Question: what are the early signs of volcanic eruption?
Answer: Before an Eruption. Before a volcano erupts, there is normally an increase in earthquakes and tremors near and under the volcano. ... 
Volcanic Gas. During an eruption of a volcano, gases dissolved in the magma are released into the air. ... 
Lava. ... 
Volcanic Landslide. ... 
Pyroclastic Flows. ... 
Volcanic Ash.