Evaluation of Redoubt Volcano's sulfur dioxide emissions by the Ozone Monitoring Instrument

► Linear correlations between OMI and airborne SO2 column densities are found. ► A linear correlation between OMI-derived and airborne SO2 emission rates is found. ► OMI-derived emission rates underestimate SO2 relative to airborne measurements. ► Correlations between daily SO2 masses and eruptive activity are observed. ► OMI is a useful tool for measuring volcanic SO2 emissions remotely.