Publication Date:
2020-12-15
Description:
We have analyzed Long-Period (LP) seismic events of Volcan de
Colima (Mexico) recorded by four three-component broad-band seismometers
during January 2006. Frequency-domain analysis shows broad-band spectra
mainly in the range 0.3-2 Hz characterized by a monotonic decreasing envelope,
as those observed in a cylindrically-symmetric self-oscillating cavity interacting
with a confined jet. Independent Component Analysis, a time decomposition
method extracts two or three nonlinear oscillation modes depending on the
station, with the fundamental one peaked at [0.4-0.5]Hz. These decomposed
waves are self-sustained oscillations with low dimensionality and a well defined
spectral content. Moreover, they show radial polarization in near field and
transverse polarization in far field in North-West South-East direction. Finally, we depict a branched plumbing system with two principal conduits directed along orthogonal directions.
Description:
Submitted
Description:
3.6. Fisica del vulcanismo
Description:
JCR Journal
Description:
restricted
Keywords:
Colima volcano
;
volcanic explosions
;
04. Solid Earth::04.06. Seismology::04.06.08. Volcano seismology
Repository Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Type:
manuscript
Permalink
