He is a recent convert to blog reading. He says:
.... but what’s the point? Why do these geologists write blogs and what is their value? A recent survey of the geoblogosphere conducted by Lutz Geissler of the Technical University Bergakademie in Freiberg, in collaboration with Robert Huber of the University of Bremen and Callan Bentley of Northern Virginia Community College, helps answer the first question and informs the second. The equally top-ranked responses to the question “why do you blog?” were “to inform”, “to share knowledge”, and “to popularise the geosciences” (followed closely by “to have fun”).
Combine this motivation and energy with the significant audience for many of these blogs, and there is arguably the prime value: knowledge-sharing and outreach...
What the majority have in common, however, is that they are current and immediate. Whether reporting on an ongoing research or fieldwork project, a volcanic or seismic event, providing links to newly published papers, or seeking ideas on the design of a new course, these blogs represent a unique means of rapidly disseminating – and accessing – information and ideas.