Paleoseismological data from a new trench across the El Camp Fault(Catalan Coastal Ranges, NE Iberian Peninsula)

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H. Perea
P. M. Figueiredo
J. Carner
S. Gambini
K. Boydell

Abstract

The El Camp Fault (Catalan Coastal Ranges, NE Iberian Peninsula) is a slow slipping normal fault whose
seismic potential has only recently been recognised. New geomorphic and trench investigations were carried out
during a training course across the El Camp Fault at the La Porquerola alluvial fan site. A new trench (trench 8)
was dug close to a trench made previously at this site (trench 4). With the aid of two long topographic profiles
across the fault scarp we obtained a vertical slip rate ranging between 0.05 and 0.08 mm/yr. At the trench site,
two main faults, which can be correlated between trenches 8 and 4, make up the fault zone. Using trench analysis
three paleoseismic events were identified, two between 34.000 and 125.000 years BP (events 3 and 2) and another
event younger than 13 500 years BP (event 1), which can be correlated, respectively, with events X (50.000-
125.000 years BP), Y (35.000-50.000 years BP) and Z (3000-25.000 years BP). The last seismic event at the La
Porquerola alluvial fan site is described for the first time, but with some uncertainties.

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How to Cite
1.
Perea H, Figueiredo PM, Carner J, Gambini S, Boydell K. Paleoseismological data from a new trench across the El Camp Fault(Catalan Coastal Ranges, NE Iberian Peninsula). Ann. Geophys. [Internet]. 2003Dec.25 [cited 2021Oct.21];46(5). Available from: https://www.annalsofgeophysics.eu/index.php/annals/article/view/3454
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