User:Fkasemi/sandbox

The phenomenon of Chalkida:
One thing that characterizes Euboea and especially Chalkida is the phenomenon of "trela nera". (i.e. Crazy Waters). This phenomenon is a rare phenomenon that occurs in the Strait of Euripus under the bridge opening, where changes the direction of the flow of ocean waters. That is when the water flowing to one side and when the opposite side. This change happens every 6 hours approximately.This phenomenon reaches its climax under the old sliding bridge where the speed of the water takes the maximum value reaches 9 miles per hour. It is said that this speed of the water up to a shark will struggle to swim in the opposite direction to that have marine water. This phenomenon proceeds as follows: the waters moving in the one direction for 6 hours, then for 8 minutes waters are stable and then they are moving in the opposite direction for other 6 hours then other 8 minutes the water is stable. From this phenomenon, the city of Xalkida has gotten the nickname “Crazy waters”.

Explanations for this phenomenon:
The explanation of this phenomenon of Euripus has bothered the ancient Greeks, especially Aristotle and Eratosthenes and many other scientists of the last century, including the Greek Dimitrios Eginitis. . But the explanation has been given and has now become acceptable. Is that natural tidal wave reaching the Aegean Sea on Evoia east part of entering the North Evoia and another enters the South Evian. Due to the different length of the route, while natural tidal wave coming from the south reaches the channel of Euripus in 1 hour and 15 minutes earlier than coming from the north. From this, it is normal southerly entering water bodies where elevates the level of 30-40 cm and sea generated from N. to B. After 6 hours, as the successor to ebb tide, the conditions are reversed and created oncoming, in the Northern part of after accumulated larger bodies of water. When we happen nerves, so the intensity is high tide, the tide of Euripus presented normal. But in quartered, where the water is weaker, so the configuration of the seaside, the ocean floor, the current weather conditions and other barometric causes that water occurs irregularly.

2 global singularities
What is not widely known, however, is that this phenomenon exists in other parts of the world has 2 global singularities.

The first is the fact that the 24th hour of the third and last day of each period clutter (ie the 9 and 23 day Moon) the water always begin to flow from the North to the South Evian Gulf.

The second unique global phenomenon is that the equinox periods (ie March 21 and September 22) the currents change direction immediately without staying 8 minutes like made ​​all other days.