Welcome to the ISEV (Informació Sísmica En Viu) system web page of the Secció de Sismologia de l'Observatori Fabra. This web page is part of a cooperation agreement between the Departament d’Astronomia i Meteorologia (DAM) of the Universitat de Barcelona (UB), the Observatori Fabra of the Reial Acadèmia de Ciències i Arts de Barcelona (RACAB) and the Laboratori d'Estudis Geofísics "Eduard Fontserè (LEGEF) of the Institut d'Estudis Catalans.

This web page allow to visualize in near-real time the waveforms of the seismic stations FBR (Observatori Fabra) and FONT (Fontmartina, Montseny). The plots are presented in a similar way than these presented by the helicoidal drums always present in seismic observatories. Plots are updated every 20 minutes approximately. The representation displays the short period (optimal for local events) and long period (optimal for teleseisms) graph of the broadband station FBR and the vertical component of station FONT (intermediate period). Data for previous days are also available.

As a part of the research done at the LEGEF and the DAM, both data and the recording systems are quality controlled QC by means of an automatic data analysis procedure running over every channel.

As a complement, this web page also contains special event related web pages jointly with their corresponding waveforms as recorded in the Observatori Fabra, as well as some public information. The criteria to select these special events is to highlight earthquakes that have had a great effect on a population or have some special significance in the case of local seismicity in Catalonia.

OBSERVATORI FABRA

"Observatori Fabra" of the "Reial Academia de Ciències i Arts de Barcelona"

Location: FBR (Observatori Fabra)           Latitude: 41.4184 N           Longitude: 2.1239 E           Elevation: 408 m FONT (Fontmartina, Montseny)           Latitude: 41.7622 N           Longitude: 2.4338 E           Elevation: 963 m

Instrumentation FBR:

          Sensor Type: Geotech KS-2000
          Data Acquisition System: EarthData PS624
          Data format: miniSEED
          Record mode: Continuous three component, channels HH, BH, LH, VH
          In operation since January 12, 2002 (SP); January 15, 2004 (BB)

Site description FBR:

The Observatori Fabra is placed in the southern side of the Tibidabo mountain in Barcelona. The seismic sensors site is located in the underground in a specifically built in pilar.

Instrumentation FONT:

          Sensor Type: Geotech GS-13
          Data Acquyisition System: NMX RD3-16
          Data format: miniSEED
          Record mode: Continuous, three component, channels EH at 80 Hz
          In operation (digital) since Abril 14, 2004

Site description FONT:

The seismic station Fontmartina is placed in the Montseny mountain. The seismic sensors are located in an specifically designed pilar. Signals are transmitted by radio telemetry to the Observatori Fabra where the acquisition system is placed.

Data Management:

The acquisition systems are located in the observatory. Ground motion measurements are recorded in continuous mode using SeisComP and stored at the local server. Data is extracted and it is qua-controlled periodically by means of the main seismic server of the Departament d'Astronomia i Meteorologia (DAM) of the Universitat de Barcelona (UB).

Contact information:

• Departament d'Astronomia i Meteorologia, Universitat de Barcelona.
  Grup de Física de la Terra
  Diagonal, 647, 7th floor, 08028 Barcelona.
  Phone: (+34)934021122
  Fax: (+34)934021133.



• Reial Acadèmia de Ciències i Arts de Barcelona.
  Rambles, 115, 1st floor, 08001, Barcelona.
  Phone: (+34)933170536