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Earth of fire

Actualité volcanique, Articles de fond sur étude de volcan, tectonique, récits et photos de voyage

Publié le par Bernard Duyck
Publié dans : #volcanic activity
Sakurajima - 04.24.2020 / 2:33 p.m. - Beginning of explosion and direction of the ash plume - Doc. JMA

Sakurajima - 04.24.2020 / 2:33 p.m. - Beginning of explosion and direction of the ash plume - Doc. JMA

At Sakurajima, an explosion took place on April 24 at 2:32 p.m. It was accompanied by a plume of ash and gas, the 155 ° of the year, rising to 2,100 meters above the Minamidake crater, with a dispersion towards the south-east.

The JMA reports a dispersion of large volcanic rocks towards the 6th station, 800-1.100 meters from the Minamidake crater.

 

Source: JMA

Merapi - the summit dome on 04.24.2020 / 12:42 p.m. loc. - photo Volcano YT

Merapi - the summit dome on 04.24.2020 / 12:42 p.m. loc. - photo Volcano YT

For the Merapi, on Java, the weekly report of the BPPTKG from April 17 to 23 indicates a currently stable dome.

The potential danger remains in the form of hot clouds from the collapse of the lava dome and bursts of volcanic material due to explosive eruptions. ⁣

 

The seismicity of April 23 is characterized by 2 avalanche earthquakes, 2 blast earthquakes and 8 hybrid earthquakes.

The latter remain present, although decreasing in number, over the past week.

Gas emissions are noted at a height of 50 meters above the summit.

The activity level remains at 2 / waspada, with a prohibited area of ​​3 km radius around the crater.

 

Source: BPPTKG

Merapi - activity from 23.04.2020 / 00h- 24h - Doc.BPPTKG

Merapi - activity from 23.04.2020 / 00h- 24h - Doc.BPPTKG

Activity of the past week at Mauna Loa, in volcanic alert level Advisory and aviaition code Yellow.

The volcano is not erupting.

Over the past week, HVO seismometers have recorded 78 small-scale earthquakes on the summit of the volcano and its elevation flanks. Most of these earthquakes occurred at shallow depths less than 8 km (~ 5 miles) below ground level. The largest earthquake was magnitude 2.3 under the southern caldera.

Global positioning system (GPS) measurements show continued slow top inflation, consistent with magma supply from the volcano's shallow storage system.

 

Mauna Loa - Deformation / summit tilt.  between 24.03 and 23.04.2020 - Doc. HVO / USGS


Gas concentrations at the Sulfur cone monitoring site in the southwest rift zone remain stable. The temperatures of the fumaroles measured both at the sulfur cone and at the top did not change significantly.

 

Source: Hawaii volcano Observatory / USGS

Villarica - summit crater - photo Franco Vera / Volcanologia in Chile - archives 27.03.2019

Villarica - summit crater - photo Franco Vera / Volcanologia in Chile - archives 27.03.2019

In Chile, the Villarica shows low energy seismic parameters. However, surface activity persisted, with minor explosions, and an oscillating level of the lava lake.

The technical alert level remains at Amarilla.

 

Source: Sernageomin

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