TY - JOUR
T1 - Remote volcano monitoring using crowd-sourced imagery and Structure-from-Motion photogrammetry
T2 - A case study of Oldoinyo Lengai's active pit crater since the 2007–08 paroxysm
AU - Tournigand, Pierre Yves
AU - Smets, Benoît
AU - Laxton, Kate
AU - Dille, Antoine
AU - France, Lydéric
AU - Chazot, Gilles
AU - Ho, Cristy
AU - Wauthier, Christelle
AU - Nicholson, Emma J.
AU - Kasanzu, Charles Happe
AU - Msechu, Maruvuko
AU - Kervyn, Matthieu
N1 - Funding Information:
The authors want to thank the contribution of Sylvain Chermette from 80 jours voyages and the Société de Volcanologie de Genève (SVG), who provided data for June 2022. We also want to thank Michael Dalton-Smith and Gian Schachenmann from Serengeti Films and Kicheche Natural History Unit, for providing us data for January 2021. We want to thank Patrick Marcel, Regis Etienne and Marc Caillet from the SVG for providing data covering August 2018 and February 2019. Finally, the authors want to thank Benoit Wilhelmi, Ben Beeckmans, David Sherrod and Franck Mockel for providing pictures of OL crater for 2008, 2009, 2010 and 2012, respectively. PYT acknowledges the support of the Research Foundation Flanders (FWO), through the MORPHEUS postdoc project (grant FWOTM996). BS was supported by the GuiDANCE project (Belgian Science Policy Office, FED-tWIN Programme, Grant Prf-2019-066). KL and EJN acknowledge funding for the July 2019 expedition through the Alfred P. Sloan Foundation's support of the Deep Carbon Observatory Deep Earth Carbon Degassing program (DECADE). CW and CH acknowledge the support from the National Science Foundation (NSF) CAREER EAR 1945417 and EAR 1923943. We also thank the Tanzania Commission for Science and Technology (COSTECH) for field permits and all the guides and porters for their help during field work. LF & GC acknowledge the support of the French National Research Agency through the national program “Investissements d'avenir” with the reference ANR-10-LABX-21-01/LABEX RESSOURCES21, and through the project GECO-REE (ANR-16-01–0003CE-01). This is CRPG contribution number 2850 and GECO-REE contribution number 8.
Funding Information:
The authors want to thank the contribution of Sylvain Chermette from 80 jours voyages and the Société de Volcanologie de Genève (SVG), who provided data for June 2022. We also want to thank Michael Dalton-Smith and Gian Schachenmann from Serengeti Films and Kicheche Natural History Unit, for providing us data for January 2021. We want to thank Patrick Marcel, Regis Etienne and Marc Caillet from the SVG for providing data covering August 2018 and February 2019. Finally, the authors want to thank Benoit Wilhelmi, Ben Beeckmans, David Sherrod and Franck Mockel for providing pictures of OL crater for 2008, 2009, 2010 and 2012, respectively. PYT acknowledges the support of the Research Foundation Flanders (FWO) , through the MORPHEUS postdoc project (grant FWOTM996 ). BS was supported by the GuiDANCE project ( Belgian Science Policy Office , FED-tWIN Programme , Grant Prf-2019-066 ). KL and EJN acknowledge funding for the July 2019 expedition through the Alfred P. Sloan Foundation's support of the Deep Carbon Observatory Deep Earth Carbon Degassing program (DECADE) . CW and CH acknowledge the support from the National Science Foundation (NSF) CAREER EAR 1945417 and EAR 1923943 . We also thank the Tanzania Commission for Science and Technology (COSTECH) for field permits and all the guides and porters for their help during field work. LF & GC acknowledge the support of the French National Research Agency through the national program “Investissements d'avenir” with the reference ANR-10-LABX-21-01/LABEX RESSOURCES21, and through the project GECO-REE (ANR-16-01–0003CE-01). This is CRPG contribution number 2850 and GECO-REE contribution number 8.
Publisher Copyright:
© 2023 Elsevier B.V.
