so far no casualties being reported yet. People around My. Semeru actually already being warned to prepare evacuation on the last couple of days. However Mt. Semeru it self is a very active vulcanic mountain. Last eruption just happen last year, and people around it already used seeing the mountain have small scale eruption from time to time.
Problem now asside pyroclastic cloud threat, it's also combine with heavy rain (it's rainy season now in Java). This combination can provide flood from all materials being erupted (cold lahar/lava flood).
The local government now focus on evacuation of two subdistrict around the base of the mountain.
Yeah just like you put. Just another joy living in ring of fire area. The area around Mt Semeru located with chain of vulcanic mountain. This make the area, a very fertile agriculture land.