How do scientists know when a volcano is about to erupt? What would happen if Yellowstone’s supervolcano erupted? And what would happen if every volcano on earth erupted at once? All these questions (and a whole lot more)are answered by our intrepid science reporters, Jeanna and Mindy.
- Warning signs can begin weeks or months before an eruption
- Some of the many signs a volcanologist will look for include seismographic detection of earthquakes and tremors and analyzing cracking patterns in the ground in close proximity to the volcano
- Yellowstone National Park is made up of three overlapping calderas
- Calderas are bowl-shaped craters that were formed after three giant eruptions occured 2.1 million, 1.3 million and 640,000 years ago.
- Worldwide 1,500 potentially active volcanoes, around 500 of which have erupted during recorded human history.
- That number excluded the amount of volcanoes on the seafloor.