Abstract
Meru volcanic area is characterized by Pleistocene to recent volcanic activities found in the Northern Tanzania Divergence, an extension of the East Africa rift system. The last volcanic activity in the area recorded was a century ago and fumarolic activities within a Meru crater was recorded half a century ago. Landsat imagery result in conjunction with XRD result from rock samples is used to identify the possible hydrothermally altered area and hydrothermal alteration mineralogy.