Kuchinoerabu-jima (Ryukyu Islands): A new eruption occurred yesterday at the volcano at 12h25 local time. It consisted of a single powerful explosion from the Shin-Dake crater. An ash plume rose to approx 1.5 km height, and a pyroclastic flow was generated.
The eruption lasted about 10 minutes and much of the erupted mass collapsed into an impressive pyroclastic flow (hot avalanche of fragmented lava and gasses).
There are no reports of victims or damage. Japanese volcanologists raised the alert level to 3 and closed access to the summit area.
The volcano had last had erupted in 1980, 1976, 1974 and 1973. All its recent eruptions were short lived.
Tungurahua (Ecuador): Activity continued to increase at the volcano as new magma continues to arrive at its summit. Since the first ash emission a week ago, more and stronger explosions, as well as phases of continuous ash and gas emissions and milder strombolian activity have occurred.
Ash plumes have been rising up to 4 km above the volcano’s summit and moderate ash fall occurred in several areas, most notably the sectors of Choglontús, El Manzano, Motilones, Cusúa, Tisaleo and Mocha.
During the night 2-3 August, activity had been lower, but with more frequent strombolian explosions ejecting incandescent material to up to 700-1000 m above the crater and causing avalanches on the upper slopes.
Following this Strombolian phase, 4 explosions of small to moderate size were recorded, which occurred at 00h06, 00h22, 00h39 and 00h42 local time yesterday morning. These rattled windows in nearby villages.
Sabancaya (Peru): A pilot reported a volcanic ash plume to approx. 17,000 ft yesterday afternoon, which would infer that the volcano, which has been showing seismic unrest for a while, actually erupted. There are no other indications of an eruption and the ash plume was most likely a weather cloud.
Peru’s geophysical institute reported in its latest summary on 1 Aug, that seismic activity continued at the volcano, but had decreased and mostly is tectonic in nature and lacks signature of magma moving (such as hybrid quakes). No thermal anomalies were detected at the volcano.
Only a degassing steam and gas plume show that the volcano is not completely calm.