A Compilation of Sulphur Dioxide and Carbon Dioxide Emission-Rate Data from Cook Inlet Volcanoes, 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.