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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 : #Actualités volcaniques
 Poas - 01.01.2018 / 11:40 - Ovsicori webcam

Poas - 01.01.2018 / 11:40 - Ovsicori webcam

After the confectioners truce, the time has come to reconnect with the current volcanic activity.

 

In Costa Rica, the weather conditions at the beginning of the year prevent any observations of the three active volcanoes by the webcams.

Seismic stations record low amplitude tremor and some VT earthquakes in Turrialba, where small sporadic ash emissions are reported.

Low amplitude tremor is noted in Poas, as well as sulfur odors reported to Atenas.

In Rincon de La Vieja, milky sediments are reported in the Penjamo and  Azul rios and in the Quebrada Azufrada by the inhabitants of Buenos Aires of Upala, which could be related to hydrothermal eruptions of the volcano, confirmed by seismic signals.

Rincon de La Vieja - sediments in the nearby rivers on 02.01.2018 - photo Ovsicori

Rincon de La Vieja - sediments in the nearby rivers on 02.01.2018 - photo Ovsicori

Regarding the Poas National Park, the institutions in charge recommend to maintain the closure because of the 2,000 tons of sulfur dioxide emitted each day by the Poas volcano. Vigilance is maintained by the park guards, following the detection of intrusion of unauthorized persons, especially in the area of ​​Bajos del Toro. Local tourism and businesses located on the slopes of the volcano are directly impacted by this closure.

Sources: Ovsicori, RSN & Teletica

Reventador - 03.01.2018 / 13h27 - webcam IGEPN

Reventador - 03.01.2018 / 13h27 - webcam IGEPN

In Ecuador, the Reventador maintains an eruptive activity always qualified of high. The webcam showed the emission of a plume loaded with ashes on January 3 local 8:27, rising to more than 600 meters above the crater. IGEPN reports nocturnal glow when cloudiness allows observation.

Source: IGEPN

Sabancaya - summary table of activities from 25 to 31.12.2017 - Doc. IG Peru / OVI / Ingemmet

Sabancaya - summary table of activities from 25 to 31.12.2017 - Doc. IG Peru / OVI / Ingemmet

In Sabancaya, in Peru, the explosive activity of the last week of 2017 is downing, with only 42 daily explosions.

Seismicity level, LP earthquakes, related to fluid movements and emission tremor increased in number and hours of recording. The plumes of ash and gas have remained in past norms, with a max height. 2,900 meters above the crater. The maximum flow of SO2 was recorded on December 26, at 1,304 tons / day.

Sources: IG Peru / OVI / Ingemmet

Agung - small plume of steam and gas this 04.01.2018 / 11:44 WIB - photo PVMBG / Magma Indonesia

Agung - small plume of steam and gas this 04.01.2018 / 11:44 WIB - photo PVMBG / Magma Indonesia

In Agung, Indonesian authorities have reduced the radius of the security zone from 8-10 to 6 km, an area in which people have been displaced and must remain so; the volcanic alert remains fixed by PVMBG on the maximum : 4 / AWAS.

Source: Sutopo Purwo Nugroho / BNPB

Kanlaon - photo taken from Brgy on 09.12. 2017 - Courtesy of Ms. Ritchel Demerin Villanueva / Phivolcs

Kanlaon - photo taken from Brgy on 09.12. 2017 - Courtesy of Ms. Ritchel Demerin Villanueva / Phivolcs

At Kanlaon, the seismic network recorded 197 volcanic earthquakes in the last 24 hours and 14 tremor episodes, lasting 2 to 30 minutes. A white plume of steam was observed intermittently depending on visibility.

Sulfur dioxide emissions were measured at 640 tonnes / day on 2 January.

The alert level is 2, with a no-go permanent danger zone of 4 km radius.

Source: Phivolcs

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