Activity of the Volcano:
Observed Semeru on the 16-17th September from the Tengger Caldera, +/- 20km North of the volcano.
Semeru seem to erupt small grey ash clouds, that were drifting West every 30min. No other relevant observations was made.
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Total photos in this article: 6 (Available in Jpg/Raw.). (50+ photos not published)
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17th September