Weather and Extreme Weather Events
Geological Events
Hyrdrological, Oceanic and Marine Events
Astronomical Events
Biological Events
100

A strong summer storm with lightning, heavy rain or strong winds. 

thunderstorm

100

The shaking of the ground cause by movement in the Earth's crust.

Earthquake

100

When water overflows onto normally dry land, often after heavy rain. 

flood

100

When the Moon moves in front of the Sun, blocking its light.

solar eclipse

100

When animals travel long distances to find food, mates or escape bad weather. 

migration of animals

200

A violent, spinnin column of air that touches the ground and causes destruction. 

Tornado

200

A hole that suddenly opens in the groun when underground support collapses.

sinkhole

200

Strong, narrow currents of water that pull swimmers away from shore. 

rip currents

200

When the Earth blocks sunlight from reaching the Moon, making it dark. 

lunar eclipse

200

This is what it is called when coral loses its color and weakens due to warm ocean temperatures. 

coral bleaching

300

A storm where balls of ice fall from the sky.

hailstorm

300

huge ocean waves caused by earthquakes or volcanic eruptions under the sea. 

tsunamis

300

Giant, unexpected ocean waves that can be dangerous for ships.

rogue waves

300

When a large space rock crashes into Earth's surface.

Asteroid impact

300

A huge group of flying insects that destroy crops and plants. 

locust swarms

400

This massive, spinning storm with strong winds and heavy rain forms over warm oceans. It goes by different names depending on where it occurs in the world. What three names do we call it?  

Typhoon, Hurricane, Cyclone

400

A large mass of snow and ice that falls quickly down a mountain. 

avalanche 

400

The wearing away of land along the coast due to waves and currents

coastal erosion

400

When a ball of ice and dust travelling around the Sun in its orbit passes close to Earth and becomes visible.

comet appearance

400

This is what it is called when too many algae grow in the water, making it harmful for fish and humans. 

Algal blooms / Red Tide

500

A severe snowstorm with strong winds and low visibility. 

blizzard

500

The sudden movement of soil (dirt) down a slope. 

landslide

500

A climate event where warm ocean water causes unusual weather around the world. 

El Niño

500

When a group of shooting stars streak across the night sky.

meteor shower

500

2024 marked the first time since 1803 that two of this type of insect broods—the 17-year Brood XIII, concentrated in northern Illinois, and the 13-year Brood XIX found in southern Illinois, Missouri, Arkansas and throughout the Southeast—emerged together.

cicadas

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