What is this?
Earthquake
What is this?
Volcanic eruption
What is this?
Wildfire
What is this?
Drought
What is this?
Tsunami
What is this?
Tornado
What is this?
Flood
What is this?
Landslide
What is this?
Oil spill
What is this?
Meteorite strike
What is an Earthquake?
An earthquake is a sudden, rapid shaking of the ground caused by the breaking and shifting of rock beneath the Earth's surface.
What causes an earthquake?
...
How do we measure earthquakes?
Earthquakes are measured using instruments called seismographs (or seismometers), which detect and record ground vibrations (seismic waves)
What is the Pacific "Ring of Fire"?
90% of the world' earthquakes happen there
What is the layer of the Earth where earthquakes occur?
The crust
