Talk:Mount Pinatubo

Ejecta volume: lead says roughly 10 km3, narrative says more than 5 km3

The article gives two very different figures for the volume of material ejected during the 1991 eruption of Mount Pinatubo.

Lead section: "The 1991 eruption had worldwide effects. It released roughly 10 km³ of magma."

Narrative section (describing the June 15 climactic eruption): "When even more highly gas-charged magma reached Pinatubo's surface on June 15, the volcano exploded in a cataclysmic eruption that ejected more than 5 km³ of material."

These figures differ by approximately a factor of two. Both appear to be describing the same event — the 1991 eruption as a whole and its climactic June 15 phase respectively — but there is no explanatory text bridging the gap. It is possible the lead's "10 km³" represents total erupted volume (bulk) while the narrative's "5 km³" is the dense-rock equivalent (DRE) for just the June 15 phase, but the article does not distinguish between these measurement conventions.

Without clarification, a reader cannot know which figure to trust or whether they are measuring the same thing. Both sections should cite their sources and specify whether the figure is bulk tephra, DRE, or total magma equivalent. Rome (talk) 17:50, 5 May 2026 (UTC)