HR: 1400h
AN: V33A-09    [Abstracts]
TI: POPOCATEPETL VOLCANO'S ACTIVITY FROM JULY 2005 TO FEBRUARY 2007
AU: Martin, A
EM: analil@igeofcu.unam.mx
AF: Instituto de Geofisica, UNAM , Mexico, DF 04510, Mexico
AU: * Alarcon, A M
EM: mariana@cenapred.unam.mx
AF: CENAPRED, Delfin Madrigal 665, Coyoacan, Mexico, DF 04360, Mexico
AU: Martinez, A
EM: amb@cenapred.unam.mx
AF: CENAPRED, Delfin Madrigal 665, Coyoacan, Mexico, DF 04360, Mexico
AU: Gomez, A
EM: gvazquez@cenapred.unam.mx
AF: CENAPRED, Delfin Madrigal 665, Coyoacan, Mexico, DF 04360, Mexico
AU: De la Cruz, S
AF: Instituto de Geofisica, UNAM , Mexico, DF 04510, Mexico
AB: An increase in the frequency and magnitude of micro-seismicity started in 2005 is correlated with the lava dome that has been irregularly growing since July 2005. The lava dome has covered the floor of the internal crater and began a piston-like growth on the top of the previous dome, probably in August, 2006. On 4 and 5 August, 1 to 3 November 2006, and 2,3,4 and 22 february episodes of large-amplitude harmonic tremor are believed to reflect an increased rate of dome growth. On 27, 28 and 29 October 2006, eigth small explosions ejecterd incandescent debris on the slopes surrounding the crater rim. During November and December 2006, more episodes of low amplitude tremors were recorded. From August to December 2006 77 volcano-tectonic microearthquakes were detected, with magnitudes ranging between 2.0 and 3.0. From these, 66 were located below the crater at depths ranging between 3 and 7 km.
DE: 8419 Volcano monitoring (7280)
SC: Volcanology, Geochemistry, and Petrology [V]
MN: 2007 Joint Assembly