Southern Spanish coast and north African autonomous city, Melilla, felt a significant seismic movement last night. Spanish Geographical Institute (IGN) is reporting the occurrence of tens of small movements as well as some medium magnitude ones in the last days, with a maximum of 6.3 in Richter scale last evening. The city of Melilla has reported some damages and some minor injuries, with no fatalities at this time. It corresponds to a V intensity, with IV-V close to Algeciras in the Strait of Gibraltar, as well as IV intensity level in tens of locations in the coast and inland of Andalusia. It's too early to know all the consequences and any information update is welcomed.
The world of volcanoes is definitely exciting. But did you know that the place with the most active volcanism is in another world? The third largest satellite of Jupiter, Io, slightly larger than the Moon, has about 400 active volcanoes. Most surprising is that the origin of this volcanism is anything but conventional. Io orbits Jupiter closer than the other three large moons, Europa, Ganymede and Callisto - the three being called Galilean in honor of its discoverer. The intense volcanic activity is due to the enormous gravitational pull of Jupiter, and also to the interaction with Europa and Ganymede. This is, in effect, "tidal forces" instead of causing low tides and high tides, resulting in tremendous friction in the inner layers of the satellite, which is heated causing volcanic eruptions.
One of the most interesting geographical features in the eastern Almería is the Níjar serrata. It is a low relief dividing the "Campo de Níjar" two. The first thing that is striking to observe is that its course is almost straight. Observed with some detail, we shall see that it presents sharp lithological changes, ie, the type of rock found can change in just a few steps from volcanic to sedimentary. Another feature that can be found, if we pay attention, is that the small and ephemeral streams that start from the Serrata and make their way to the plain are displaced laterally, longitudinally to the axis of the sierra, as if a ditch would have been built at the foot of it to carry water and sediments tens of meters ahead or behind. Finally, if we eventually move into one of those courses and touch the rocks, sooner or later we will find a very striking, laminated rock, that appear to have been polished to reflect light like a mirror.
Apasionado de la ciencia, la fotografía y los viajes. Geólogo de formación y guía de naturaleza por vocación.