'Wolf' volcano erupts on Galapagos Islands
There are five active volcanoes on Isabela: Wolf, Sierra Negra, Cerro Azul, Darwin and Alcedo. According to the national park authorities, Wolf's first recorded eruption happened in 1797. There were 10 subsequent eruptions, including the last in 1982. In April, unusual seismic activity was reported at the Sierra Negra volcano.