Galeras volcano activity summary 18 - 25 September 2012
Wednesday Sep 26, 2012 11:26 AM | BY: T
Seismicity associated with fluid motion in volcanic conduits continued at low levels. Sometimes this seismicity is associated with gas and ash emissions. At dawn on September 25, a swarm of earthquakes occurred related to fracturing of crustal material, with low energy events, located about 2 km west of the active crater, with depths close to 3 km above the top and magnitudes below 1 in the Richter scale.
Using cameras installed on different flanks of the volcano, with the exception of September 23, during the week, weather conditions allowed to observe gas emissions, mainly water vapor. On 18 and 24, some ash content could be seen in the emitted gas column.
Values of Sulphur Dioxide flow remained fluctuating between low and moderate.
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Tuesday, Sep 25, 2012
Weak seismic activity with some quakes and long-period events continue to be registered. [more]
Wednesday, Sep 19, 2012
Weak tremor pulses and small earthquakes occur at the volcano and some of these events are accompanied by gas and steam emissions sometimes containing some ash, as observed on 12, 14 and 18 Sep. SO2 emission is a low to intermediate levels. [more]
Saturday, Sep 08, 2012
Very small earthquakes are visible on recent seismograms. [more]
Wednesday, Sep 05, 2012
Weak seismic activity above background levels is reported from Galeras. Steaming and degassing could be observed during clear weather on 30 August. [more]
Saturday, Sep 01, 2012
A felt magnitude 2.7 earthquake occurred on 29 Aug at 09:05:07 at 7.5 km depth 12.6 km from the main crater of Galeras or at 10.7 km north of the town San Juan de Pasto. [more]
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