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, #Sismologie
Etna Voragine - 15.06.2019 / 4:13 UTC - thermal webcam of La Montagnola / INGV
Etna Voragine - 15.06.2019 / 4:13 UTC - thermal webcam of La Montagnola / INGV

Etna Voragine - 15.06.2019 / 4:13 UTC - thermal webcam of La Montagnola / INGV

An explosive activity with ash emission began at Voragine crater of Etna in the afternoon of June 13, with a frequency and intensity very variable and discontinuous over time. The phenomenon is located on the crater bottom of the Voragine, where a new mouth has opened, which produces ashes that disperse quickly in the summit area. Associated with the ash, we also have material fallout on the terrace of the crater.

Etna Voragine - ash emission from 14.06.2019 - video image / La Gazzetta

Etna Voragine - ash emission from 14.06.2019 - video image / La Gazzetta

A visit of the INGV teams on the morning of June 15 confirms the emission of ash, spaced between 1 and 10 minutes; the explosions are for the most part silent, sporadically accompanied by noise and emission of materials which concerns in part the outside of the crater rim. Regarding the average amplitude of the volcanic tremor, no significant variation was recorded. However, in recent hours, while remaining confined to low values, there appears a slight and gradual upward trend. Infrasonic signals attest to a low level of activity.

The images of the thermal webcam of Montagnola show a particularly strong explosion, at 04:13 UTC (06:13 local), with emission of hot materials.

 

Source: INGVvulcani

Tenerife - location of the seismic swarm from 12-14 June 2019 - Doc. IGN Spain

Tenerife - location of the seismic swarm from 12-14 June 2019 - Doc. IGN Spain

The Canary Islands Volcanology Institute (INVOLCAN) informs that at 15:28 (Canary Islands time) on 14/06/2019 the Canary Seismic Network (RSC) has detected a long-lasting seismic episode located in the North-East from Guía de Isora - southwest of Pico Viejo (Teide / Tenerife), 10 km deep. The magnitude of this event is 1.8 and this is one of the high profile events since the launch of the RSC in November 2016.

It also indicates that the seismic network recorded a swarm of more than 500 LP seismic events from 17:09 to 18:50 local on 14/06/2019.

Tenerife / Teide - seismicity of 14.06.2019 / 16h-18h - Doc IGN.es
Tenerife / Teide - seismicity of 14.06.2019 / 16h-18h - Doc IGN.es

Tenerife / Teide - seismicity of 14.06.2019 / 16h-18h - Doc IGN.es

The origin of these seismic swarms is probably related to the injection of magmatic fluids into the volcanic hydrothermal system of the island of Tenerife.

This activity is consistent with the seismicity recorded on the island of Tenerife during the last three years. The absence of significant field deformations makes the direct involvement of a superficial magmatic system unlikely.

 

Source: InVolcan & IGN.es

Commenter cet article

Articles récents

Hébergé par Overblog