Santiaguito volcano (Guatemala): actively growing lava dome
Mon, 21 Sep 2020, 07:3707:37 AM | BY: MARTIN
The activity of the volcano has remained essentially unchanged at elevated levels during the previous months characterized by pyroclastic flows and new period of extrusion of the dome blocks.
Pyroclastic flow and phoenix cloud from Santiaguito volcano on 15 September (image: INSIVUMEH)
INSIVUMEH reported that extrusion of the dome blocks is appeared reaching over the edge of the crater of the Caliente dome and causes block-and-ash flows that continue to descend over the western and southwestern slopes, sometimes phoenix clouds are formed. The length of the flows is about 800 m. Accumulating of the volcanic material in the lower part and on the west and southwest flank of the Caliente dome can lead to formation of lava flows or moderate to strong lahars (mud flows) towards the San Isidro river channel.
A weak to moderate explosions at regular intervals of 15 to 20 per day are generated which reached approx. 9,842 ft-10,826 ft (3,000-3,300 m) altitude and extending about 10-12 km of the volcano.
Lahars (mud flows) continue to be observed due to heavy rainfalls that remobilise the fresh ash deposits.
Source: Instituto Nacional de Sismología, Vulcanología, Meteorología e Hidrología volcano activity update 21 September 2020
Wed, 26 Aug 2020, 06:00
Santa Maria volcano (Guatemala) - Smithsonian / USGS Weekly Volcanic Activity Report for 26 August-1 September 2020 (Continuing Activity)
INSIVUMEH reported that during 26 August-1 September explosions at Santa María's Santiaguito lava-dome complex generated ash plumes that rose as high as 1 km above the crater and drifted as far as 1 km W and SW. Block avalanches descended multiple flanks of Caliente cone; some reached the base of the cone and were sometimes accompanied by small pyroclastic flows. The lava dome was incandescent most nights, sometimes for prolonged periods of time. ... Read all
Sun, 23 Aug 2020, 18:10
INSIVUMEH reported that incandescence avalanches continue to be observed in the Caliente dome and caused avalanches of material in S-SE-SW direction that reached the base of the dome. ... Read all