Geobulletin alpha

El canal d'allaus del torrent Ribal (Arinsal, Ordino, Andorra) 

Un bloc de roca de mig metre de diàmetre al carrer, al peu d'una marquesina d'autobusos, envoltat per tres cons i una cinta policial. Al vidre de la marquesina hi ha un forat net marcant el perfil exacte del bloc. Estem a l'entrada de la Massana, a Andorra; un país on imagino que a tots aquells que hi enteneu de riscos geològics sou víctimes potencials d'un Síndrome de Stendal geotècnic. De fet

Geology Fun Fact - Earthquake Waves 

Geology Fun Fact What kind of waves are produced in an earthquake?It is usually thought that there are only two main types of seismic (earthquake) waves. These are the Primary (P) Waves and the Secondary (S) Waves. But there is also a third main category called Surface Waves. These can be broken into 2 categories called Love Waves and Rayleigh Waves. Surface Waves produce the most shaking and the most damage of the land surface. Love Waves shake the ground back [...]