USGS EarthWord of the Week
EarthWords is an on-going series in which we shed some light on the complicated, often difficult-to-pronounce language of science. Think of us as your terminology tour-guides, and meet us back here every week for a new word!
The EarthWord: Tephra
Tephra is the general name given to anything thrown into the air during a volcanic eruption. It can range from individual ash particles all the way to volcanic bombs.
Tephra comes from the Ancient Greek tephra, meaning “ashes.”
Use/Significance in the Earth Science Community:
The various types of tephra can have far-ranging impacts on the environment and human society. Ash clouds can reach the upper atmosphere, temporarily lowering temperatures and potentially interrupting air travel. Cinders can blanket nearby ecosystems and communities, causing health problems and damaging infrastructure. And volcanic bombs can very actively and directly damage infrastructure.
USGS studies all types of tephra and their effects as part of our Volcano Hazards Program.
Next EarthWord: It’s not just teens that like to rebel; sometimes it’s rock layers...
Hungry for some science, but you don’t have time for a full-course research plate? Then check out USGS Science Snippets, our snack-sized science series that focuses on the fun, weird, and fascinating stories of USGS science.
Get Our News
These items are in the RSS feed format (Really Simple Syndication) based on categories such as topics, locations, and more. You can install and RSS reader browser extension, software, or use a third-party service to receive immediate news updates depending on the feed that you have added. If you click the feed links below, they may look strange because they are simply XML code. An RSS reader can easily read this code and push out a notification to you when something new is posted to our site.