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Volcano Activity in Colombia on Thursday, 09 August, 2012 at 07:46 (07:46 AM) UTC.
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The recent increase in seismic activity under Sotarà volcano promted INGEOMINAS to raise the alert level from yellow (unrest) to orange (eruption warning) yesterday afternoon. The increase had been detected on June 24, 2012 and since that date, 6891 earthquakes have been recorded, i.e. an average of 150 quakes per day. Most of them (5177) are of very small magnitude, but the remaining 1714 quakes were of significant energy (local magnitudes 0.1-2.2) and concentrated in an area between 0.1 and 5 km northeast of the volcanic summit at depths between 2 and 6 km. None of these events were felt by inhabitants of the communities surrounding the volcano Sotará. The deformation network shows a possible inflation process towards the northeast sector of the volcano, which correlates with the epicentral zone of seismicity reported and suggest that magma is rising there, and might (or might not) lead to an eruption in a near to medium future. During the month of July geochemical surveys showed no significant changes in temperatures of hot springs in the area. INGEOMINAS stresses that this activity does not pose any immediate danger to the communities aroud the volcano. However, it should be said as well that this could change quickly.
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