HR: 1330h
AN: V52B-0431    [PDF]
TI: Integration of Seismic and Video Records of Eruptive Activity on Santiaguito Volcano, Guatemala
AU: * Dalton, M P
EM: mpdalton@mtu.edu
AF: Dept. of Geological Engineering and Sciences, Michigan Technological University, 1400 Townsend Dr., Houghton, MI 49931-1295 United States
AU: Head, E M
EM: emhead@mtu.edu
AF: Dept. of Geological Engineering and Sciences, Michigan Technological University, 1400 Townsend Dr., Houghton, MI 49931-1295 United States
AU: Bluth, G J
EM: gbluth@mtu.edu
AF: Dept. of Geological Engineering and Sciences, Michigan Technological University, 1400 Townsend Dr., Houghton, MI 49931-1295 United States
AU: Rose, W I
EM: raman@mtu.edu
AF: Dept. of Geological Engineering and Sciences, Michigan Technological University, 1400 Townsend Dr., Houghton, MI 49931-1295 United States
AU: Molina, E
EM: emolina@insivumeh.gob.gt
AF: INSIVUMEH, 7a. Avenida 14-57, Zona 13, Guatemala City, 01013 Guatemala
AU: Toorongian, J E
EM: jetooron@mtu.edu
AF: Information Technology, Michigan Technological University, 1400 Townsend Dr., Houghton, MI 49931-1295 United States
AB: Santiaguito is a long-lived, dacitic volcanic dome complex, which has now been continuously active since 1922. The volcano's longevity is thought to be related to a large magma body and the pattern of extrusion is notably unsteady. Direct observations of activity are inhibited by logistics, such as cloudy weather at proximal vantage points after mid morning. Activity observable at Santiaguito each morning includes multiple vertical explosions, dome and flow collapses leading to block and ash flows or rock avalanches, steam exhalations and fumarolic discharges. These phenomena were recorded on digital video from an excellent vantage point (the summit of Santa Maria) located 1200 m above and 2.5 km NE of the active Caliente Vent of Santiaguito for about three hours on the morning of January 11, 2003, and from El Brujo Vent, located $\sim$200 m below and 1.2 km W for about four hours on the morning of January 9, 2003. The volcano is also ismically monitored, and we have synchronized the video with digital seismic data processed through the Seisan computer program. Our expected result is a correlated record of seismic data and visually-identified eruptive activity, allowing us to evaluate eruption characteristics. This will be in the form of a digital video of surface activity on Santiaguito with corresponding seismic signals, which will be applicable for education and scientific analysis. By correlating seismic signals to eruptive activity, monitoring agencies that are distant from the volcano can better interpret the incoming seismic data, and communicate a more complete picture of volcanic activity to the surrounding communities. It also allows us to go back through the seismic record from Santiaguito and catalog past eruptive activity. A synchronized seismic and eruptive activity video is also a valuable educational/ outreach tool. With the technique for correlating video and seismic records established, additional types of data (such as temperature and gas readings) can be compared as well.
DE: 7280 Volcano seismology (8419)
DE: 8419 Eruption monitoring (7280)
DE: 8494 Instruments and techniques
DE: 8499 General or miscellaneous
SC: Volcanology, Geochemistry, Petrology [V]
MN: 2003 Fall Meeting