The Earth and Environmental Science Department will host Dr. Ronni Grapenthin of the University of California, Berkeley for the weekly seminar. Grapenthin will present, "Plumbing, Plumes, and Early Warning: GPS Near Volcanoes and Fault Zones." Sponsored by the Department of Earth & Environmental Science and New Mexico Bureau of Geology & Mineral Resources. Hosted by Dr. Glenn Spinelli. 4 p.m. in MSEC 101.