Pythia’s tidal patterns have been documented and recorded for eons and yet little is understood about how they function. They appear to have no cyclical patterns and seem as if they are not tied to any natural phenomena. High and low tidal periods last for years at a time but the transition from one to another is a disruptive and intense experience that occurs over the time period of about a month. These transitions are known as Tidal Surges and cause drastic changes in the landscape. On average Tidal Surges will cause a sea level change of approximately 10 feet but I have found records that indicate there was a Surge some 1000 years ago that caused a change of 100 feet!