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Accelerometric network

The installation of the first equipments of the ground motion network started in June 1995 with different objectives. Mainly, to record adequately (without saturation) strongs motions, felt by population of the region. Also to carry out the study of the attenuation relationships of the acceleration with distance, the study of the amplification of soils in urban areas and to facilitate the studies of the seismic source for the big earthquakes between others aspects.

Site selection criteria

The main criteria used for site selection are following:
1) zones affected by big earthquakes at the past (the most active zones with seismic zones); ,
2) zones with moderate seismic activity highly populated and/or dangerous industries;
3) sites on different materials, soil and rock, to analyse the amplification of the ground motion.

Equipment

The recording system is digital (at 200 or 100 samples per second) and the equipments are configured to record the three components of the ground motion in a continuous way or also in local recording when the trigger value oscillates on the different sites normally between 0.2x10-3g and 1.5x10-3g.

Main characteristics of the strong motion stations in Catalonia and Andorra are:

Network

Station

Name

Installation date

Lat N (º)

Lon E (º)

Height
(m)

Lithology

Soil type
(EC8 modified)

Owner

CA

AVIN

Avinyó

09/11/2010

41.843810

1.965460

334

Limestones and marls
(Paleogene)

A

ICGC

CA

BAJU

Barcelona - Ciutat Vella

26/02/2009

41.385300

2.174100

25

Alluvial
(Quaternary)

C

ICGC

CA

BAIN

Barcelona - Plaça Tetuan

28/04/2010

41.396000

2.173000

22

Alluvial
(Quaternary)

B'

ICGC

CA

BLAN

Blanes

11/05/2017

41.683943

2.794193

20

Granodiorites and granites
(Paleozoic)

-

ICGC

CA

CELO

Sant Celoni

22/02/2001

41.689600

2.492300

150

Alluvial
(Quaternary)

B'

ICGC

ES

EXQUE

Queralbs

31/07/2019

42.3483

2.1627

1196

Lutites

-

IGN

ES

EXSEU

La Seu d'Urgell

30/07/2019

42.3580

1.4599

707

Gravels and silts

-

IGN

CA

FBR

Observatori Fabra

06/06/1995

41.418390

2.123961

405

Shales
(Paleozoic)

A

IGN*

CA

CGIR

Girona-
Universitat

19/03/2010

41.986000

2.827800

102

Limestone
(Paleogene)

A

ICGC

CA

CGIS

Girona-
Generalitat

21/02/2011

41.980880

2.821580

70

Alluvial
(Quaternary)

B'

ICGC

CA

CGRN

Granollers

24/04/2008

41.607000

2.288400

153

Alluvial
(Quaternary)

B'

ICGC

CA

ILER

Lleida

23/03/2010

41.615300

0.626200

171

Hales and grainstones
(Paleogene)

A

ICGC

CA

CLLI

Llívia - Estació

10/11/1997

42.478109

1.972966

1413

Rhytmites
(Paleozoic)

A

ICGC

CA

LLIS

Llívia - Poliesportiu

27/09/2001

42.462600

1.978300

1198

Alluvial
(Quaternary)

B'

ICGC

CA

CMON

Montserrat

20/10/2015

41.593324

1.836294

730

Conglomerates
(Paleogene)

A

ICGC

CA

MTJR

Montjuïc

11/02/1997

41.370070

2.156080

51

Sandstones
(Miocene)

B'

ICGC

CA

OLOS

Olot

07/06/1995

42.181450

2.489250

436

Basalts
(Quaternary)

A

IGN
ICGC*

CA

REUS

Reus

06/05/2011

41.134825

1.185893

48

Alluvial
(Quaternary)

B'

ICGC

CA

SCOL

Santa Coloma
(Andorra)

01/09/2010

42.493015

1.496256

961

Alluvial
(Quaternary)

C

IEA

CA

CTRM

Tremp

18/04/2013

42.160858

0.893644

440

Sandstones, conglomerates and lutites
(Upper Cretaceous)

A

ICGC

ES

TUNR

Vielha - Túnel

03/07/2002

42.621667

0.765556

1582

Alluvial
(Quaternary)

E

IGN*

CA

VIER

Vielha - Casau

04/07/2002

42.706473

0.786306

1116

Grainstones
(Paleozoic)

A

ICGC

CA

VIES

Vielha - Hospitau

22/10/2004

42.701600

0.796900

986

Alluvial
(Quaternary)

E

IGN
ICGC*

Owner: ICGC, Institut Cartogràfic i Geològic de Catalunya; IGN, Instituto Geográfico Nacional; IEA, Institut d'Estudis Andorrans.
EC8. Joint Research Center Report: Eurocode 8: Seismic Design of Buildings - Worked examples.

Withdrawn equipment

Accelerometer

Code

Installation date

Latitude
(N)

Longitude
(E)

Height
(m)

Lithology

Soil type
(EC8 modified)

Owner

Vielha 1

VIES

09/06/1995

42º 42' 14"

0º 47' 50"

965

Alluvial
(Quaternary)

-

IGN*

Vielha 2

VIER

05/05/1998

42º 41' 53"

0º 47' 48"

1105

Grainstones
(Paleozoic)

-

ICGC

Celoni 2

CELR

20/09/2001
(retirat)
26/06/2008

41º 41' 07"

2º 29' 57"

140

Granite
(Paleozoic)

-

ICGC

Andorra

AND1

10/11/2003
(retirat)
01/07/2007

42º 30' 48''

1º 30' 14''

1078

Marlycalcareous and shales
(Paleozoic)

-

IEA