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
 Stromboli - lava flow over 500 m - therm. cam. GST 08.07.2019 / 21:29 via Doc. LGS

Stromboli - lava flow over 500 m - therm. cam. GST 08.07.2019 / 21:29 via Doc. LGS

From 8 pm local time on July 8, 2019, an overflow of lava from the south-west crater of Stromboli generated a lava flow of up to 500 m along the Sciara del Fuoco. The overflow is also confirmed by the analysis of the images of the thermal camera of Punta Dei Corvi, restored after the paroxysmal explosion of July 3

A thermal anomaly of 125 MW recorded at 20:50 UTC on 08.07, and 211 MW at 01h UTC, by Mirova

This heat flux value is in agreement with the current lava overflow, indicating an effusion rate of about 0.5 mc /s (LGS - 08.07.2019)

 

Sources: LGS & Mirova

http://lgs.geo.unifi.it/index.php/blog/trabocco-lavico-stromboli-08-luglio-2019

Stromboli - thermal anomalies on 09.07.2019 01h UTC - Doc. Mirova - one click to enlargeStromboli - thermal anomalies on 09.07.2019 01h UTC - Doc. Mirova - one click to enlarge

Stromboli - thermal anomalies on 09.07.2019 01h UTC - Doc. Mirova - one click to enlarge

On Java, the VAAC Darwin informs an emission of ash by the Semeru, reaching 4,000 meters of altitude (flight level 130), moving on 15 km in direction north-west this 8 of July; the ashes quickly dispersed, but a hot spot remains, and emissions remain possible.

The aviation code has changed to orange.

 

Source: VAAC Darwin

The Semeru, in the background, seen from the Tengger / Bromo caldera - as the guides say, the Semeru "coughs often" - archive photo unreferenced author

The Semeru, in the background, seen from the Tengger / Bromo caldera - as the guides say, the Semeru "coughs often" - archive photo unreferenced author

Following heavy rains in the region, a moderate to strong lahar was recorded by the STG8 seismic station of Santiaguito in Rio San Isidro on 7 July at about 23:00; its measurements are a height of 2 meters, width of 20-25 m, it carries blocks with a diameter of 2 to 3 meters, branches and tree trunks and sediments.

 

Source: Insivumeh

Santiaguito - seismic trace of lahar from 07.07.2019 / around 23h. - Doc. INSIVUMEH

Santiaguito - seismic trace of lahar from 07.07.2019 / around 23h. - Doc. INSIVUMEH

The bad weather prevailing in Central America makes any observation very difficult of the volcanoes of Costa Rica by the webcams.

The RSN teams made some photos of the Turrilaba in the field during a seismograph network maintenance day. We can observe a degassing mainly composed of water vapor at the active crater, and the presence of two small lakes in the summit zone.

 

Sources: Ovsicori & RSN

Turrialba - maintenance visit of 08.07.2019 - summit area - photo RSN

Turrialba - maintenance visit of 08.07.2019 - summit area - photo RSN

Turrialba - maintenance visit of 08.07.2019 - degassing active crater - photo RSN

Turrialba - maintenance visit of 08.07.2019 - degassing active crater - photo RSN

Commenter cet article

Articles récents

Hébergé par Overblog