ESCI 111 Week 5-6

Tectonic settings

The geological settings that influence volcanic activity, such as divergent margins, convergent margins, and intraplate hot spots.

Eruption styles

Different ways in which volcanoes release magma, including lava flows, domes, and explosive plumes, influenced by magma viscosity and gas content.

Types of magma

Varieties of molten rock with different compositions, mainly categorized based on silica content, affecting temperature, viscosity, and explosivity.

"Type" of volcano

Different classifications of volcanoes like fissure, shield, composite cones, caldera, and large igneous provinces, each with distinct eruption characteristics.

Where are Volcanoes on earth?

Locations of volcanoes based on tectonic settings like mid-ocean ridges, subduction zones, and hot spots, influencing their behavior and eruption styles.

Silica content

The main chemical index for categorizing magma types, affecting temperature, viscosity, and explosivity of volcanic eruptions.

Pyroclastic flows

Ground-hugging flows of hot particles and gases generated during explosive volcanic eruptions, posing a significant hazard to surrounding areas.

Plumes

Columns of fragmented magma particles and gases rising from volcanic vents, influenced by volatile content, magma viscosity, and gas escape.

Seismology

The study of seismic waves to detect and interpret volcanic earthquakes, aiding in monitoring active volcanoes and predicting eruptions.

Deformation

Monitoring volcanic deformation using geodetic techniques like GPS, tilt meters, and satellites to track changes in the volcano's shape and structure.

Volcanic gases/fluids

The chemical composition of gas emissions from volcanoes, providing insights into magma characteristics and eruption behavior.

Geological mapping

Mapping volcanic areas to assess eruption risks, plan for potential hazards, and understand the distribution of deposits from past eruptions.

Petrology and geochemistry

Studying minerals and their chemistry in lava to unravel the history of magma, aiding in understanding volcanic processes and eruption dynamics.

Numerical modeling

Using theoretical and mathematical models to predict volcanic eruption behavior and simulate different scenarios for hazard assessment.

Pyroclastic flows

Fast-moving, destructive currents of hot gas and volcanic matter that can devastate everything in their path, posing a severe hazard during eruptions.