earthquake at 15 km depth

Earthquake details

Date & time	Aug 27, 1958 15:16:36 UTC
Local time at epicenter
Status	Confirmed
Magnitude	6.3
Depth	15.0 km
Epicenter latitude / longitude	37.473°N / 20.716°E (Ionian Sea, Greece)
Antipode	37.473°S / 159.284°W
Shaking intensity	Strong shaking near epicenter
Felt	0 reports
Primary data source	USGS (United States Geological Survey)
Nearest volcano	Sousaki (215 km / 134 mi)
Nearby towns and cities	29 km (18 mi) SSW of Lithakia (Zákynthos) (pop: 1,310) \| Show on map \| Quakes nearby 38 km (23 mi) SSW of Zakynthos (pop: 11,500) \| Show on map \| Quakes nearby 40 km (25 mi) S of Katastari (pop: 1,380) \| Show on map \| Quakes nearby 63 km (39 mi) SW of Gastouni (pop: 8,110) \| Show on map \| Quakes nearby 67 km (41 mi) WSW of Amaliada (pop: 16,800) \| Show on map \| Quakes nearby 68 km (42 mi) WSW of Pyrgos (Pirgos) (pop: 22,400) \| Show on map \| Quakes nearby 81 km (50 mi) SSE of Argostoli (pop: 9,820) \| Show on map \| Quakes nearby 124 km (77 mi) SW of Patras (pop: 168,000) \| Show on map \| Quakes nearby 133 km (82 mi) WNW of Kalamata (pop: 54,100) \| Show on map \| Quakes nearby 271 km (168 mi) WSW of Athens (pop: 664,000) \| Show on map \| Quakes nearby
Weather at epicenter at time of quake
Estimated seismic energy released	1.8 x 10¹⁴ joules (49.4 gigawatt hours, equivalent to 42502 tons of TNT or 2.7 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
6.3	15 km	Ionian Sea (Greece)	USGS

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

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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

[More info]

Recorded aftershocks, latest first (3 quakes)

Date and time	Mag Depth	Location	Details
Feb 7, 1959 20:08 64 years ago	5.1 15 km	40 km S of Zakynthos, Ionian Islands, Greece	More
Sep 2, 1958 01:13 64 years ago	5.6 20 km	66 km SW of Zakynthos, Ionian Islands, Greece	More
Aug 30, 1958 07:35 64 years ago	5.3 15 km	73 km SW of Zakynthos, Ionian Islands, Greece	More

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