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Ebre seismic station (EBR)

Code: EBR Name: Ebre Latitude: 40.820167 N Longitude: 0.493940 E Height: 36 m

Subsoil features

Lithology

Period

Vs30 (m/s)

EC8 Class

F0 (Hz)

-

-

-

-

-

Instrumentation by channels and periods

Channels

Start date

Sensor type

Digitizer type

Instrumental response

See components

1904

See instrument

-

-

The Ebre seismic station (EBR), installed in 1904 and owned by the Observatori de l'Ebre (OE), is the first seismic station in Catalonia and still active. As the technology has been progressing, the instruments have been updated and nowadays it is still in operation thanks to the collaboration between the OE and the ICGC.

Over the years, the OE has accumulated long series of analog seismograms of the EBR seismic station. It is of common interest for both institutions to preserve and disseminate this heritage and for this reason have begun actions to transfer the recordings to digital form.

At the moment, the scanning of records on smoke paper from Grablovitz seismograph (the first one available to the Observatory) and the Teledyne and Sprengnether photo recording instruments, which became operational in 1966, is ongoing. The following table presents a complete list of analog seismographs of the Ebre seismic station (EBR) and their main characteristics. You can  check the details of the available scanned recordings selecting, in the table, the name of the instrument.

Instrument

Components

Period (years)

Mass (Kg)

Grablovitz

NW-SE/NE-SW

1904-1918

12

Vicentini vertical

Z

1904-1936

50

Microsismograph Vicentini

N-S

1904-1916

100

E-W

1904-1928

100

Mainka Ebre

N-S

1914-1941

1501

Mainka Ebre

E-W

1914-1938

157

Vertical pendulum Ebre

NE-SW, NW-SE

1914-1915

316

Vertical pendulum Ebre

N-S

1915-1941

316

Mainka Ebre

N-S

1942-1966

1500

Mainka Ebre

E-W

1942-1966

1500

Vertical pendulum

N-S

1943-1961

635

Zenithal pendulum

Z

1961-1966

635

Geotech 4681A

Z

1966-1974

15

Geotech 6102A

N-S

1966-1974

14.7

Geotech 6102A

E-W

1966-1974

14.7

Sprengnether S-5000V

Z

1969-1974

11.2

Sprengnether S-5000H

N-S

1968-2000

10.7

Sprengnether S-5000H

E-W

1968-2000

10.7

Sprengnether S-5000V

Z

1974-2000

11.2

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