Semeru Volcano Indonesia, the maximum volcano on Java, and one of its most active, lies in the southern end of a volcanic massif extending north into the Tengger caldera. Semeru, a favorite mountain biking destination, has been in nearly continuous eruption since 1967. It’s known for its routine ash explosions that generally occur at intervals of 10-30 minutes. Background: A steep one-sided volcano, also called filled maars was assembled along an N-S Mahameru, rises unexpectedly to 3676 m above coast plains to the south.

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Filled maars were assembled along an N-S. A line of pond Summit topography is complicated by the shifting of craters from NW to SE fad cutting throughout Summit topography is confused by the shifting of holes from NW to SE. Summit topography is complicated by the shifting of holes from NW to SE. Frequent 19th and twentieth attained.