Esterri de Cardós seismic station (CEST) | icgc

Esterri de Cardós seismic station (CEST)

Code: CA.CEST Name: Esterri de Cardós 

Latitude: 42.5986 N Longitude: 1.2540 E Height: 1325 m

Local depth: - m

Owner: Institut Cartogràfic i Geològic de Catalunya

Soil features
LithologyPeriodVs30 (m/s)Classe EC8F0 (Hz)
Sandstones and lutitesCambroordovician1759A-
Instrumentation by channels and periods
ChannelsStart dateSensor typeDigitizer typeInstrumental response
HHZ, HHN, HHE01/06/2006Broadband velocimeter24 bits[StationXML]

 

Geophysical characterisation

H/V Spectral ratio from seismic noise

H/V Spectral ratio from seismic noise records of Esterri de Cardós seismic station. It is observed an almost flat curve, without any significant peak which might be associated to  the fundamental frequency of the soil. This behaviour is typical of rock sites.

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H/V Spectral ratio of seismic noise records from Esterri de Cardós seismic station

H/V Spectral ratio of seismic noise records from Esterri de Cardós seismic station

 

P-waves velocity model

The P-waves velocity model, obtained by seismic refraction tomography is characterized by a strong velocity gradient. In the sector of the seismic station, velocities higher than 2500 m/s are reached at a depth of about 5 meters. These high velocity values ​​are associated with unweathered non-ripable rock, and can be interpreted as the bedrock.

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P-waves velocity model of Esterri de Cardós seismic station

P-waves velocity model of Esterri de Cardós seismic station

 

S-waves velocity model

In the shear wave (VS) propagation velocity model obtained by seismic refraction tomography, high velocities are observed near the surface. In the area of ​​the seismic well the bedrock is reached (VS = 1000 m/s) to 1 meter of depth, and at 5 meters of depth the isoline of 1500 m/s is detected, that habitually is associated to very hard rock .

Imatge
S-waves velocity model of Esterri de Cardós seismic station

S-waves velocity model of Esterri de Cardós seismic station