The San Miguel Volcano (Volcán Chaparrastique) exploded violently on June 18, 2016 at 4:10am local time.
This new explosion covered the surrounding area with dust and was preceded by a sharp increase in seismic activity.
It’s been a long time that the activity of Volcán Chaparrastique is stable and constant. But on June 18, 2016, a new seismic crisis triggered a strong explosion at 4:10 am:
End of May 2016, seismograms started recording a very significant increase in tremors, most probably related to fluid circulation within the giant. The activity gradually declined until June 13 where again, 400 tremors were recorded and 500 the day after and another 500 on June 15.
This succession of seismicity peaks in June was accompanied by an increase in the amount of SO2 in the plume degassing.
Moreover, volcanologists discovered a slight deformation of inflation deviation (swelling) located on the north side.
Ash has been reported in villages around the volcano.
Important degassing is still observed from the crater forming a plume about 400m high, only made of gas.
The last eruption of the San Miguel volcano occurred on December 29, 2013. It prompted the evacuation of thousands of people living in a 3 km radius around the volcano and was also preceded by increased seismic activity.