type 'Slope stability in the Canary volcanoes based on geotechnical criteria' into Google and click 'quick view' on the first link shown.



this entire area is a timebomb

on page 4..

'5

As rock masses are constituted by a sequence of massive lava flows, scoriaceous and pyroclastic layers in uncertain proportions, it is expected that the equivalent Mohr-Coulomb parameters will correspond to intermediate values between the purely unweathered massive rocks and the purely pyroclastic massif. However, the relevance of the relative proportions between rock mass and pyroclastic, dramatically decreases when geologic conditions deteriorate. '

(translation - when magma is injected, and the ground above deforms, the status quo is disturbed, making a landslide FAR more likely!)

cont..

'Concerning this fact, three areas of special relevance have been highlighted for their potential risk of catastrophic landslides in the Canary Archipelago. 'Teide Stratovolcano' (Tenerife), with average slope gradient of 30 degrees, 'El Julan ' (El Hierro), with average slope gradient of 25 degrees and the 'Cumbre Vjeja Rift Zone' (La Palma), with average slope gradient of 25 degrees........ '



cont..

'All of them with slope heights higher than 1000m exhibit conditions of slope gradient that overcome the friction angle of their rock massifs and of low cohesion that became those areas as susceptible of suffering gigantic slides. (HERE IT COMES ..) Internal cohesion will drop by shallow magma injection,..'