Overblog
Editer l'article Suivre ce blog Administration + Créer mon blog

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
Nevados de Chillan - 13.07.2020 in the late evening - glow of the lava flow - photo Josefauna / Volcanologia in Chile

Nevados de Chillan - 13.07.2020 in the late evening - glow of the lava flow - photo Josefauna / Volcanologia in Chile

In Nevados de Chillan, the viscous lava flow emanating from the Nicanor crater continues to descend slowly the northern flank of the volcano.

The Sernageomin has determined a danger zone of 3 km to the west and up to 5 km to the east.

At night, we can notice the glow emitted by the flow; its emission rate is around 0.2m³ / sec.

 

Source: Sernageomin and Volcanologia in Chile

Nevados de Chillan - the lava flow during the day on 14.07.2020 - webcam Sernageomin Portezuelo

Nevados de Chillan - the lava flow during the day on 14.07.2020 - webcam Sernageomin Portezuelo

Also in Chile, on July 14, 2020 at 6:59 am local time, the National Geology and Mining Service recorded an earthquake related to rock fracturing, with a local magnitude of 3.0 and a depth of 0.2 km at Taapaca volcanic complex.

The Complex (5,861 m above sea level) is located on the high plateau of the Arica and Parinacota region, and is in 35th place in the classification of specific risks.

 The Taapaca volcanic complex - photo Daniel Bertin / Sernageomin

The Taapaca volcanic complex - photo Daniel Bertin / Sernageomin

The Complex (5,861 m above sea level) is located on the high plateau of the Arica and Parinacota region, and is in 35th place in the classification of specific risks.

Named locally Nevados de Putre, it corresponds to an elongated volcanic complex with an irregular profile, located on the western edge of the current volcanic front of the central Andes. Its activity dates back 2.7 million years with the emission of lava and mainly andesitic pyroclasts.

Over the past 1.5 million years, eruptive activity has migrated approximately 4 to 5 km to the southwest, limited to short periods of activity and separated by prolonged stages of immobility.

There is no record of historical eruptive activity. There are only hot springs and sulfur deposits associated with this eruptive center.

The alert level remains green; A potential reactivation would be linked to the location of the dacitic domes and to the subsequent generation of pyroclastic currents which would most likely affect the southwest flank of the volcano, the area where Putre is located, the main populated center of the altiplano region. (about 2,000 inhabitants), and the international route CH-11.

 

Source: Sernageomin

 Bulusan - photo archive 2016.10.08 / PHIVOLCS-SPDRRMO

Bulusan - photo archive 2016.10.08 / PHIVOLCS-SPDRRMO

The Phivolcs recorded since July 13 an increase in the number of volcanic earthquakes in Bulusan: it counts 33 in 24 hours on the 13th and 27 earthquakes in 24 hours on the 14th (period from 8h to 8h morning)

A very low emission of white plumes charged with vapor from the southeast vents was observed. Ground deformation data from continuous GPS measurements indicate short-term inflation of the building since late February 2020. These parameters indicate that volcanic processes are underway under the building which may be caused by deep degassing or hydrothermal activity or magmatic intrusion.

People living in the valleys and along the river canals, especially in the south-east, south-west and north-west of the building, must be vigilant against flows and lahars laden with sediment in case of strong prolonged rains.

Level 1 (abnormal) alert status currently prevails over Bulusan volcano, which means that it is currently in an abnormal state.

 

Source: DOST-PHIVOLCS

Iceland - earthquakes at 15.017.2020 / 07.35 am - Doc. IMO
Iceland - earthquakes at 15.017.2020 / 07.35 am - Doc. IMO

Iceland - earthquakes at 15.017.2020 / 07.35 am - Doc. IMO

Vatnajökull / Bárðarbunga - magnitude of the earthquakes on 15.07.2020 - the two earthquakes of more than M3 in the night of 13-14.07.2020 - Doc. IMO

Vatnajökull / Bárðarbunga - magnitude of the earthquakes on 15.07.2020 - the two earthquakes of more than M3 in the night of 13-14.07.2020 - Doc. IMO

Shortly before midnight on July 13 at 11:41 p.m. an earthquake of magnitude 3 shook the southeastern part of the Bárðarbunga caldera and about an hour later on July 14, another earthquake of magnitude 3.6 shook the region.

Earthquakes of this magnitude are common in Bárðarbunga.

 

Note that the seismic swarms continue in the Reykjanes peninsula, around Grindavik, and further north, at the mouth of the Eyjafjördur; In the north, there are more than 13,000 earthquakes, 3 of which are greater than 5.

 

Source: IMO

Commenter cet article

Articles récents

Hébergé par Overblog