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Figure 2.

View of from crater rim of Mount Yasur Volcano. (A) From the rim, only three vents are visible. (B) From a micro-UAV image taken directly over the crater, six vents (1–6) are apparent (vents 1–3 correlate with the same numbered vents in [A]). It is also possible to see that vent 2 is obstructed.

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