Brendan Hodge, who just completed his Master of Geology degree at Western Washington University, has published his thesis as a journal article. Brendan’s research used Global Positioning System surveys to measure minute changes in the shape of Mount Baker over a period of years, and then used that data to suggest that a magma chamber has been cooling and contracting beneath the volcano. The evidence for this is ‘shortening’, or decreasing distances between measured locations on Baker’s surface, obtained by the GPS survey . You can read the abstract here. The paper’s coauthor is Dr. Juliet Crider, who was the chair of Brendan’s thesis committee. The reference for the paper is:
Hodge, B. E., and J. G. Crider (2010), Investigating mechanisms of edifice deflation, 1981–2007, at Mount Baker volcano, Washington, United States: Journal of Geophysical Research, vol. 115, B04401. doi:10.1029/2009JB006730
I will post a link to obtain the pdf when that is available online, unless you prefer to download it now for a fee.