Poet Craig Arnold, a professor at the University of Wyoming who earned his doctorate at the University of Utah, has gone missing.

As the Tribune's Ben Fulton reports, the 41-year-old Arnold was visiting a volcanic island off Japan's southern coast on April 27, researching a book on active volcanoes. The last post on his blog, Volcano Pilgrim, was dated April 26.

Authorities in Japan have been searching for Arnold, and Wyoming's congressional delegation has urged the U.S. government to coordinate efforts with the Japanese government.