Fuego is erupting ash clouds. These clouds reach an altitude of 4600 m above sea level and drift up to 20 km. According to INSIVUMEH, glowing tephra are ejected up to 400 m above crater height. Every hour between 15 and 18 explosive eruptions are registered, whose pressure waves cause vibrations in villages. There are loud gas eruptions that last up to 12 minutes. Such gas eruptions can become very loud and the neck hairs of the observers can be raised.