  We have studied the geological time evolution of volcanism in Earth and other
inner solar system planetary bodies (Mercury, Moon, Mars and Venus) in both
geophysical and biophysical perspective. The record of Large Igneous Provinces
in Earth and other planetary objects suggest the existence of increasing,
decreasing and cessation phases of major volcanic activity over geological time
scales. We have extended the existing scale of measuring intensity of volcanic
eruptions based on Earth based observations to accommodate intense and extreme
volcanic activity. The mass of a rocky planetary object is found to be related
to the magnitude of the internal heat, occurrences of Large Igneous Provinces
and the duration of major volcanic activity from relevant data available for
the inner solar system. The internal heat magnitude may also decide the
intensity of volcanism in these planetary objects. The time evolution of
volcanism in Earth and Mars has probably influenced the origin of life and
biological evolution in these planets.
