Mount Pinatubo has had at least six eruptive periods since 35,000 B.C.

They are:

• Inararo Eruptive Period (35,000 B.C.)
• Sacobia Eruptive Period (15,000 B.C.)
• Pasbul Eruptive Period (7,000 B.C.)
• Crow Valley Eruptive Period (4,000–3,000 B.C.)
• Maraunot Eruptive Period (1,900–300 B.C.)
• Buag Eruptive Period (A.D. 1,500)

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