A. J. Sutton J. B. Stokes T. J. Casadevall Tamar Elias 1998 <p>Sulfur dioxide (SO₂) emission rates from Kilauea Volcano were first measured by Stoiber and Malone (1975) and have been measured on a regular basis since 1979 (Casadevall and others, 1987; Greenland and others, 1985; Elias and others, 1993; Elias and Sutton, 1996). The purpose of this report is to present a compilation of Kilauea <span>SO</span>₂ emission rate data from 1979 through 1997 with ancillary meteorological data (wind speed and wind direction). We have included measurements previously reported by Casadevall and others (1987) for completeness and to improve the usefulness of this current database compilation.</p><p>Kilauea releases <span>SO</span>₂ gas predominantly from its summit caldera and rift zones (fig. 1). From 1979 through 1982, vehicle-based COSPEC measurements made within the summit caldera were adequate to quantify most of the <span>SO</span>₂ emitted from the volcano. Beginning in 1983. the focus of <span>SO</span>₂ release shifted from the summit to the east rift zone (ERZ) eruption site at <span>Pu'u 'O'o</span> and, later, Kupaianaha. Since 1984, the Kilauea gas measurement effort has been augmented with intermittent airborne and tripod-based surveys made near the ERZ eruption site. In addition, beginning in 1992 vehicle-based measurements have been made along a section of Chain of Craters Road approximately 9 km downwind of the eruption site. These several types of COSPEC measurements continue to the present.</p> application/pdf 10.3133/ofr98462 en U.S. Geological Survey Sulfur dioxide emission rates of Kilauea Volcano, Hawaii, 1979-1997 reports