%0 Journal Article
%A González De Vallejo González, Luis Ignacio
%A Capote Del Villar, Ramón
%A Cabrera Pérez, Luis
%A Insua Arévalo, Juan Miguel
%A Acosta Yepes, Juan
%T Paleoearthquake evidence in Tenerife (Canary Islands) and possibleseismotectonic sources
%D 2003
%@ 0025-3235
%U https://hdl.handle.net/20.500.14352/57323
%X A series of clastic dikes and tubular vents were identified in southern Tenerife (Canary Islands). These featuresare the result of seismic liquefaction of a Holocene sand deposit, as the consequence of a high intensitypaleoearthquake. The peak ground acceleration (pga) and magnitude of the paleoearthquake generating these liquefactionfeatures were estimated by back calculation analysis. A representative value of 0.30 ± 0.05 g was obtainedfor the pga. From this, an earthquake intensity of IX was estimated for the liquefaction site. Magnitude boundmethods and energy based approaches were used to determine the magnitude of the paleoearthquake, providing amoment magnitudeM = 6.8. The zone in which the liquefaction structures are found has undergone tectonic upliftand is affected by two faults. One of these faults was responsible for displacing Holocene materials. Dating of theuplifted sand formation indicates an age of 10,081 ± 933 years, the liquefaction features ranging from this age to3490 ± 473 years BP. This paleoearthquake was of much greater magnitude than those known historically. Faultswith neotectonic activity are significant features that should be borne in mind when assessing the seismic hazardsof the Canary Islands, presently considered as low and mainly of volcanic origin
%~