USGS/Cascades Volcano Observatory, Vancouver, Washington
Sulfur dioxide and carbon dioxide fluxes measured
at Crater Peak, Mount Spurr volcano, Alaska, 1991-1993
-
From:
Sulfur Dioxide Scrubbing During the 1992 Eruption of Crater Peak,
Mount Spurr Volcano, Alaska
by:
Michael P. Doukas 1
and Terrence M. Gerlach 2
1 U.S. Geological Survey, Alaska Volcano Observatory,
4200 University Dr., Anchorage AK 99508-4667
2 U.S. Geological Survey, Cascades Volcano Observatory,
5400 MacArthur Blvd, Vancouver, WA 98661-7095
IN:
Keith, T.E.C., ed., 1995, The 1992 eruptions of Crater Peak vent, Mount Spurr
volcano, Alaska: U. S. Geological Survey Bulletin B-2139, 220p, p.47-57.
[d-m-y, day-month-year; t/d, metric tons/day; avg, average value;
max, maximum value; min, minimum value; sd, standard deviation;
n, number of SO2 determinations; BG, background; NM, not measured;
>, minimum value]
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Date SO2 SO2 SO2 SO2 SO2 CO2 CO2/SO2
avg max min sd n (wt)
(d-m-y) (t/d) (t/d) (t/d)
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22-07-91 BG BG BG - - NM -
===> Precursory seismic activity starts beneath Crater Peak, August 1991
21-08-91 BG BG BG - - NM -
29-08-91 BG BG BG - - NM -
03-09-91 85 97 72 18 2 NM -
22-11-91 BG BG BG - - NM -
14-05-92 88 96 80 10 2 NM -
===> Volcano-tectonic earthquakes peak, June 5, 1992
===> First volcanic tremor bursts, June 6, 1992
08-06-92 21 24 18 4 2 NM -
===> Eruption, June 27, 1992
29-06-92 5 10 2 3 5 NM -
===> Eruption, August 18, 1992
10-09-92 BG BG BG - - NM -
===> Volcanic tremor episodes, September 12-25, 1992
===> Eruption, September 16-17, 1992
21-09-92 23 38 10 12 5 NM -
23-09-92 24 33 22 7 4 NM -
24-09-92 79 92 72 11 3 NM -
25-09-92 300 370 240 54 4 11,000 53
28-09-92 190 270 180 25 4 12,000 90
29-09-92 750 830 690 75 3 8,700 17
===> Volcanic tremor episode, October 2-5, 1992
02-10-92 450 450 450 0 2 NM -
03-10-92 220 320 110 110 4 4,800 32
04-10-92 210 320 170 72 4 3,500 24
05-10-92 360 560 230 170 4 2,900 12
10-10-92 240 360 160 100 3 NM -
===> Volcanic tremor episode, October 12, 1992
14-10-92 47 50 44 4 3 2,400 74
15-10-92 64 67 62 4 2 NM -
16-10-92 >200 - - - - >2,000 -
19-10-92 BG BG BG - - BG -
23-10-92 24 26 22 3 2 2,100 127
29-10-92 BG BG BG - - BG -
===> Earthquake swarms, November 9, 1992
10-11-92 BG BG BG - - BG -
11-11-92 BG BG BG - - BG -
12-11-92 BG BG BG - - 1,100 infinite
13-11-92 BG BG BG - - 1,000 infinite
15-11-92 BG BG BG - - 1,000 infinite
08-12-92 BG BG BG - - >1,000 infinite
11-12-92 BG BG BG - - >500 infinite
15-12-92 BG BG BG - - 3,200 infinite
18-12-92 BG BG BG - - >1,000 infinite
===> Swarm of small VT earthquakes, December 21-26, 1992
23-12-92 BG BG BG - - >1,000 infinite
21-01-93 BG BG BG - - >1,000 infinite
18-02-93 BG BG BG - - >400 infinite
===> Seismicity at pre-August 1991 levels, April 1993
24-04-93 BG BG BG - - >930 infinite
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