These histograms represent our calibration of conductance of a volcanic geothermal field (with a clay cap) and the observed steam flow rates. Darajat is a vapor geothermal field located in West Java, Indonesia. First production from the field was started in 1994 and additional capacity was added in 2000 and 2007 to bring the total production capacity to 271 MW from three power plants. Please refer to Rejeki et al. (2010) for geologic and modeling background. The steam flow measurements are the average production over one year for 27 different wells. Four of these wells were drilled near to or outside of the geothermal field and are characterized by production rates of < 5kg/s. Rejeki, S., Rohrs, D., Nordquist, G., and Fitriyanto, A., 2010, Geologic Conceptual Model Update of the Darajat Geothermal Field , Indonesia, in Proceedings World Geothermal Congress 2010, p. 25-29. Further details will be contained in the following paper to be published in the fall of 2015: Trainor-Guitton, Hoversten,Nordquist, Intani, Value of information analysis using geothermal field data: accounting for multiple interpretations & determining new drilling locations. SEG Abstracts 2015.