A compilation of sulphur dioxide and carbon dioxide emission-rate data from Cook Inlet volcanoes (Redoubt, Spurr, Illiamna, and Augustine), Alaska during the period from 1990 to 1994

This report contains all of the available daily sulfur dioxide and
carbon dioxide emission rates from Cook Inlet volcanoes as
determined by the U.S. Geological Survey (USGS) from March 1990
through July 1994. Airborne sulfur dioxide gas sampling of the
Cook Inlet volcanoes (Redoubt, Spurr, Iliamna, and Augustine)
began in 1986 when several measurements were carried out at
Augustine volcano during the eruption of 1986. Systematic monitoring
for sulfur dioxide and carbon dioxide began in March 1990 at
Redoubt volcano and continues to the present. Intermittent
measurements at Augustine and Iliamna volcanoes began in 1990 and
continues to the present. Intermittent measurements began at Spurr
volcano in 1991, and were continued at more regular intervals from
June, 1992 through the 1992 eruption at the Crater Peak vent to the
present.