Learn: Tectonic Hazards

Welcome!Today we'll learn about tectonic hazards. These include events like earthquakes and volcanic eruptions caused by movements of the Earth's tectonic plates. Let's dive in!

What are tectonic hazards?Tectonic hazards are natural events caused by the movement of tectonic plates. These include earthquakes, volcanoes, and tsunamis. They can have serious impacts on people and the environment.

Plate tectonics theoryThe Earth's crust is divided into large sections called tectonic plates. These plates float on the semi-molten mantle and move slowly due to convection currents caused by heat from the Earth's core. Their interactions cause tectonic hazards.

Types of plate boundariesThere are three main types of plate boundaries:Constructive margins: Plates move apart, allowing magma to rise and create new crust.Destructive margins: Plates collide, and one plate is forced under the other, causing earthquakes and volcanoes.Conservative margins: Plates slide past each other, causing earthquakes.

Primary and secondary effects of tectonic hazardsPrimary effects are immediate impacts, such as collapsed buildings and injuries. Secondary effects are indirect impacts, like fires, landslides, or disease outbreaks caused by disrupted infrastructure.

Immediate and long-term responsesAfter a tectonic hazard, responses can be immediate, like rescuing people and providing emergency aid. Long-term responses focus on rebuilding infrastructure and helping communities recover.

Why do people live in hazardous areas?Some people choose to live in areas at risk of tectonic hazards because of benefits like fertile soils near volcanoes, geothermal energy, or tourism opportunities. Others may stay due to lack of alternatives or cultural ties.

Reducing risk from tectonic hazardsRisk can be reduced through monitoring (watching for signs like tremors), prediction (forecasting events), protection (building earthquake-resistant structures), and planning (educating people and preparing evacuation plans).

Review Time!Great work! You've learned about tectonic hazards, plate margins, effects, responses, and risk reduction. Let's review key concepts with a few questions.