Barcelona ICTJA-CSIC seismic station (ICJA)
Code: CA.ICJA Name: Barcelona ICTJA-CSIC Latitude: 41.3844 N Longitude: 2.1189 E Height: 105 m Local depth: 0 m Owner: Geosciencies Barcelona - CSIC |
| Subsoil features | ||||
|---|---|---|---|---|
| Lithology | Period | Vs30 (m/s) | Classe EC8 | F0 (Hz) |
| Carbonate silts and gravels with a mud-sand matrix | Quaternary | 376 | B | 2.6 |
| Instrumentation by channels and periods | ||||
|---|---|---|---|---|
| Channels | Start date | Sensor type | Digitizer type | Instrumental response |
| HHZ, HHN, HHE | 28/07/2015 | Broadband velocimeter | 24 bits | [StationXML] |
Geophysical characterization
H/V spectral ratio of seismic noise
The H/V spectral ratio from the seismic noise recording at the Barcelona-ICTJA-CSIC seismic station shows a broad peak around 2.6 Hz, which can be linked to the fundamental frequency of the ground; consequently, an acoustic impedance contrast is expected in the subsoil.
H/V Spectral ratio of seismic noise records from Barcelona-ICTJA-CSIC seismic station
S-wave velocity model
The shear-wave (Vs) velocity model, obtained by inverting dispersion curves (using an array technique), reveals a surface layer approximately 7 meters thick with a velocity of about 255 m/s. Below this, the velocity increases progressively with depth. Down to 28 meters, the velocity is 415 m/s, after which it rises to 1150 m/s. This latter layer can be interpreted as the bedrock.
S-waves velocity model of Barcelona-ICTJA-CSIC seismic station