Taal Volcano located only 60 kilometers
southeast of Manila is one of the more
active volcanoes of the Philippines.
Since 1572 it has had 30 eruptions, with
perhaps those of 1754 and 1911 as being
the most destructive. Accounts of
eruptions prior to that of September 30,
1965, however, were mainly descriptive
narratives of what transpired during the
eruptions. There were hardly any mention
made of precursory signs noticed before
the events except for occasional
reference to some macroseismic tremors
preceding a few of the eruptions.
Information, therefore, that would have
been helpful in predicting its eruptions
was sadly lacking until about a decade
ago when the Philippine Commission on
Volcanology, a government agency
specially created to study the active
volcanoes of the archipelago, started to
employ surveillance techniques aimed at
prognosticating the behavior of Taal.
Now after ten years of monitoring
scientifically and methodolically the
condition of this potentially
destructive volcano, and after five
eruptions within that period, it may be
said that much is already known of its
pre·eruption behavior as to allow
Filipino volcanologists to reasonably
predict its future eruptions.