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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
 Nevados de Chillan - explosion and incandescent plume of 24.10.2019 / 9h43-44 - Doc. Sernageomin OVDAS

 Nevados de Chillan - explosion and incandescent plume of 24.10.2019 / 9h43-44 - Doc. Sernageomin OVDAS

Nevados de Chillan - Thermal anomalies on  23 & 24.10.2019 - Doc.Mirova 2019.10.24 / 18h05 MODIS_Latest10NTI

Nevados de Chillan - Thermal anomalies on 23 & 24.10.2019 - Doc.Mirova 2019.10.24 / 18h05 MODIS_Latest10NTI

The reports of Sernageomin follow one another on October 24, 2019 concerning the activity at Nevados de Chillan, and report high energy explosions, associated with a seismic signal LP and emissions of gas and pyroclasts, respectively at 0h33 local,  6:43 local, 9:44 local , and 17:06 local. The dispersion of emissions is predominantly eastward.

The seismicity of the past 24 hours is in volcano-tectonic earthquakes, the most energetic located 3.5 km deep and 2.300 meters at the ESE of the crater Nicanor, in large period earthquakes, VLP earthquakes and tremor episodes.

Thermal anomalies are reported by Mirova, with a maximum power of 103 MW on 23.10.

Since October 16th, a new lava flow has been observed on the NE flank; its progress remains slow.

The different parameters are interpreted as an injection of new materials into the internal system. The morphological changes in the active crater indicate a growing trend of the Nicanor crater on its SW edge, eroding the crater Arrau, and possibly leading to a collapse of the area.

The alert level remains in Naranja.

 

Source: Sernageomin

Piton de La Fournaise - seismic crisis this 25.10.2019 from 4:15 local time, accompanied by rapid deformation - Doc. OVPF

Piton de La Fournaise - seismic crisis this 25.10.2019 from 4:15 local time, accompanied by rapid deformation - Doc. OVPF

Since 4:15 local time on October 25, a seismic crisis is recorded on the instruments of the Volcanological Observatory of Piton de la Fournaise.

This seismic crisis is accompanied by rapid deformation. This indicates that the magma is leaving the magma reservoir and is spreading to the surface. An eruption is likely in the near future in the next minutes or hours.

The prefecture has decided to go on alert 1 of the specific device ORSEC volcano from 07:00 this morning.

Update : Aline Peltier, Director of the OVPF in the 12:30 PM of Réunion 1st: More than 1000 recorded earthquakes since the beginning of the seismic crisis. The magma continues its propagation at 12:30.

ERUPTION IN PROGRESS 14h40
ALERT 2-2

Source: OVPF

Find all the information related to the Piton de la Fournaise activity on the different media of the OVPF-IPGP:
- the website (http://www.ipgp.fr/fr/ovpf/actualites-ovpf),
- the Twitter account (https://twitter.com/obsfournaise?lang=en),
- and the facebook account (https://www.facebook.com/ObsVolcanoPitonFournaise/)

Piton de la Fournaise - Illustration of the deformation from 25.08 to 25.10.2019 / 05.45. Bases are shown here (variation of distance between two GPS receivers) crossing the Piton de la Fournaise building, at the top (at the top), at the base of the terminal cone (in the middle) and in the far field (at the bottom ) (see location on the associated maps). A rise is synonymous with elongation and therefore swelling of the volcano, inversely a decrease is synonymous with contraction and therefore deflation of the volcano. Any periods colored in light pink correspond to eruptions.

Piton de la Fournaise - Illustration of the deformation from 25.08 to 25.10.2019 / 05.45. Bases are shown here (variation of distance between two GPS receivers) crossing the Piton de la Fournaise building, at the top (at the top), at the base of the terminal cone (in the middle) and in the far field (at the bottom ) (see location on the associated maps). A rise is synonymous with elongation and therefore swelling of the volcano, inversely a decrease is synonymous with contraction and therefore deflation of the volcano. Any periods colored in light pink correspond to eruptions.

An eruption occurred at Sakurajima (Mount Minamidake summit crater) at 1827 on 24 April and the ash plume rose to 2500 m above the edge of the crater.

Volcanic ash is released from the crater southeast to Tarumizu and Kanoya and reaches Kagoshima City (Sakurajima) in just over an hour.

A fall of ashes is expected in the city of Tarumi, in Kagoshima Prefecture.

 

Source: JMA

Sakurajima - activity from 24.10.2019 / 18h29-18h36 - Doc. JMA

Sakurajima - activity from 24.10.2019 / 18h29-18h36 - Doc. JMA

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