While the recent eruptions started in December 2018, the latest started this past month with new flank eruption, the first in 11 years. This eruption was accompanied by an earthquake and it prompted authorities to raise the Aviation Color Code to Red.
The seismic activity increased to 130 tremors in the first three hours and rather large quakes that rocked local towns and cities. The largest was and M4.0 that was located 2.0 kilometers underground and triggered a series of plumes of smoke, ash and gases that rose several kilometers above the volcano, hindering air traffic and causing thousands to flee local towns.
There are new craters on the NE side of the mountain that are spewing gas and ash with ash rising 5.5m above sea level or 18,000 feet. This would mean that the ash is approaching levels that commercial airliners sometimes travel, about 25,000 feet. More on this story in the coming weeks.