it be violent?
Depending on the type of volcano, various kinds of eruption are
possible, ranging from the very explosive to those on Hawaii where
the lava flow is relatively calm. Most of the volcanoes in the Philippines
are of the explosive variety and consequently pose a serious potential
risk to the environment.
It is difficult to say what kind of volcanic hazard could be faced.
In most cases it is a combination of various hazards. The assumption
is that future eruptions will be of the same type as past eruptions.
Descriptions of previous eruptions are often to be found in reports
or other historical documents. But in most cases these descriptions
do not make it possible to identify what kind of eruption took place
and when, and a detailed field study by geologists and volcanologists
is necessary before this can be ascertained. Modern carbon and other
dating methods allow us to determine when an eruption took place.
In this study, hazard zonation maps is drawn up for the Bulusan
volcano, for various types of eruption.