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TerraLens

Realm

Hazards

Sudden Earth

Quakes, volcanoes, tsunami, tropical cyclones. Sudden Earth, drawn as a process.

An eruption column — process as a hazard.
An eruption column — process as a hazard. This is the classroom sense of hazards: a named landform, process, or object. Source: Wikimedia Commons / NASA / USGS / NOAA, public domain or CC.Wikimedia Commons / NASA / USGS / NOAA, public domain or CC
A surface rupture: the fault reached the ground.
Hazards

Earthquakes

Focus is in the rock. Epicentre is the map dot. P, then S, then the surface wave that does the damage in town.

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A steep stratovolcano cone.
Hazards

Volcanoes

Viscosity is the plot. Shield, strato, rift — three shapes from one slider.

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A tsunami’s run-up on a coast.
Hazards

Tsunami

Seafloor slip lifts a water column. In deep water the wave is fast and low. At the coast it stands up.

GCSENGSS MSHS Earth Sci
A tropical cyclone with a clear eye.
Hazards

Tropical cyclone

Eye, eyewall, rainbands. Warm sea is the fuel. A UK depression is usually a different machine.

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Surge flooding on a low coast.
Hazards

Storm surge

The 1953 North Sea flood was wind piling water onto a shelf. Katrina’s surge was the same machine on the Gulf. It is not a tsunami.

GCSENGSS MSHS Earth Sci