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Fuego volcano (Guatemala) - Smithsonian / USGS Weekly Volcanic Activity Report for 16 August-22 August 2017 (Continuing Activity)

mer., 16 août 2017, 06:00
06:00 AM | AUTEUR : VN
INSIVUMEH reported that the eighth effusive episode at Fuego in 2017 began on 20 August. Constant explosions generated ash plumes that rose 2.3 km above the crater and drifted more than 50 km W and SW. Ashfall was reported in areas downwind including Panimaché I (8 km SW), Morelia (9 km SW), Santa Sofía (12 km SW), El Porvenir (8 km ENE), Sangre de Cristo (8 km WSW), and Yepocapa (8 km WNW).
Two lava fountains, each 300 m high, fed lava flows that traveled 1.4 km SSW down the Ceniza ravine and 1.2 km W down the Seca (Santa Teresa) ravine. Incandescent block avalanches occurred throughout the crater. Some explosions generated shock waves that rattled nearby structures.
Seismicity decreased on 21 August. Weak explosions generated ash plumes that rose 1 km and drifted 20 km. Suspended ash from explosions and pyroclastic flows was visible.
The lava flows had lengthened 200 m in the Ceniza ravine and 100 m in the Santa Teresa ravine. The report warned that pyroclastic flows were concentrated in the Santa Teresa ravine, possibly filling the drainage with deposits (similar to activity from 5 May) and increasing the chances for lahars. Ash fell in San Pedro Yepocapa (8 km N) and Chimaltenango (21 km NNE).
On 22 August INSIVUMEH noted that after 48 hours the effusive episode was over. Explosions produced ash plumes that rose 1.2 km and drifted SW, and continued to vibrate nearby structures. Incandescent material was ejected as high as 200 m above the crater rim.

Source: Instituto Nacional de Sismologia, Vulcanologia, Meteorologia, e Hidrologia (INSIVUMEH)
From: Global Volcanism Program, 2017. Report on Fuego. In: Mayberry, G (ed.), Weekly Volcanic Activity Report 16 August-22 August 2017. Smithsonian Institution and US Geological Survey.

Actualités précédentes

mer., 9 août 2017, 06:00
CONRED reported that during 8-9 August the lava flow that had descended Fuego's Ceniza (SSW) drainage was still active, producing avalanches of material and emissions. Explosions generated ash plumes that rose 650 m above the crater. According to INSIVUMEH ash plumes from explosions during 11-12 and 14-15 August rose 650-850 m and drifted 7-8 km W and SW. ... Read all
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