Emission rates of CO2, SO2, and H2S, scrubbing, and preeruption excess volatiles at Mount St. Helens, 2004-2005: Chapter 26 in A volcano rekindled: the renewed eruption of Mount St. Helens, 2004-2006
Professional Paper
1750-26
This report is Chapter 26 in A volcano rekindled: the renewed eruption of Mount St. Helens, 2004-2006. For more information, see: Professional Paper 1750
By: Terrence M. Gerlach, Kenneth A. McGee, and Michael P. Doukas
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Abstract
Airborne surveillance of gas emissions began at Mount
St. Helens on September 27, 2004. Reconnaissance measurements--SO2
column abundances and CO2
, SO2
, and H2
S
concentrations--showed neither a gas plume downwind of
the volcano nor gas sources within the crater. Subsequent
measurements taken during the period of unrest before the
eruption began on October 1 and for several days after October
1 showed only small point sources of gas within the crater.
These sources defined a pattern of scrubbed degassing that
evolved from near-zero emissions, to scattered CO2
-only
sources, to growing sources of CO2
with minor H2
S and SO2
,
and finally to myriad sources of CO2
with increasingly SO2
-
dominant sulfur gases. Scrubbing strongly hydrolyzed SO2
but
also affected CO2
and H2
S.
Study Area
| Publication type | Report |
|---|---|
| Publication Subtype | USGS Numbered Series |
| Title | Emission rates of CO2, SO2, and H2S, scrubbing, and preeruption excess volatiles at Mount St. Helens, 2004-2005 |
| Series title | Professional Paper |
| Series number | 1750-26 |
| DOI | 10.3133/pp175026 |
| Year Published | 2008 |
| Language | English |
| Publisher | U.S. Geological Survey |
| Publisher location | Reston, VA |
| Contributing office(s) | Volcano Hazards Program |
| Description | 29 p. |
| Larger Work Type | Report |
| Larger Work Subtype | USGS Numbered Series |
| Larger Work Title | A volcano rekindled: the renewed eruption of Mount St. Helens, 2004-2006 (Professional Paper 1750) |
| First page | 543 |
| Last page | 571 |
| Country | United States |
| State | Washington |
| Other Geospatial | Mount St. Helens |
| Google Analytic Metrics | Metrics page |