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Soriguera seismic station (CSOR)

Code: CA.CSOR Name: Soriguera 

Latitude: 42.3744 N Longitude: 1.1327 E Height: 1227 m

Local depth: - m

Owner: Institut Cartogràfic i Geològic de Catalunya

Subsoil features

Lithology

Period

Vs30 (m/s)

Classe EC8

F0 (Hz)

Limestones and lutites

Devonian

1694

A

-

Instrumentation by channels and periods

Channels

Start date

Sensor type

Digitizer type

Instrumental response

HHZ, HHN, HHE

01/12/2001

Broadband velocimeter

24 bits

[StationXML]

Geophysical characterisation

H/V Spectral ratio from seismic noise

H/V Spectral ratio from seismic noise records of Soriguera 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 from Soriguera seismic station.

P-waves velocity  model

In the P-waves velocity model, obtained by seismic refraction tomography, significant lateral variations are observed along the seismic profile. In the seismic well sector, velocities higher than 2500 m/s are reached at a depth of about 3 meters, and values ​​higher than 3000 m/s are found at less than 5 meters depth. These high velocity values ​​are associated with unweathered non-ripable rock, and can be interpreted as the bedrock.

P-waves velocity model of Soriguera seismic station.

S-waves velocity model

In the shear wave (VS) propagation velocity model obtained by refractive seismic tomography, significant lateral velocity variations are detected. In the area of ​​the seismic station the  bedrock (VS = 1000 m/s) is detected at less than 2 meters depth, and at 3 meters depth it already exceeds 1500 m/s, which are associated with very rock hard.

S-waves velocity model of Soriguera seismic station.

Images

4 multimedia

Description: View of Soriguera station with the fence including the instrumental house, the solar pannels, the VSAT antenna, the seismometer vault (green colour cover at the left side) and the geodetic pillar (green colour). At the right side you can see the ancient instrumental house and the solar pannel of the ancient seismic station (out of the fence).