Seismology

Objectives and Equipment

The IST Seismology Lab has two main lines of activity:

  •  Seismic monitoring;
  •  Hazard assessment.

The lab is a research infrastructure of C4G – Collaboratory for Geosciences, a consortium included in the National Roadmap of Research Infrastructures of Strategic Interest. The lab is listed on RIDE, the research infrastructure database of EPOS – the European Plate Observing System.

 Seismic monitoring

The IST Seismology Lab operates a very-broadband seismographic network –NAVIGATORS – and a broadband seismographic network – TAGUSNET, both equipped with real time telemetry.

The aim of the NAVIGATORS network is to improve the seismic coverage of the southwestern region of Iberia and the Azores Gibraltar plate boundary.  The NAVIGATORS network is composed of four seismic stations, two located in Mainland Portugal, one in South Morocco and one in Madeira Island. The stations are equipped with STS-2 seismometers and Quanterra Q330 data loggers.

The aim of the TAGUSNET Network is to contribute to the real-time monitoring of the Lower Tagus Valley Region, near Lisbon. The TAGUSNET Network is composed of 5 stations, equipped with Guralp CMG-40T sensors and Guralp DM24 data loggers. The data centre of the Seismology Laboratory is equipped with a Dell server  (2 Quad-Core Intel Xeon Processors 5400 series) with storage capacity of 146 GB.  The power sources include Standard 670 Watt hot-plug power supply and a redundant 670 Watt power supply.

IST Seismology Lab adheres to the principles of free distribution of data in real time advocated by the Federation of Digital Seismographic Networks. The data are transmitted in real-time in the Seismology laboratory and forwarded to the ORFEUS international data centre.

 Hazard assessment

The IST Seismology Lab has led seismic hazard assessment of Portugal through a series of research projects, both national and European. Presently it hosts the Line of Excellence project SEICHE – Seismicity of Plate Interiors and Challenges to Hazard Assessment. Volcanic risk mitigation and volcanic hazard assessment have also been contemplated through research projects at national and European level, and contract work.

Recent Associated Research Projects

  •  EPOS-PP – European Plate Observing Structure – Preparatory Phase (FP7; PI J. Fonseca, ongoing)
  • SEICHE – Seismicity of plate interiors – challenges to hazard evaluation (FCT – line of excellence; PI J. Fonseca; ongoing)
  • QUAKELOC-PT – Accurate hypocentral relocation in Portugal and continental margin (FCT; PI IST J. Fonseca; ongoing).
  • FINDER – Fault INvestigation with LiDAR for Earthquake (FCT; PI S. Vilanova; ongoing)
  • MIAVITA – Mitigate Impact of volcanic activity in terrain and human activities (FP7; PI IST J. Fonseca; ended in 2013)
  • SHARE – Seismic hazard harmonization for Europe  (FP7; PI IST  J. Fonseca; ended in 2013)
  • MOZART – Mozambique Rift Tomography (FCT; PI J. Fonseca; ended in 2013)
  • SCENE – Site Condition Evaluation for National Seismic Hazard Estimation (FCT; PI S. Vilanova; ended in 2013)
  • RETURN – Rare Earthquake and Tsunami Recurrence (FCT; PI J. Fonseca; ended in 2011)

Recent Consulting Projects on Hazard Assessment 

  •  CVHA – Cape Verde Hazard Assessment (PI J. Fonseca; ongoing)
  •  Peer Review Report to Instituto Geológico Nacional, Madrid, on the Seismic Hazard Map of Spain, (S. Vilanova, ended in 2013).
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