RT Journal Article
T1 Paleoearthquake evidence in Tenerife (Canary Islands) and possibleseismotectonic sources
A1 González de Vallejo, Luis I.
A1 Capote del Villar, Ramón
A1 Cabrera Pérez, Luis
A1 Insúa Arévalo, Juan Miguel
A1 Acosta Yepes, Juan
AB 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
PB Springer Verlag
SN 0025-3235
YR 2003
FD 2003
LK https://hdl.handle.net/20.500.14352/57323
UL https://hdl.handle.net/20.500.14352/57323
LA eng
NO The original publication is available at www.springerlink.com
DS Docta Complutense
RD 28 abr 2024