Three basaltic pyroclastic flows were generated during the 3.2-ka, 2.9-ka, and 2.5-ka eruptions of Fuji volcano. These pyroclastic flows came down the west to southwest slopes, and generated lahar fans at the foot of the volcano. The ages of the pyroclastic flows correspond to the stage of explosive summit eruptions. Also, the pyroclastic flows only occurred at the steep summit slopes that exceed 34 degree in angle. So, the pyroclastic flows presumably resulted from avalanching of voluminous pyroclastic materials accumulated on the steeper slopes than the angle of repose.
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| Distribution of the pyroclastic flow deposits in the SW foot of Fuji volcano |
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| Relational Information |
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AIST Today Vol. 2, No. 8 (2002) 17
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No.6 Autumn 2002
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