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Earth of fire

Actualité volcanique, Article de fond sur étude de volcan, tectonique, récits et photos de voyage

Publié le par Bernard Duyck
Publié dans : #Actualités volcaniques

At Popocatépetl, nocturnal glow is reported, increasing during the "exhalations".
During the day of 31 March, continued emissions of gas and water vapor are observed and 110 exhalations and 5 explosions accompanied by ash plumes to 1,800 meters dispersing to ENE, in the past 24 hours.

 

Popocatépetl - nocturnal activity 31/03/2016 - Photo webcamsdeMexico
Popocatépetl - nocturnal activity 31/03/2016 - Photo webcamsdeMexico

Popocatépetl - nocturnal activity 31/03/2016 - Photo webcamsdeMexico

Popocatépetl - 03.31.2016 / 3:21 p.m. - via Luis Felipe Puente

Popocatépetl - 03.31.2016 / 3:21 p.m. - via Luis Felipe Puente

At 15h21, this 31 March, a loud explosion was accompanied by an  ash plume riing to 2,000 meters.
Two volcano-tectonic earthquakes, respectively at 17:39 of M1.3 and M 1.5 at 23:15, were recorded at a depth of 5.5 km below the crater. To this, are added 55 minutes of  harmonic tremor of low amplitude and a series of LP earthquakes during 44 minutes.
Despite some high-sounding titles of the press, CENAPRED confirms that the activity remains within the volcanic alert Amarillo Phase 2.


Source: CENAPRED

This March 31, the Nevado del Ruiz presented various episodes of volcanic tremor of short duration and high energy levels. Among them, the episode of  8:04 local time, combined with emission ash amount to 3,500 meters above the summit of the volcano, is responsible for ash fall on a southwest sector.


Source: Colombia - SGC Manizales

Nevado del Ruiz - sismo and spectrogram of volcanic tremor signal and webcam images - SGC Manizales

Nevado del Ruiz - sismo and spectrogram of volcanic tremor signal and webcam images - SGC Manizales

In Peru, the IG reported an increase in March of the seismicity of Tiscani volcano, and the presence of hybrid-type earthquakes.
During the month of March, 832 VT earthquakes of Magnitude between  0.5 and 4, and a depth between 4 and 10 km, are divided into two groups, the first near the Tiscani, the second 5 km at east of the massif.


Source: IG Peru
 

Tiscani - location of VT earthquakes in March (red circles) - Doc. IGP

Tiscani - location of VT earthquakes in March (red circles) - Doc. IGP

Tiscani - Photo © S. Byrdina, IRD via Futura science

Tiscani - Photo © S. Byrdina, IRD via Futura science

Etna recalls our attention with ash emissions from the northeast crater.
Without details, the site of the INGV Catania was unavailable this morning.

Activity of Popocatépetl, Nevado del Ruiz, Tiscani and Etna.

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