By the second day the activity stopped in all but one fissure where the main crater formed.

Strong fumarolic emission from the main crater was observed on August 12, 1996.

At the bottom of the main crater is a lagoon.

The site encompasses all land above the 2200 m contour surrounding the main crater.

It is a very nice spot, with cultured gardens in the main crater, almost impossible to approach except by air.

The main crater has become well-known and is now a popular tourist destination.

The main crater is about two km wide and usually contains a lava lake.

They are all within one kilometer of the main crater.

Two smaller but notable craters lie just to the south of the main crater.

Thus a crater due south of the main crater was given the letter 'M'.