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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, #Sismologia
Anak Krakatau - eruptive episode of 06.17.2022 / 00:43 WIB - PVMBG / Magma Indonesia webcam - one click to enlarge

Anak Krakatau - eruptive episode of 06.17.2022 / 00:43 WIB - PVMBG / Magma Indonesia webcam - one click to enlarge

The activity of Anak Krakatau continues on June 17, 2022.

Seismicity was characterized by:

- 3 eruption earthquakes, respectively at 00:42 WIB, with a plume of black ash observed at ± 500 m above the summit (± 657 m above sea level) recorded on a seismograph with a maximum amplitude of 62 mm and a duration of 53 seconds.
Another at 2:45 p.m. WIB, with the height of the ash column, gray to black, observed at ± 700 m above the summit (± 857 m above sea level). This eruption was recorded on a seismograph with a maximum amplitude of 58 mm and a duration of 71 seconds.
The third episode was observed at 6:39 p.m. WIB, with a black ash plume observed ±500 m above the summit (±657 m above sea level). This eruption was recorded on a seismograph with a maximum amplitude of 60 mm and a duration of 84 seconds.

- 7 emission earthquakes, with an amplitude of 14 to 34 mm and the duration of the earthquake from 10 to 27 seconds.
- 28 low frequency earthquakes, with an amplitude of 6 to 40 mm and an earthquake duration of 4 to 10 seconds.
- 2 hybrid/multiphase earthquakes
- 26 shallow volcanic earthquakes
- 5 deep volcanic earthquakes
- 4 episodes of continuous tremor, with an amplitude of 1 to 40 mm, dominating 3 mm.

 

The activity level remains at 3 / siaga; People/visitors/tourists/climbers should not approach Anak Krakatau or engage in any activities within 5km of the active crater.

 

Source: PVMBG, Magma Indonesia

Anak Krakatau - eruptive episode of 06.17.2022 / 2:45 p.m. WIB - PVMBG / Magma Indonesia webcam - one click to enlarge

Anak Krakatau - eruptive episode of 06.17.2022 / 2:45 p.m. WIB - PVMBG / Magma Indonesia webcam - one click to enlarge

Anak Krakatau - eruptive episode of 06.17.2022 / 6:07 p.m. - PVMBG / Magma Indonesia webcam - one click to enlarge

Anak Krakatau - eruptive episode of 06.17.2022 / 6:07 p.m. - PVMBG / Magma Indonesia webcam - one click to enlarge

This week from June 10 to 16, lava avalanches were observed 58 times southwestward at Merapi, dominating the Bebeng River with a maximum slip distance of 1,800 m.

In the southwest dome, there is no change in the height of the dome. For the middle dome, no significant morphological change was observed. According to photo analysis, the volume of the southwest lava dome is 1,551,000 m³ and the central dome is 2,582,000 m³.

The intensity of seismicity this week is still quite high. Mount Merapi's deformation, which was monitored using EDM this week, showed a distance shortening rate of 0.4 cm/day.

Merapi - visual and seismicity / deformation as of 06.16.2022 - Doc. BPPTKG

Merapi - visual and seismicity / deformation as of 06.16.2022 - Doc. BPPTKG

Merapi's volcanic activity is still quite high in the form of effusive eruption activity. The activity level remains at 3/siaga.The current potential danger is lava avalanches and hot clouds in the south-southwest sector covering Boyong River for up to 5 km, Bedog River, Krasak , Bebeng for a maximum of 7 km. The southeast sector covers the Woro River for a maximum of 3 km and the Gendol River for a maximum of 5 km. The ejection of volcanic material in the event of an explosive eruption can reach a radius of 3 km from the summit.

 

Sources: BPPTKG, PVMBG, Magma Indonesia

Kilauea - West Halemaʻumaʻu vent and lava lake, from northwest caldera rim looking south [V1cam] 2022-06-16 07:46 - HVO - click to enlarge

Kilauea - West Halemaʻumaʻu vent and lava lake, from northwest caldera rim looking south [V1cam] 2022-06-16 07:46 - HVO - click to enlarge

The eruption at Kīlauea Volcano's summit in Halema'uma'u Crater has continued for the past 24 hours. All recent lava activity has been confined to the crater, and current data indicates that this scenario is likely to continue.
Lava eruption from the West Halema'uma'u vent into the active lava lake and seeps on the crater floor have continued over the past 24 hours. The active lava lake showed continued surface activity with stable lava lake levels over the past 24 hours, remaining below overflow. Lava seepage activity continued along the northern and southern edges of the crater floor.

Kilauea -Halemaʻumaʻu - 06.17.2022 / 03:47 - HVO webcam - click to enlarge

Kilauea -Halemaʻumaʻu - 06.17.2022 / 03:47 - HVO webcam - click to enlarge

A deflationary event that began on June 14 caused the lava lake to fall 7 meters. Since this deflationary event, a 2.5 microradian inflationary event has occurred beginning at approximately 11:45 p.m. on June 15 and the lava lake has since risen 2 m. Lava seepage activity continued along the northern and southern edges of the crater floor.

Summit tiltmeters have recorded deflation over the past 24 hours. A sulfur dioxide emission rate of approximately 1,350 tonnes per day (t/d) was measured on June 10, 2022.

Current Volcanic Alert Level: Watch - Current Aviation Color Code: Orange

 

Source: HVO

Teide - the Pico Viejo from the summit - author not referenced - one click to enlarge

Teide - the Pico Viejo from the summit - author not referenced - one click to enlarge

This Friday, June 17, 2022, between 01:50 a.m. and 04:10 a.m. (Canarian time), the seismic network, operated by the Volcanological Institute of the Canary Islands (INVOLCAN), recorded a swarm of hybrid events of very low magnitude under the Teide volcano, with epicenters located southwest of PicoViejo. In this time interval of 2 hours and 20 minutes, at least 300 seismic events have been identified.


This seismic swarm has very similar characteristics to the swarms that were recorded on October 2, 2016 and June 14, 2019. The most likely origin of this type of swarm is the movement of fluids such as steam, gas or l water, inside the hydrothermal system of the Teide volcano. This swarm does not imply a higher probability of an eruption in the short/medium term, but it reminds us that Tenerife is still a volcanically active island.

 

Sources : IGN.es - InVolcan

Teide - Seismic swarm with epicentres located southwest of PicoViejo; and seismogram of 17.06.2022 / 02h – Doc. IGN.es
Teide - Seismic swarm with epicentres located southwest of PicoViejo; and seismogram of 17.06.2022 / 02h – Doc. IGN.es

Teide - Seismic swarm with epicentres located southwest of PicoViejo; and seismogram of 17.06.2022 / 02h – Doc. IGN.es

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