Since October – December 14, 2011 increased volcanic activity G. Ijen volcanic activity is characterized by an increase in both visually, the amount per month Volcanic Earthquake In (VA), Shallow volcanic (VB) and the Earthquake Tremor shots. From 5 – December 14, 2011 increased volcanic activity was followed also by indicating the Harmonic Tremor Earthquake activity beneath the surface near the crater lake has intensified. In the period 15 – December 17, 2011 there has been a significant increase in…