Why Yellowstone's Earthquakes Mix Two Forces
Read the whole story in the app
In the app: the whole story at your level, listening, the quiz and the word cards.
The same story at six levels
How the first sentence reads at every level, from A1 to C2.
- A1
David Shelly from the USGS studies Yellowstone earthquakes.
- A2
David Shelly from the USGS studies earthquakes at Yellowstone.
- B1
David Shelly is a scientist with the United States Geological Survey (USGS).
- B2
David Shelly is a seismologist with the United States Geological Survey (USGS).
- C1
Around the world, most earthquakes fall into one of two categories.
- C2
Around the world, most earthquakes fall into one of two categories.
Key words
Words from the B1 text, with their meaning.
- shell
- a hard outer layer or covering of something
- stretch
- to cover a large area of land from one place to another
- magnitude
- the size or strength of an earthquake
- swarm
- a large group of things happening or moving together
- fault
- a large crack in the rock under the ground
- weaken
- to make something less strong
Rewritten with AI from facts reported by USGS. Read the original for the full report.