Details

Autor(en) / Beteiligte

• De Plaen, Raphael S. M.
• Lecocq, Thomas
• Caudron, Corentin
• Ferrazzini, Valérie
• Francis, Olivier

Titel

Single‐station monitoring of volcanoes using seismic ambient noise

Ist Teil von

• Geophysical research letters, 2016-08, Vol.43 (16), p.8511-8518

Ort / Verlag

Washington: John Wiley & Sons, Inc

Erscheinungsjahr

2016

Quelle

Wiley Online Library - AutoHoldings Journals

Beschreibungen/Notizen

• Seismic ambient noise cross correlation is increasingly used to monitor volcanic activity. However, this method is usually limited to volcanoes equipped with large and dense networks of broadband stations. The single‐station approach may provide a powerful and reliable alternative to the classical “cross‐station” approach when measuring variation of seismic velocities. We implemented it on the Piton de la Fournaise in Reunion Island, a very active volcano with a remarkable multidisciplinary continuous monitoring. Over the past decade, this volcano has been increasingly studied using the traditional cross‐correlation technique and therefore represents a unique laboratory to validate our approach. Our results, tested on stations located up to 3.5 km from the eruptive site, performed as well as the classical approach to detect the volcanic eruption in the 1–2 Hz frequency band. This opens new perspectives to successfully forecast volcanic activity at volcanoes equipped with a single three‐component seismometer. Key Points Volcanic monitoring with seismic noise cross‐correlation techniques can be achieved with a single three‐component seismic station The single station cross component approach provides more stable results than autocorrelation Environmental perturbations have a different signature from volcanic perturbations and can therefore be discriminated