Mount Asama, a volcano on the border of Japan’s Gunma and Nagano prefectures has erupted On April 2, 2017. People in the vicinity immediately took to Twitter to share impressive pictures of the raging coloseus that hadn’t explosed since 2009. Asamayama (also known as Asama and Azumayama) has been relatively quiet since an eruption during January-February 2009.Based on JMA monthly reports,

there was no exceptional activity during 2011-2013. However, during 2014, the frequency of shallow volcanic earthquakes and tremors occurring immediately under the summit crater began to increase. In late April 2015, volcanic seismicity further increased. READ MORE