Volcanos

Roundup of Global Volcanic Activity - New Activity for the week of 12 July - 18 July 2017

Bogoslof | Fox Islands (USA) : AVO reported that during 12-18 July no significant activity at Bogoslof was observed in cloudy or mostly cloudy satellite images; weakly elevated surface temperatures were noted on 12 and 16 July. In addition no activity was detected in seismic, infrasound, or lightning data. The Aviation colour Code remained at Orange and the Volcano Alert Level remained at Watch.

Fuego | Guatemala : INSIVUMEH reported that multiple explosions at Fuego during 13-14 July generated ash plumes that rose as high as 950 m above the crater and drifted 8-10 km NW and W. Incandescent material was ejected 100 m above the crater rim, and caused avalanches of material that traveled down the Ceniza (SSW), Taniluyá (SW), and Trinidad (S) drainages. On 16 July a 30-m-wide, 2-m-deep, hot lahar descended tributaries of the Pantaleón (W) drainage, carrying blocks more than 2 m in diameter, branches, and tree trunks. The lahars again overtook the road between communities on the SW flank, isolating the village of Sangre de Cristo (8 km WSW) and the Palo Verde estate. Vulcanian explosions during 17-18 July produced dense ash plumes that rose almost 1 km above the crater rim and drifted 15 km W and NW. Ash fell in Panimache (8 km SW), Morelia (9 km SW), and Santa Sofía (12 km SW).

Sangeang Api | Indonesia : PVMBG reported a small eruption at Sangeang Api at 1154 on 15 July characterized by Strombolian activity, and an ash plume that rose 100-200 m above the crater rim and drifted SW. Prior to the event, thermal anomalies had increased beginning in March, and seismicity had increased starting in April. Based on analyses of satellite imagery, PVMBG observations, and wind data, the Darwin VAAC reported that on 16 July an ash plume rose to an altitude of 2.1 km (7,000 ft) a.s.l., or 200 m above the crater rim, and drifted NW.