no news in this list. Kusatsu-Shirane volcanoKusatsu-Shirane
volcano is a complex of overlapping cones and 3 lake-filled
craters (Karagama, Yugama, Mizugama) at the summit. It is
located 150 km NW of Tokyo. All historical eruptions have
consisted of phreatic explosions from the acidic crater lakes or
their margins. There are fumaroles and hot springs around the
flanks of the volcano, and many rivers draining from the volcano
are acid. Similar to Ijen volcano, the crater was the site of
active sulfur mining for many years during the 19th and 20th
centuries. Background:The andesitic-to-dacitic volcano was
formed in 3 eruptive stages beginning in the early to mid
Pleistocene. The Pleistocene Oshi pyroclastic flow produced
extensive welded tuffs and non-welded pumice that covers much of
the east, south and SW flanks. The latest eruptive stage began
about 14,000 years ago. Yugama crater ("hot-water cauldron")
contains the most active vent. Its lake is 270 m wide and up to
27 m deep and contains highly acidic (pH =