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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
Pacaya - 21.01.2021 - degassing between the explosions and lava flow on the southern flank (right of the image) - photo Conred - one click to enlarge

Pacaya - 21.01.2021 - degassing between the explosions and lava flow on the southern flank (right of the image) - photo Conred - one click to enlarge

Pacaya - thermal anomalies at 01.22.2021 at 03.50 a.m. - Doc.Mirova_MODIS_Latest10NTI

Pacaya - thermal anomalies at 01.22.2021 at 03.50 a.m. - Doc.Mirova_MODIS_Latest10NTI

At Pacaya, weak to moderate explosive activity marks Mackenney crater, with ash emissions 100-200 meters above the crater.

The effusive activity feeds a lava flow, 800 meters long, on the southern flank; avalanches are observed at the flow front.

The PCG and PCGS seismic stations record tremor, associated with the rise of magma, the movements of the lava flow and gases.

 

Sources: Insivumeh and Conred

Raung - gray ash emission on 01.22.2021 / 07:27 a.m. WIB - PVMBG webcam

Raung - gray ash emission on 01.22.2021 / 07:27 a.m. WIB - PVMBG webcam

Raung - seismicity at 01.21.2021 - increase in tremor and emission earthquakes - Doc. PVMBG / Magma Indonesia

Raung - seismicity at 01.21.2021 - increase in tremor and emission earthquakes - Doc. PVMBG / Magma Indonesia

Gunung Raung, East Java's activity level was increased from level I (normal) to level II (alert) on January 21, 2021

On January 20, 2021, a deep volcanic earthquake was recorded, followed by a non-harmonic tremor, indicating a supply of magma from a depth below the summit crater of Mount Raung.

The height of the gas column and the color of the blower began to change on January 21, 2021. The color of the blown column indicates that there is ash carried to the surface.

 

At Activity Level II (Alert), it is recommended that the public / visitors / tourists do not perform activities within 2 km of the crater / peak.

Local governments, provincial and regency BPBDs should always coordinate with Raung Volcano Observation Post in Mangaran Village, Sumber Aru Village, Songgon District, Banyuwangi Regency, east of Java and / or with the Center for Volcanology and Geological Disaster Mitigation in Bandung.

 

Sources : PVMBG & Magma Indonesia

Anak Krakatau - video by GSM camera and drone of the volcano's morphology / 2020.12 - Indonesian Volcano

In a recent video from Anak Krakatau, based on cell phone and drone footage, we can observe the volcano's new morphology : a pyroclastic cone estimated to be 90 meters high, while the current summit is 158 meters. A lava flow in an easterly direction is up to 10 meters thick.

 

The Krakatau is currently in activity level 2 / waspada.

The seismicity of January 21, 2021 is characterized by:

1 emission earthquake, with an amplitude of 4 mm and the earthquake lasts 15 seconds.

8 low frequency earthquakes, with an amplitude of 6 to 13 mm and the duration of the earthquake was 7 to 10 seconds.

A distant tectonic earthquake

and a continuous tremor with an amplitude of 1-13 mm, dominating 2 mm.

 

The public / tourists are not allowed to approach the crater within 2 km of the crater

The latest VONA received the color code ORANGE, published on April 17, 2020 at 5:51:00 PM WIB. , without observation of the rash.

 

Sources: PVMBG, Magma Indonesia

Popocatépetl - 17.01.2021 ash emission - photo © Thierry Sluys (see also article of the 17.01)

Popocatépetl - 17.01.2021 ash emission - photo © Thierry Sluys (see also article of the 17.01)

Popocatépetl - image Sentibel 2 nat. colors from 01.21.2021 - via A.Vecoli / Twitter

Popocatépetl - image Sentibel 2 nat. colors from 01.21.2021 - via A.Vecoli / Twitter

The activity of Popocatépetl has declined over the last 15 days in 4 volcano-tectonic earthquakes, 408 exhalations, 9 explosions and 13,559 minutes of tremor. The ash emissions follow one another in a north direction.

 

During the last 24 hours, thanks to the monitoring systems of the Popocatépetl volcano, 8 exhalations and 1,327 minutes of tremor have been identified, accompanied by emissions of water vapor, volcanic gases and small amounts of ash.

They are interspersed with volcanic gas emissions which disperse northward.

 

The alert level remains at Amarillo fase 2, with a safety zone of 12 km.

 

Sources: CENAPRED and webcams of Mexico

Popocatépetl - 21.01.2021 / 08:24 - WencamsdeMexico

Popocatépetl - 21.01.2021 / 08:24 - WencamsdeMexico

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