How Volcanoes Work — Integrated Eruption Dynamics Intelligence

KBT-CASHMAN-HOWVOLCWORK-1.0

Core thesis The transition between effusive and explosive volcanism is controlled by the competition between degassing rate and crystallization in the volcanic conduit — and integrating magma rheology, conduit dynamics, and surface observations provides a unified model for eruption style prediction.

Primary frameworks

• Conduit Degassing Models — open vs. closed system degassing and its effect on eruption explosivity
• Crystallization-Degassing Coupling — how vesiculation, crystallization, and permeability interact in the conduit
• Effusive-Explosive Transition Threshold — conditions controlling style switching during a single eruption
• Magma Fragmentation Criteria — strain rate and brittleness thresholds for pyroclast generation
• Permeability Development — connected porosity enabling outgassing vs. pressurization
• Dome vs. Column Eruption Stability — conduit geometry and magma flux controls on eruption mode
• Real-Time Observation Integration — linking monitoring signals to conduit processes

What this tile gives an agent:

• Apply degassing-crystallization coupling to predict eruption style from magma composition and ascent rate
• Evaluate fragmentation threshold conditions for explosive vs. effusive behavior prediction
• Reason about permeability development as the key control on eruption explosivity
• Apply conduit flow models to interpret monitoring signals (seismicity, deformation, gas)
• Support eruption style forecasting during unrest by integrating conduit physics with real-time data