Roquetes seismic station (EROQ) | icgc

Roquetes seismic station (EROQ)

Code: EROQ Name: Roquetes Latitude: 40.82320 N Longitude: 0.40883 E Height: 284 m
Subsoil features
LithologyPeriodVs30 (m/s)EC8 ClassF0 (Hz)
Detrital matherials and calcarenitesUpper Tertiary---
Instrumentation by channels and periods
ChannelsStart dateSensor typeDigitizer typeInstrumental response
SHZ12/02/1987Short period--
SHE, SHN06/11/1991Short period--

The Roquetes seismic station (EROQ) was installed on February 12, 1987 by the National Geographic Institute (IGN) as part of the "National Seismic Network". It is located several kilometres apart of the old EBR seismic station. Collaboration between the OE and the SGC allowed several subsequent improvements until November 1, 2003 when the station was definitively shut down.

 

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Roquetes Seismic Station (EROQ)

Roquetes Seismic Station (EROQ)

 

The waveforms from this seismic station were recorded on thermal paper at the OE. Thanks to the collaboration between the OE and the ICGC, the entire series of thermal paper recordings of this station, preserved in the OE, have been scanned, in grayscale and with a density of 1200dpi.

 

Examples of seismograms from the EROQ seismic station

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Seismogram of May 20-21, 1992

Seismic record of Roquetes (EROQ) analog seismic station for 20-21 May 1992. A record of a teleseism is observed at the top and at the bottom the record of a nuclear explosion in China.

 

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Seismograms on May 19-20, 1990

Seismic record of Roquetes (EROQ) analog seismic station for 20-21 May 1992. A record of a teleseism is observed at the top and at the bottom the record of a nuclear explosion in China.

 

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Seismogram of February 20-21, 1988

Seismic record of Roquetes (EROQ) analog seismic station for 20-21 May 1988. A swarm of earthquakes ocurred near la Seu d'Urgell is observed.