An unconfirmed eruption was reported in Bolivia in December 1989 and fumarolic activity in the crater was reported on 25 March 1990.
32.
Fumarolic activity has formed ice towers that emit steam, making it the only volcano in Marie Byrd Land with ongoing geothermal activity.
33.
The volcano hosts some of the Andes'largest thermal anomalies in satellite images and increased fumarolic activity in 2002 2003 was reported.
34.
The unforested summit crater and weak fumarolic activity suggests that the most recent eruption may have been only a few hundred years ago.
35.
After this discovery, they began to regularly check the fumarolic activity and monitor the volcano for dramatic changes, but none were observed.
36.
The eruption was characterised by lava emissions from fissures that opened up on the volcano's southwestern flank, and by fumarolic activity.
37.
There are reports of fumarolic activity, and de Silva and Francis ( 1991 ) considered that the volcano was last active in the Holocene.
38.
An alternating cycle of fumarolic activity, an accumulation of fumarolic gases in the conduit and lava dome, plume that reaches an altitude of.
39.
Late-stage volcanism produced youthful basaltic lava flows on the floor of the summit depression, which is also the site of prominent fumarolic activity.
40.
A young crater lies on the northeast flank of the central summit cone, and is the site of vigorous superheated fumarolic activity with prominent sulfur deposits.
