The platform 8460, owned by the French D.R.M., has been settled on the Mount Soputan (North Sulawesi) following the been unforecasted eruption of April 1989. The intervention has possible within a very short time after the first detection of an abnormal activity because this platform was to be installed by the V.S.I. on the mount Lokon near the mount Soputan at this period. Much practical know…