A new river emerged overnight near the town of Chaján late November of last year.
According to the story, mysterious rumblings like the noise of a jet engine were heard and felt during a few days before the river formed.
The new mysterious river begins at the Cerro La Paraguaya, northwest of Chaján, travels 12 kilometers to the National Route 8 and 12 before reaching the Chaján river.
At some places, the river has created a five to six meters high and 10-15 meters wide canyon. The river itself has a depth of one meter and is by two meters wide.
Nobody in the region had ever experienced such a phenomenon. Normally, after heavy rains, the water used to run in small surface channels but had never created a new river.
The water balance of the region has been destroyed by the intensification of the agriculture. This new river phenomenon will probably increase exponentially in the future.
In the 2000s another new 40-kilometer-long river called ‘Rio Nuevo’ also emerged out of nowhere near San Luis. If you understand Spanish you will also like this video:
The new river most probably emerged after two days of heavy rain (> 100mm) in November 2015.