World's largest active volcano Mauna Loa erupts on Big Island

 

 

ash	ash is the grey or black powdery substance that is left after something is burnt
debris	pieces, remains or pieces from an explosion or the destruction of something larger
rift zone	area where the volcano is rifting or splitting apart
evacuate	to move people from a dangerous place to somewhere safe
oceanogrphic	related to the science of the oceanm including chemistry, geology, meteorology