Ubinas, Peru

Based on SIGMET reports, the Buenos Aires VAAC reported that ash plumes from Ubinas rose to altitudes of 5.5-5.8 km (18,000-19,000 ft) a.s.l. on 23 July and drifted SE.
Sources: Buenos Aires Volcanic Ash Advisory Center (VAAC) – “Reports provided courtesy of the Smithsonian’s Global Volcanism Program and the US Geological Survey’s Volcano Hazards Program.”

Tungurahua, Ecuador

The IG reported that during 22-23 July, explosions from Tungurahua were detected by the seismic network. An ash plume rose to an altitude of 9 km (29,500 ft) a.s.l. On 25 July, lahars descended two drainages on the W flank. On 26 July, ash-and-steam plumes drifted NW and SW, and explosions and roaring noises were [...]

Suwanose-Jima, Ryukyu Islands, Japan

Based on pilot reports, the Tokyo VAAC reported that on 30 July an ash plume from Suwanose-jima rose to an altitude of 0.6 km (2,000 ft) a.s.l. and drifted S.
Source: Tokyo Volcanic Ash Advisory Center (VAAC) – “Reports provided courtesy of the Smithsonian’s Global Volcanism Program and the US Geological Survey’s Volcano Hazards Program.”

Semeru, Eastern Java, Indonesia

The Darwin VAAC reported that on 27 July an ash plume at an altitude of 4.3 km (14,000 ft) a.s.l. was spotted by a pilot in the vicinity of Semeru. Ash was not identified on satellite imagery.
Source: Darwin Volcanic Ash Advisory Centre (VAAC) – “Reports provided courtesy of the Smithsonian’s Global Volcanism Program and the [...]

Santa María, Guatemala

INSIVUMEH reported that on 22 July seismic stations monitoring Santa María’s Santiaguito lava dome complex detected a lahar below the S flank in the Nima I river. Explosions observed on 23, 28, and 29 July from Caliente cone produced ash plumes that rose to altitudes of 2.8-3.3 km (9,200-10,800 ft) a.s.l. and drifted SW and [...]

Sakura-Jima, Japan

Based on information from JMA, the Tokyo VAAC reported that during 25-28 July ash plumes from Sakura-jima rose to altitudes of 2.4-4.3 km (8,000-14,000 ft) a.s.l. and drifted N, NE, and S.
Source: Tokyo Volcanic Ash Advisory Center (VAAC) – “Reports provided courtesy of the Smithsonian’s Global Volcanism Program and the US Geological Survey’s Volcano Hazards [...]

Rabaul, Papua New Guinea

Based on observations of satellite imagery and information from RVO, the Darwin VAAC reported that during 23-24 and 26-29 July ash plumes from Rabaul caldera’s Tavurvur cone rose to altitudes of 1.5-3 km (5,000-10,000 ft) a.s.l. and drifted W and NW.
Sources: Darwin Volcanic Ash Advisory Center (VAAC) – “Reports provided courtesy of the Smithsonian’s Global [...]

Krakatau, Indonesia

Based on observations of satellite imagery, the Darwin VAAC reported that ash plumes from Anak Krakatau rose to an altitude of 3 km (10,000 ft) a.s.l. on 27 July and drifted NW. A meteorological cloud obscured satellite views the next day but the VAAC warned that ash may still be present in the area.
Source: Darwin [...]

Kilauea, Hawaii, USA

Based on visual observations from HVO geologists, video footage, and web camera views, HVO reported that during 23-29 July, lava flowed SE through a lava tube system from underneath Kilauea’s Thanksgiving Eve Breakout (TEB) and rootless shield complex to the Waikupanaha ocean entry. A bench collapse at the ocean entry occurred on 22 July. Pu’u [...]

Bezymianny, Kamchatka, Russia

KVERT reported that seismic activity at Bezymianny was above background levels on 20 July and at background levels the other days during 18-25 July. Fumarolic activity was observed during 18-22 July and area volcanologists reported that the lava dome continued to grow. Weak thermal anomalies over the lava dome were detected in satellite imagery on [...]