HR: 0800h
AN: V41A-09 [Abstracts]
TI: SO2 Monitoring of Popocatépetl Volcano (Mexico) Using MODIS (November 2006-February 2007): Comparison and Coupling with COSPEC and Seismic Data
AU: * Jimenez Escalona, J C
EM: jescalona@geofisica.unam.mx
AF: Instituto de Geofísica, Univesidad Nacional Autonoma de México, Ciudd Universitada,
Coyoacan, México, D.F 04510, Mexico
AU: Delgado Granados, H
EM: hugo@tonatiuh.igeofcu.unam.mx
AF: Instituto de Geofísica, Univesidad Nacional Autonoma de México, Ciudd Universitada,
Coyoacan, México, D.F 04510, Mexico
AU: Martínez Bringas, A
EM: amb@cenapred.unam.mx
AF: CENAPRED, Delfin Madrigal 665 Sto Domingo, Coyoacan, México, D.F 04360, Mexico
AU: Cárdenas González, L
EM: lcgpeak@cenapred.unam.mx
AF: CENAPRED, Delfin Madrigal 665 Sto Domingo, Coyoacan, México, D.F 04360, Mexico
AU: Realmuto, V
EM: "Vincent J. Realmuto"
AB:
Popocatépetl volcano in Mexico (19.020N, 98.620W, 5425 masl) has been erupting since December 1994.
Since March 1996 the eruption style has been characterized by alternating explosive and effusive activity,
accompanied by high-volume emissions of SO2. For more than a decade, the degassing has been documented
with COSPEC and, more recently, a scanning mini-DOAS system. We complement our field-based surveys with
satellite-based remote sensing, deriving maps of SO2 and ash clouds from MODIS imagery. Here we present
MODIS-based SO2 retrievals for the period November 2006 - February 2007, compare these results with our
COSPEC and DOAS measurements,and discuss the joint interpretation of the gas emission and seismic
records for this period.
Starting in 2005, there has been an increase in activity represented by the frequency and magnitude of micro-
seismicity as well as emissions of gases and ash to the atmosphere. Measurements showed that SO2
emission rates show a high variation, especially in order-of-magnitude changes. Data obtained from MODIS
images permit to characterize periods with peaks up to 40000 t/d by November 2006. Also, it is observed that the
SO2 emission maintains their magnitude after December 20, 2006 when light emissions of ash occurred. At this
time a lava dome was growing inside the crater of the volcano and continued up to January. In November, January
and February tremor episodes have been occurring and a destruction of the dome produced by an explosive
event is likely. The analysis and interpretation of the data help to forecast important eruptive events.
DE: 8419 Volcano monitoring (7280)
DE: 8428 Explosive volcanism
DE: 8430 Volcanic gases
DE: 8485 Remote sensing of volcanoes
DE: 8488 Volcanic hazards and risks
SC: Volcanology, Geochemistry, and Petrology [V]
MN: 2007 Joint Assembly