[1] On 20 October 2014, the Servicio Geológico Colombiano (SGC) reported that a M 5.8 earthquake, the largest to date, occurred in the vicinity of the Cerro Negro de Mayasquer and Chiles volcanoes at a depth of less than 10 km.

By the end of November 2014 over 132,000 earthquakes occurred within a narrow area .5 – 6 km SW of the summit of Chiles.

The Aguas Hediondas spring is located in 2 miles (3.2 km) to the east of the volcano summit in Ecuador a few hundred meters from the border with Colombia.

The other hot springs group, called Aguas Termales de Tufiño, are located five miles to the east of the summit on the Colombia side of the border.

The owners of these pools reported to Yachay Tech professors that the October 2014 Chiles-Cerro Negro earthquake swarm resulted in a visible change the water color that lasted several days before returning to the previous composition.