Activity of Tungurahua and Popocatepetl volcanoes.

The top of the Popocatepetl 10.04.02015 - photo CENAPRED

An overview of Popocatepetl / Mexico was conducted on April 10 by the teams of CENAPRED, assisted by the Policia Federal.

Good conditions of observations have confirmed the establishment between 24.03 and 04.04.2015 of a lava dome, the 56 °, at the bottom of the inner crater; its diameter is at least 250 meters for a thickness of 30 m. Its surface has a series of concentric fractures, and its central portion collapsed, indicating a deflation after its establishment. It will likely be destroyed in the coming days or weeks by an explosion, like its predecessors.

The alert level is Amarillo Phase 2, and access to recommended volcano.

Source: CENAPRED 04/11/2015
 

Popocatepetl - Internal crater and dome marked by concentric fractures - photo CENAPRED

Tungurahua since Cruz Cotaló on 09/04/2015 - the volcano has at this time a white light emitting steam. - photo IGEPN

The warning level of Tungurahua / Ecuador has been noted in Naranja on April 11 for the area of ​​influence of the volcano by the Secretariat of Risk Management.

The IGEPN reported that the activity of the Tungurahua is considered as "high"; increased seismicity and ash falls were recorded, and the tremor (the 09.04) and a plume of ash and gas rising 600 meters above the crater.

The most likely scenario for the evolution proposed, similar to that characterizing the eruptive phase in February 2014, would be one or more high-energy explosions and release of large amounts of material in the form of a high eruption column of gas and ash ; possible pyroclastic flows will be dependent on the energy of explosions and of offending magma volume.

Source:

- IGEPN 04/10/2015

- SGR 04/10/2015

Location of LP earthquakes in recent months, and until 04.10.2015 / 11:30 - The majority of LP earthquakes are recorded between 1 and 3 km. beneath the crater ... Note: 2 LP major earthquake are located 6 km away. beneath the crater, which may indicate a new magma input. - Doc. IGEPN

Survey of tilt meters from the station RETU 10/04/2015 - since April 4, an inflation phase of 20 microradians / day is noted. - Doc. IGEPN