Whose June 1991 eruption in the Zambales Mountains was the second-largest volcanic eruption on Earth of the 20th century?

Answer and explanation

Correct answer: A. Mount Pinatubo

  1. Step 1: As the storm moved across Luzon, Mount Pinatubo, a volcano in the Zambales Mountains on the island's western side, was experiencing a major eruption, the second-largest to occur during the 20th century. Answer: Mount Pinatubo. Why not the others: None of these fit: Mayon Volcano Albay eruption; Taal Volcano caldera eruption; Mount Hibok-Hibok Camiguin eruption.

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