The volcano erupted on January 14, with lava pouring from fissures ... of Fagradalsfjall." Now, the "crack collapse" may occur in areas of the town where the ground is already unstable, and ...

Lava flows are masses of magma that pour onto ... a large elongated fissure or fracture (as seen on the diagram above) or a tiny ground crack. Nyiragongo is notorious for releasing large amounts ...