FUEGO Guatemala 14.473°N, 90.880°W; summit elev. 3763 mINSIVUMEH reported that during 22-23 May explosions from Fuego produced ash plumes that rose 700 m above the crater and drifted W and SW. Explosions produced shock waves and rumbling noises, and avalanches descended the SW flank towards the Ceniza drainage. Seismic data suggested that on 25 May lava was emitted in the crater, although lava flows were not observed the previous few days. Plumes rose 2 km above the crater and drifted SE, SW, and W. Ashfall was reported in Sangre de Cristo (8 km WSW), Yepocapa (8 km WNW), and in the department of Chimaltenango (21 km NNE). A pyroclastic flow traveled SW down the Las Lajas drainage. During 26-29 May explosions produced ash plumes that rose as high as 1 km above the crater and drifted N, NE, S, and SE. A lava flow traveled 200 m SW and avalanches from the lava-flow front traveled 300 m during 26-27 May. Pulses of incandescence 100 m high were observed during 28-29 May. Map.
GALUNGGUNG Western Java (Indonesia) 7.25°S, 108.058°E; summit elev. 2168 mCVGHM reported that, since the Alert Level was raised on 12 February, seismic activity at Galunggung had drastically decreased through 27 May. During 27 April-27 May plants around the crater area looked green and lush, small fish were swimming in the water, and insects around the crater were active. Based on seismic data, crater lake water temperature and pH data, and visual observations, CVGHM lowered the Alert Level from 2 to 1 (on a scale of 1-4) on 28 May. Map.
NEVADO DEL RUIZ Colombia 4.895°N, 75.322°W; summit elev. 5321 mAccording to INGEOMINAS, the Observatorio Vulcanológico and Sismológico de Manizales reported that on 22 May a seismic signal possibly indicated an ash emission from Nevado del Ruiz, though it was not confirmed due to poor weather conditions. On 29 May activity significantly increased; at 0307 seismic signals indicated ash emissions that were confirmed by officials and residents near the volcano as well as with a web camera. The Alert Level was raised to II (Orange; "eruption likely within days or weeks"). A gas-and-ash plume rose 1 km above the crater and ashfall was reported in Anserma (65 km NW), Aranzazu (45 km NNW), Chinchiná (30 km WNW), Dosquebradas (40 km W), Filadelfia, La Merced (60 km NNW), Manizales (30 km NW), Marmato (70 km NNW), Neira (37 km NW), Palestina (40 km WNW), Pereira (40 km WSW), Risaralda (78 km WNW), Salamina (60 km NNW), San José (56 km NW), Santagueda (40 km NW), Santa Rosa de Cabal (33 km W), Supia (72 km NNW), Villamaria (28 km NW), and Viterbo (65 km WNW). Ash also fell in all municipalities in the department of Risaralda (76 km WNW) and El Aguila (85 km W, N of Valle del Cauca). Sulfur dioxide plumes were detected by satellite and a sulfur dioxide odor was reported in multiple towns. Later that day ash emissions rose 600 m above the crater. Map.
SIRUNG Pantar Island (Indonesia) 8.508°S, 124.13°E; summit elev. 862 mCVGHM reported that during 13-18 May diffuse white plumes from Sirung rose 10-50 m above the crater. Seismicity was elevated during 12-17 May then decreased through 23 May, although levels remained above background. On 25 May the Alert Level was lowered to 2 (on a scale of 1-4). Map.
SOPUTAN Sulawesi 1.108°N, 124.73°E; summit elev. 1784 mCVGHM reported that observers in the village of Maliku noted that during 21-27 May white plumes rose 50-150 m above the crater of Soputan. Seismicity increased significantly on 25 May. CVGHM raised the Alert Level to 3 (on a scale of 1-4) on 28 May based on visual observations and increased seismicity. Map.
For the complete list of ongoing volcanic activity and additional geological summary, click HERE or select the specific volcano name below for additional details:
ONGOING ACTIVITY: Bagana, Bougainville | Cleveland, Chuginadak Island | Dukono, Halmahera | Karymsky, Eastern Kamchatka (Russia) | Kilauea, Hawaii (USA) | Popocatépetl, México | Sakura-jima, Kyushu | Sangay, Ecuador | Santa María, Guatemala | Shiveluch, Central Kamchatka (Russia) | Tungurahua, Ecuador