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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 : #volcanic activity
 Popocatépetl - 15.07.2019 / 22h54 - WebcamsdeMexica / Cenapred / Seguridad

Popocatépetl - 15.07.2019 / 22h54 - WebcamsdeMexica / Cenapred / Seguridad

Popocatepetl has, during the last 24 hours, exhibited 236 exhalations accompanied by water vapor, gas, and slight quantities of ashes;

four explosions were recorded: three moderates, the first on July 15 at 22:53, the others on July 16, at 3:50 and 5:42; a last small explosion occurred on July 16 at 14:10. There is no mention of falling ash.

At the seismicity level, 309 minutes of tremor were recorded, as well as 2 volcano-tectonic earthquakes with respective magnitudes of 1.9 and 1.6. At around 11:00 am on July 16, the Cenapred observed an emission of steam, gas and light amounts of ash towards O-NO.

The alert remains at Amarillo fase 2.

 

Source: Cenapred

Poas - recharge of the crater lake - photo Ovsicori 16.07.2019 / 17h59

Poas - recharge of the crater lake - photo Ovsicori 16.07.2019 / 17h59

During the week of July 9-16, the lake in the main crater of Poas, Costa Rica, continued to recharge. Positive variations in the level of water brought by the rainy season are followed by decreases due to evaporation, following a dynamic in a final positive balance.

Gases continue to come out of mouths B and A, the latter almost completely covered by water.

The seismic activity remains weak, characterized by LP earthquakes.

Caution is recommended near drainages in case of rain, secondary lahars can be generated.

Turrialba - presence of 2 summit lakes and degassing - photo RSN 08.07.2019

Turrialba - presence of 2 summit lakes and degassing - photo RSN 08.07.2019

The Turrialba maintains a weak and stable activity, with a plume of steam and gas, dispersed towards a west and south-west sector.

The crater glow recorded by webcams remained low, compared to that of previous months.

Two lakes are always mentioned at the summit; a third forms temporarily after a few hours of rain, then disappears.

Some LP earthquakes were recorded during the past week.

 

Source: Red Sismologica Nacional

Nevado del Huila - archive image 07.07.2018 / SGC

Nevado del Huila - archive image 07.07.2018 / SGC

Between 9 and 15 July, the SGC / Obs. de Popayán recorded in the Nevado del Huila 121 VT earthquakes, in relation with rock fracturing, and 41 earthquakes (including 38 LPs), related to the dynamics of internal fluids.

Most earthquakes are located northwest of the volcano, between 11 and 23 km away from the central peak, and at depths between 5 and 12 km.

Low degassing of the volcanic system is observed, with sulfur dioxide fluxes considered as low and measured on July 9 at 1,172 tonnes / day.

The activity level remains at 3 / yellow - change in behavior of volcanic activity.

 

Source: SGC / Servicio Geologico Colombiano

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