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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

The SGC reports an emission of ash from the Nevado del Ruiz volcano.
At 5:13 p.m. on April 11, 2022, a seismic fluid signal was recorded with an associated ash emission. The column of steam, gas and ash reached a height of 3258 m, vertical direction with a slight dispersion towards the north. This was visible from most cameras installed in the volcano area and from the city of Manizales. At the time of publication of this note, there is a report of ash fall in the area of ​​the volcano, according to what was notified by the staff of the National Natural Park of Los Nevados.

Nevado del Ruiz- ash plume and gas 11.04.2022 - SGC webcams - oneclick to enlarge

Nevado del Ruiz- ash plume and gas 11.04.2022 - SGC webcams - oneclick to enlarge

It is emphasized that the phenomenon observed this afternoon is a recurring phenomenon in the activity of the volcano, which on many occasions is not possible to observe due to the climatic conditions which commonly prevail in the region.

The recording of new seismic signals of this type that may be associated with gas and ash emissions, which will be dispersed according to the prevailing wind regime at the time of the emission or an acceleration of the volcanic process that this entails, is not excluded. changes in the activity level of the volcano.

The activity level of the Nevado del Ruiz volcano remains at 3 / yellow: Changes in the behavior of volcanic activity. The Colombian Geological Service remains attentive to any development in the activity and invites you to consult the official information that will be issued by the Colombian Geological Service and the municipal and departmental risk management councils.

 

Source: S.G.C.

Sabancaya - activity from 4 to 10.04.2022 - doc. I.G.Peru

Sabancaya - activity from 4 to 10.04.2022 - doc. I.G.Peru

Between April 4 and 10, 2022, Sabancaya maintained moderate eruptive activity, with an average of 52 daily explosions, accompanied by plumes of ash and gas 2,500 meters above the summit.

During the period, the I.G.P. detected 231 earthquakes of volcanic origin associated with the circulation of internal magmatic fluids, as well as VT earthquakes, related to rock fragmentation. No significant anomalies were reported. Three thermal anomalies, max. 6 MW, have been identified, associated with the presence of a superficial lava body in the crater.

The volcanic alert remains at naranja, with a non-accessible zone of 12 km radius around the crater.

 

Source: I.G.Peru

Kilauea , cratère Halema'uma'u : One eruptive vent (orange) is active within Halema‘uma‘u, on the western side of the crater floor. An adjacent pond (purple) is feeding lava to a larger lake (red); though at times the lava level has dropped and circulation has diminished, the pond and lake have consistently hosted active lava in recent weeks. The eruption statistics provided here are current as of the last HVO overflight on March 30, 2022; the volume-averaged surface of the whole lava lake was approximately 2,769 ft (844 m) above sea level at that time. - Source : HVO-USGS

Kilauea , cratère Halema'uma'u : One eruptive vent (orange) is active within Halema‘uma‘u, on the western side of the crater floor. An adjacent pond (purple) is feeding lava to a larger lake (red); though at times the lava level has dropped and circulation has diminished, the pond and lake have consistently hosted active lava in recent weeks. The eruption statistics provided here are current as of the last HVO overflight on March 30, 2022; the volume-averaged surface of the whole lava lake was approximately 2,769 ft (844 m) above sea level at that time. - Source : HVO-USGS

The eruption at Kīlauea Volcano's summit in Halema'uma'u Crater is currently ongoing. Surface activity continues in the active lava lake and the lava flow on the crater floor from the west vent is still active at this time. The tilt is currently on a flat trend. Lava will likely be on the surface of the active lava lake tonight.

The current Volcanic Alert Level is Watch, and the current Aviation Color Code Orange.

 

Source: HVO

Halema'uma'u - thermal image from 11.04.2022 / 8:14 p.m. - webcam therm .HVO

Halema'uma'u - thermal image from 11.04.2022 / 8:14 p.m. - webcam therm .HVO

Kilauea - very high therm anomalies as of 04.11.2022 / 9:15 p.m. - Doc. Mirova_MODIS_logVRP

Kilauea - very high therm anomalies as of 04.11.2022 / 9:15 p.m. - Doc. Mirova_MODIS_logVRP

Over the past seven days, high volcanic unrest has continued at Mount Ruapehu, rising to heightened levels. This increased unrest is manifested primarily by volcanic tremors and increased gas production. Tremor levels remain elevated but have decreased from the peak reached on April 6-7, 2022. An airborne gas flight completed yesterday confirmed increased gas production across Crater Lake, particularly CO2 (dioxide of carbon), being the 2nd highest value ever recorded.

The temperature of Crater Lake (Te Wai ā-moe) is now 38°C. Our modeling suggests that approximately 280 MW of heat is required to maintain the temperature of this lake. The temperature and heat input remain within the typical range of a heating cycle. The crater lake remains a battleship gray color with upwellings in the northern vent area and a small overflow. Sulfur sheets are present on the surface of the lake.

Ruapehu - image archives GNS / Brad Scott 10.04.2019

Ruapehu - image archives GNS / Brad Scott 10.04.2019

The sustained nature of volcanic unrest now differs from that typically seen at the onset of a warming phase. Volcanic tremor signals and elevated gas production are now more indicative of processes driven by molten rock (magma) interacting with the geothermal system deep within the volcano.
The interpretation of this activity is consistent with elevated volcanic unrest at the Elevated Level and therefore the Volcanic Alert Level remains at Level 2. The Aviation Color Code remains at Yellow.

The interpretation of this activity is consistent with elevated volcanic unrest at the Elevated Level and therefore the Volcanic Alert Level remains at Level 2. The Aviation Color Code remains at Yellow.

 

Source: GeoNet

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