Andrew Alden is a writer, photographer, editor, and geological tour guide who spent six years with the U.S. Geological Survey, which included research excursions on land and at sea. He has been a writer on geological subjects since 1981 and host of the earthquakes conference on the online discussion platform The WELL (Whole Earth ‘Lectronic Link ) since 1992. He also wrote 214 articles for ThoughtCo over the course of more than 17 years. Alden is a longtime member of the Geological Society of America and AGU.
Andrew Alden holds a bachelor's degree in earth science from the University of New Hampshire.
ThoughtCo is a premier reference site focusing on expert-created education content.
We are one of the top-10 information sites in the world as rated by comScore, a leading Internet measurement company.
Every month, more than 13 million readers seek answers to their questions on ThoughtCo.
For more than 20 years, Dotdash brands have been helping people find answers, solve problems, and get inspired.
We are one of the top-20 largest content publishers on the Internet according to comScore, and reach more than 30% of the U.S. population monthly.
Our brands collectively have won more than 20 industry awards in the last year alone, and recently Dotdash was named Publisher of the Year by Digiday, a leading industry publication.