Permanent, seasonal, and episodic seismic sources around Vatnajökull, Iceland from the analysis of correlograms

Main Article Content

Sylvain Nowé
https://orcid.org/0000-0002-4458-228X
Thomas Lecocq
https://orcid.org/0000-0002-4988-6477
Corentin Caudron
https://orcid.org/0000-0002-3748-0007
Kristín Jónsdóttir
https://orcid.org/0000-0003-0589-929X
Frank Pattyn
https://orcid.org/0000-0003-4805-5636

Abstract

In this study, we locate and characterise the main seismic noise sources in the region of the Vatnajökull icecap (Iceland). Vatnajökull is the largest Icelandic icecap, covering several active volcanoes. The seismic context is very complex, with glacial and volcanic events occurring simultaneously and the classification between the two can become cumbersome. Using seismic interferometry on continuous seismic data (2011–2019), we calculate the propagation velocities and locate the main seismic sources by using hyperbolicas geometry and a grid-search method. We identify and characterise permanent oceanic sources, seasonal glacial-related sources, and episodic volcanic sources. These results give a better understanding of the background seismic noise sources in this region and could allow the identification of seismic sources associated with potentially threatening events in real-time.

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How to Cite
Nowé, S., Lecocq, T., Caudron , C. ., Jónsdóttir, K. and Pattyn , F. (2021) “Permanent, seasonal, and episodic seismic sources around Vatnajökull, Iceland from the analysis of correlograms”, Volcanica, 4(2), pp. 135–147. doi: 10.30909/vol.04.02.135147.
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Articles
Author Biographies

Thomas Lecocq, Royal Observatory of Belgium, Avenue circulaire 3, 1180 Brussels, Belgium

Department of seismology and gravimetry

Kristín Jónsdóttir, Icelandic Meteorological Office, IS-150 Reykjavík, Iceland

Warning – Forecasting department

Frank Pattyn , Université Libre de Bruxelles, B-1050 Brussels, Belgium

Department "Laboratoire de Glaciologie"