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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

Subsoil features

Lithology

Period

Vs30 (m/s)

Classe EC8

F0 (Hz)

Sandstones and lutites

Cambroordovician

1759

A

-

Instrumentation by channels and periods

Channels

Start date

Sensor type

Digitizer type

Instrumental response

HHZ, HHN, HHE

01/06/2006

Broadband velocimeter

24 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.

H/V Spectral ratio of seismic noise records of 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.

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 .

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

Images

4 multimedia

General view: VSAT antenna, instrumental house, seismic vault cover, solar pannels solars and fence.