The channel of Euripus is a narrow strip of sea 39 m wide, 40 m long and a about 8,5 m deep connecting the North with the South Evian bay , between Central Greece and Evia, in Chalkis. In this area, you receive the following unique complex phenomenon, which is due to the pull of the moon : The channel's water is moving continuously and the direction of its movement is changing, sometimes directed towards the North and sometimes to the South Evian bay. The systematic monitoring of the stream showed that during the period of 22-23 days it shows a regular change of direction every 6 hours, just like the tide and ebb, and during the remaining 6-7 days of the current month it is so irregular, that can changes direction even and 14 times within the same 24 hours ! It was found that the normal stream corresponds to conjugations, in 11 to 12 days around the new moon (NM) and as many in the full moon, while the irregular current occurs during squaring.
In the channel we can observe this very rare in the world and unique in Greece apparent motion of the water. The maximum speed of the water can reach 9 mph. The tide of Euripus is a complex phenomenon unique due to tidal forces, which is observed only in the Strait of Euripus in my city Chalcis. In this beach called "Fine sand" the phenomenon of the tides is more intense than anywhere else and it is a natural habitat for the seagulls in the area . . .
The interpretation of the phenomenon, which follows the laws of the tides had also occupied the ancient Greeks, especially Aristotle and Eratosthenes . . .