PY - 2023/11
Y1 - 2023/11
N2 - Active volcanic craters are highly dynamic geological features that undergo morphological changes on a broad range of spatial and temporal scales. Such changes have implications for the stability of the edifice, the eruptive style and the associated hazards. However, monitoring the morphological evolution of active craters at high spatial resolution and over long periods of time can be challenging, especially at remote volcanoes. In this study, we demonstrate the potential of Structure-from-Motion Multi-View Stereo photogrammetry technique based on crowd-sourced data, applied to the case study of Oldoinyo Lengai (OL) volcano in northern Tanzania. Following the 2007–08 paroxysm, OL volcano resumed its characteristic effusive activity and started to fill in with lava the newly-formed 300 m wide and 130 m deep pit crater. Monitoring capability is limited at OL due to its location in a remote non-urbanized area, therefore, the eruptive and morphological evolution is poorly constrained (e.g., lava emission rates, number of vents, location of unstable areas), with hazard implications for tourists visiting the summit area. Here we use crowd-sourced images, including Unoccupied Aircraft System (UAS) images, ground-based videos and pictures collected between October 2014 and June 2022, to reconstruct high-resolution topographic time-series of OL's summit crater. With these data, we have generated 7 Digital Elevation Models (DEMs) of OL's pit crater spanning the past 8 years, and estimated the emitted volume of lava and the corresponding time averaged discharge rates (TADR). From this we characterize the geomorphological evolution of OL pit crater since the 2007–08 paroxysm and perform a preliminary hazard assessment of the crater area. InSAR COSMO-SkyMed and Sentinel-1 data covering the periods 2013–2014 and 2018–2019 were also used in this study to complement our observations. Our results indicate that the main location of lava emission within the crater floor has repeatedly shifted over the years and that the 2008 cone has experienced a subsidence over time. OL's TADR has increased over the years, reaching values one order of magnitude higher in the period 2021–2022 compared to 2014–2018. Assuming similar TADR in the coming years, the crater could be filled in by lava within the next decade, leading to new lava overflows on the flanks of the volcano.
AB - Active volcanic craters are highly dynamic geological features that undergo morphological changes on a broad range of spatial and temporal scales. Such changes have implications for the stability of the edifice, the eruptive style and the associated hazards. However, monitoring the morphological evolution of active craters at high spatial resolution and over long periods of time can be challenging, especially at remote volcanoes. In this study, we demonstrate the potential of Structure-from-Motion Multi-View Stereo photogrammetry technique based on crowd-sourced data, applied to the case study of Oldoinyo Lengai (OL) volcano in northern Tanzania. Following the 2007–08 paroxysm, OL volcano resumed its characteristic effusive activity and started to fill in with lava the newly-formed 300 m wide and 130 m deep pit crater. Monitoring capability is limited at OL due to its location in a remote non-urbanized area, therefore, the eruptive and morphological evolution is poorly constrained (e.g., lava emission rates, number of vents, location of unstable areas), with hazard implications for tourists visiting the summit area. Here we use crowd-sourced images, including Unoccupied Aircraft System (UAS) images, ground-based videos and pictures collected between October 2014 and June 2022, to reconstruct high-resolution topographic time-series of OL's summit crater. With these data, we have generated 7 Digital Elevation Models (DEMs) of OL's pit crater spanning the past 8 years, and estimated the emitted volume of lava and the corresponding time averaged discharge rates (TADR). From this we characterize the geomorphological evolution of OL pit crater since the 2007–08 paroxysm and perform a preliminary hazard assessment of the crater area. InSAR COSMO-SkyMed and Sentinel-1 data covering the periods 2013–2014 and 2018–2019 were also used in this study to complement our observations. Our results indicate that the main location of lava emission within the crater floor has repeatedly shifted over the years and that the 2008 cone has experienced a subsidence over time. OL's TADR has increased over the years, reaching values one order of magnitude higher in the period 2021–2022 compared to 2014–2018. Assuming similar TADR in the coming years, the crater could be filled in by lava within the next decade, leading to new lava overflows on the flanks of the volcano.
KW - Crater morphology
KW - DEM
KW - Monitoring
KW - Oldoinyo Lengai
KW - Photogrammetry
KW - UAS
UR - http://www.scopus.com/inward/record.url?scp=85172368667&partnerID=8YFLogxK
U2 - 10.1016/j.jvolgeores.2023.107918
DO - 10.1016/j.jvolgeores.2023.107918
M3 - Article
AN - SCOPUS:85172368667
VL - 443
JO - Journal of Volcanology and Geothermal Research
JF - Journal of Volcanology and Geothermal Research
SN - 0377-0273
M1 - 107918
ER -