Santa Maria volcano (Guatemala) - Smithsonian / USGS Weekly Volcanic Activity Report for 9 December-15 December 2020 (Continuing Activity)
INSIVUMEH reported that during 9-15 December explosions at Santa María's Santiaguito lava-dome complex generated ash plumes that rose as high as 900 m above the complex. The extrusion of blocky lava at the WSW part of Caliente dome generated block-and-ash flows that descended the NW, WSW, SW, and E flanks often reaching the base of the complex. The activity increased at 0430 on 11 December with notable avalanches of material and block-and-ash flows lava dome traveling down the W and SW flanks.
Wed, 9 Dec 2020, 06:0006:00 AM | BY: VN
Ash plumes drifted 15 km SW, causing ashfall in areas downwind including Finca Montebello, Loma Linda, and San Marcos Palajunoj. Activity remained elevated at least through 13 December; ash plumes drifted as far as 20 km W, SW, and S, and pyroclastic flows descended the flanks.
Source: Instituto Nacional de Sismologia, Vulcanologia, Meteorologia, e Hidrologia (INSIVUMEH)
From: Global Volcanism Program, 2020. Report on Santa Maria. In: Mayberry, G (ed.), Weekly Volcanic Activity Report 9 December-15 December 2020. Smithsonian Institution and US Geological Survey.
Fri, 20 Nov 2020, 16:45
Wed, 18 Nov 2020, 06:00
Santa Maria volcano (Guatemala) - Smithsonian / USGS Weekly Volcanic Activity Report for 18 November-24 November 2020 (Continuing Activity)
INSIVUMEH reported that explosions at Santa María's Santiaguito lava-dome complex generated ash plumes that rose 1.1 km above the complex and caused ashfall in areas SW and E, based on El Observatorio Vulcanológico del Complejo Volcánico Santa María-Santiaguito (OVSAN) observations. Weak pyroclastic flows descended the W flank of Caliente cone. ... Read all