research
The Plate Under the Mega-Eruption Was Rebuilt From Within
Seismic waves reveal horizontal layers cut by vertical dike swarms beneath the Ontong Java Plateau.
Summary
Seismic waves reveal horizontal layers cut by vertical dike swarms beneath the Ontong Java Plateau.
Researchers used Po and So seismic waves recorded by ocean-bottom and island instruments to model the structure under the world's largest oceanic plateau. Efficient Po transmission and weakened So waves fit a composite plate crossed by broad vertical magma intrusions, while unusually slow velocities suggest chemical alteration as magma rose. The analysis reconstructs a 110- to 120-million-year-old event from present-day wave behavior; it does not directly observe the ancient flow.
Why it matters
Seismic waves reveal horizontal layers cut by vertical dike swarms beneath the Ontong Java Plateau.
Limits and context
- The analysis reconstructs a 110- to 120-million-year-old event from present-day wave behavior; it does not directly observe the ancient flow.
Key claims
Seismic waves reveal horizontal layers cut by vertical dike swarms beneath the Ontong Java Plateau.
Qualification: The analysis reconstructs a 110- to 120-million-year-old event from present-day wave behavior; it does not directly observe the ancient flow.
Evidence: source-2026-07-19-009
Sources
- Okayama University of Science via ScienceDaily: Ontong Java PlateauOkayama University of Science via ScienceDaily · secondary reporting
Corrections
No corrections have been recorded for this story.