The beginning of the amazing events at Krakatoa in 1883 date to May 20 when there were initial rumblings and venting from the volcano, which had been dormant for about 200 years.
A refinery margin is the revenue associated with refining petroleum, expressed as a value per volume (e.g. $/L), net of the cost of the crude oil input. The simplest refining
Gross refining margins fall to four-year low as fuel prices slump. Indian Oil, Bharat Petroleum and Hindustan Petroleum are operating at GRMs which are the lowest in the last four fiscals.