Actualités et mises à jour sur volcans et séismes

BPPTKG reported that the eruption at Merapi continued during 24-30 June. The heights and morphologies of the SW and central lava domes were unchanged from the previous week, and seismicity remained at high levels. As many as 69 lava avalanches traveled down the Bebeng drainage on the SW flank, reaching a maximum distance of 1.8 km. ... Read all

PVMBG reported that the eruption at Lewotolok continued during 28 June-5 July. Daily white-and-gray or white, gray, and black emissions rose as high as 1.3 km above the summit and drifted NW, W, and SW. Photos posted in reports showed Strombolian activity from the crater. ... Read all

PVMBG reported that several eruptive events were recorded at Anak Krakatau during 29 June-1 July. Gray-to-black ash plumes of variable densities rose as high as 2 km above the summit and drifted N and NE. Cloudy weather conditions sometimes prevented views during 2-5 July, though photos posted with the reports showed nighttime crater incandescence. ... Read all

HVO reported that lava continued to effuse from a vent in the lower W wall of Kilauea's Halema`uma`u Crater during 29 June-5 July, entering the lava lake and flowing onto the crater floor. The lake level was variable, and lava breakouts occurred along the N margin on most days. The Aviation Color Code and the Volcano Alert Level remained at Orange and Watch, respectively. ... Read all

AVO reported that on 30 June strong winds in the vicinity of Katmai and the Valley of Ten Thousand Smokes blew unconsolidated ash NW at an altitude up to 1.8 km (6,000 ft) a.s.l. The ash was originally deposited during the Novarupta eruption in 1912. The Volcano Alert Level remained at Normal and the Aviation Color Code remained at Green. ... Read all

KVERT reported that a thermal anomaly over Karymsky was identified in satellite images during 24 and 27-30 June. The Aviation Color Code remained at Orange (the second highest level on a four-color scale). Dates are based on UTC times; specific events are in local time where noted. ... Read all

PHIVOLCS issued a special notice for Kanlaon at 1400 on 3 July, noting increased earthquake activity beneath the summit. A total of 41 volcanic earthquakes were recorded by the seismic network beginning at 0500 on 30 June, including seven shallow tornillo signals indicating gas movement through fractures in the upper flanks. Ground deformation data from continuous GPS indicated minor, short-term inflation of the lower and mid-flanks of the volcano since January 2022, consistent with continuous electronic tilt data that had recorded inflation on the SE flanks since mid-March 2022. ... Read all

AVO reported that the eruption at Great Sitkin continued during 29 June-5 July. The lava-flow field grew slightly, expanding 15 m E. Elevated surface temperatures were occasionally identified in satellite images; weather clouds sometimes obscured satellite and webcam views. ... Read all

PVMBG reported that diffuse white plumes rose 20-60 m above Gamkonora's summit were visible during 1 January-29 June, and no other changes were observed. Deep and shallow volcanic earthquakes were rarely recorded. On 30 June the Alert Level was lowered to 1 (on a scale of 1-4). ... Read all

INSIVUMEH reported that 4-10 explosions per hour were recorded at Fuego during 28 June-5 July, generating ash plumes that rose as high as 1.2 km above the crater rim. The ash plumes drifted 10-30 km W and SW, causing daily ashfall in areas downwind including Morelia (9 km SW), Panimaché I and II (8 km SW), Santa Sofía (12 km SW), El Porvenir (8 km ENE), Los Yucales (12 km SW), Sangre de Cristo (8 km WSW), and Finca Palo Verde. Daily shock waves rattled structures in communities around the volcano and occasional rumbling was heard. ... Read all