Fissure formation
Ash from the eruption had darkened the area around the volcano for 3 days and 3 nights. Then, it was discovered that the eruption formed a 500-meter- long fissure. But the cracks in the land led to something bigger.
Source: Amusing Planet
What seemed to be a harmless crack on the surface widened within days. Some parts were as wide as 6 meters. It was estimated that the entire crack’s volume was enough to fill up millions of Olympic swimming pools.