The AVO detected a gradual increase in activity at Bogoslof on January 17, starting at 13:22 UTC and continuing until an increase of the tremor at 14:48 UTC.
Minor explosions were observed around 3:00 pm and 4:40 pm UTC, before a decline in seismicity.
The ash cloud has risen to a maximum of 4,500-4600 meters and the aviation code remains at Orange.
In Mexico, a strong explosion shook the Colima on January 18 at 0:27, projecting incandescent fragments on all sides of the volcano, and accompanied by a plume rising to more than 4,000 meters.
Falls of ash are reported in the northern area of Comala.
Sources: Colima Volcano and webcamsMexico
What's going on in Zhupanovsky?
The Kamchatka Volcano Nature Park features two powerful plumes above the volcano and recommends travelers and tour operators to avoid the area. In the event of an eruption, gas concentrations could exceed the maximum allowed, and ash falls would be possible.
KVERT did not comment at this time on a possible volcanic activity.