Ecuador - Tungurahua volcano
As of the 1st of March it has been reported
from the El Instituto Geofísico de la Escuela Politécnica Nacional, the
following informational updates on volcano Tungurahua. With respect to
explosive activity, in last the 24 hours have entered 4 explosions, of
which three are excellent events. Two of them were moderate and they were
registered to 0044 and 0730 (local time), presenting/displaying Reduced
Displacements of 8.2 and 12 cm2. The last explosion was registered to 0930
and had a Reduced Displacement of 4.4 cm2. These explosions been have accompanied
by strong cannon shots, but given the climatic conditions they have not
been possible to make visual observations of the height of the columns
nor the direction of dispersion. With respect to seismic activity, 55 earthquakes
of type LP and 4 volcano-tectonic ones have been entered. Additionally,
from 2217 (local time) a harmonic tremor appeared that remained around
10 minutes. Additionally a signal generated by the passage of a mud flow
was registered in the sector of Cus=FAa. Personnel of the Institute mobilized
itself in hours of afternoon to this sector with the purpose of making
observations of the magnitude of the deposit. A section of the highway
that takes to Baths found interrupted by smaller flows. Visual observations
indicate that during the night continuous incandescence in the crater of
the volcano could yesterday be observed. This phenomenon later was followed
by a tremor episode and a moderate explosion that generated a steam column
of water and ash, the exit of incandescent blocks and a strong cannon shot.
With respect to activities, none have been reported. The state of the volcano
indicates that the presence of the tremor registered during the night of
yesterday, is related to a hydrothermal system, in which the gases and
their passage through rock fractures generate a resonance that is registered
in form of harmonic tremor. In September of year, a tremor of the same
characteristics appeared, during a period of greater time, and than it
was followed of an important explosive activity. It is thus, that in this
case we could suggest the volcanic system still maintains a certain heat
level that would allow him to generate new periods of greater explosividad
to the one than it has been seen during these last weeks. It is recommended
to maintain Alert Level Orange The colour of the volcanic alarm light continues
at the ORANGE for volcano Tungurahua.