Effusive eruptions are different from explosive eruptions, which see magma torn apart as it rises to the surface, often sending up clouds of ash and disrupting air travel.
This weekend's eruption has not affected air travel or led to any reported injuries.
The eruption is not seen as a threat to towns nearby, according to the AP, and the steady flow of lava means people can get fairly close to the volcano without much risk — a move more and more visitors have been taking in recent days.