Intensity - John Seach
of a volcanic eruption is the mass eruption rate in kg/s.
and magnitude are required to fully describe the size of a volcanic eruption.
explosive index (VEI) is a non comprehensive scale used for ancient eruptions.
log10 (mass eruption rate kg/s) + 3
The intensity scale is from 1 (lowest)
to 12 (highest)
Examples of volcanic intensities
Laki 1783 (Iceland) 10.4
Nyiragongo 1977 (DR Congo) >10
Mauna Loa 1950 (Hawaii) 9.8
Sakurajima 1914 (Japan) 9.7
Hekla 1991 (Iceland) 9.6
Kilauea 1965 (Hawaii) 9
Augustine 1986 (Alaska) 5.1
Copyright John Seach