Conversion Unwrapp to Displacement (meters) in Geothermal Field

Hi everyone, i have a problem after unwrapping using sentinel 1A data, and i convert phase to displacement. My research wants to know the value of deformation in geothermal field, but the result is in meter and the range is 0,19 until 0,29 meters. is it too large ? This phase in one month from November 8, 2014 - December 26, 2014 the area is on Kamojang Geothermal field, West Java, Indonesia.