Seismic activity has increased at Kaba volcano, Sumatra, Indonesia. On 19th October 2009, 127 shallow volcanic earthquakes were recorded. Continuous tremor occurred on 19th October between 06:40-09:00 hr, and 20th October between 03:00 to 09:00 hr. Visual observations showed thin white emissions rising 50 m above the crater. Ground deformation has been measured across the volcano. Water temperature measurements of the craters on 15th October was 72 deg C, with a degree of acidity (pH) 3.2. Solfatara temperatures range from 106 to 107 deg C. A one kilometre exclusion zone has been placed around the crater. On 20th October the volcano was raised to alert level 2.
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