In the picture below (Figure 1) can be seen as the wave front from the oceanic rift reaches the island of La Palma fault ravine ravine anxieties of lime is the tangent to the wavefront (red line image) is the line where most, is the energy carried by the compression wave, this is the cause of the failure itself.
As we have already seen the collapse of the western flank of the island that gave rise to the valley of Aridane caused the displacement of this wave front to the south resulting in a new fault current training and extension anomalous of the island to the south, anomalous that these islands have a size set by the frequency of the compression wave (determined by the growth of the Atlantic Ridge) and the width of the north of the island, it is as if the island Palma was double, an island north to the crater stew fails rowing and another from there to fuencaliente in the south.
In the next picture (Figure 2) can be cut into the crater of the stew made to build the ring S / C de la Palma, as can be seen that the fracture is caused by the wave front moved south (second red line) on the south side, left, has risen about 4 meters from north (this increase is the result of thrust of the wavefront on the tripod 2 centered at the peak virigoyo is the same phenomenon that produces the elevation of the bottom of the Caldera and his rock pillow, but now the phenomenon is repeated in the new structure facilitates new elevation trípode.La sinking of new valley from this flaw because the rise, as seen in picture 2, the valley tends to discard the existence of one's fault then the collapse favors lifting the entire structure by the weight loss it is and this again favors the collapse ...
we can see that the sinking of the valley is the fault Aridane 1 to the boiler also the new valley, whose formation can be deduced by the incipient arc Bonelli eruption appeared in the San Juan in 1949 follows the path of failure 2 until it intersects with the arc.
I have spoken before of the east-west symmetry of the triangular islands, as we also repeated the structure to the south.
'll go into more detail in a future installment of this blog. While in depth at the origin of volcanism in the blog http://causasdelvulcanismo.blogspot.com/
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