1989–1995 Earthquake sequences in the Galeras volcano region, SW Colombia, and possible volcano–earthquake interactions

Jiménez, M. J.; Garcı́a-Fernández, Mariano; Romero, J.

doi:10.1016/j.tecto.2008.09.004

Cited by 5 publications

(1 citation statement)

References 44 publications

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“…Seismic and volcanic activities are related phenomena [2][3][4][5][6][7][8][9][10]. Consequently, natural volcanic wastes (pumice powder (PP) and volcanic ash (VA)) belong to the landscape of seismic areas.…”

Section: Introductionmentioning

confidence: 99%

Using Natural Raw Materials and CEM Approach for the Design of Andean Volcanic Self-Compacting Concretes

2022

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Volcanic activity is characteristic of seismic zones. Consequently, volcanic material form part of the landscape in places where earthquakes are common natural phenomena. As volcanic wastes (VW) show pozzolanic activity, the substitution of manufactured Portland cement (PC) with VW is clearly a desirable option not only from an economical point of view but also to reduce the CO2 fingerprint. Therefore, designing concretes with volcanic Portland cements (VPC) clearly contributes to cleaner cement production. Construction and building activities in seismic zones need to use a specific kind of concrete—self-compacting concrete (SCC). The challenge we focused on was the design of SCC using VPC. The flow behavior of SCC is characterized by low yield stress, high plastic viscosity, and shear-thickening behavior at high shear. However, obtaining these striking properties of the concrete is not easy with traditional concrete flow tests (Abrams cone, etc.). Moreover, these methods are very costly in terms of time and material. An alternative that allows us to use absolute rheometry and which has been little explored consists in the substitution of concrete by an equivalent mortar. The so-named concrete equivalent mortar (CEM) approach was used in this study to obtain SCC formulations with VPC. Mini cone tests confirmed the absence of blend in some selected CEM formulations based upon the accomplishment of the criteria for SCC. Three concrete proposals were inferred from the respective CEM formulations. They adapted to the SCC European standard according to the Abrams cone spread test.

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Section: Introductionmentioning

confidence: 99%

Using Natural Raw Materials and CEM Approach for the Design of Andean Volcanic Self-Compacting Concretes

2022

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Co-eruptive subsidence at Galeras identified during an InSAR survey of Colombian volcanoes (2006–2009)

Parks

Biggs

Mather

et al. 2011

Journal of Volcanology and Geothermal Research

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Volcano-tectonic earthquakes: A new tool for estimating intrusive volumes and forecasting eruptions

White

McCausland

2016

Journal of Volcanology and Geothermal Research

188

172

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Additional cases are recognized at frequently active volcanoes including Popocateptl (2001) and Mauna Loa (1984. We present four case studies (Pinatubo, Soufriere Hills, Unzen, and Tacana') in which we demonstrate the above mentioned VT characteristics prior to eruptions. Using regional data recorded by NEIC, we recognized in near-real time that a huge distal VT swarm was occurring, deduced that a proportionately huge magmatic intrusion was taking place beneath the long dormant Sulu Range, New Britain Island, Papua New Guinea, that it was likely to lead to eruptive activity, and warned Rabaul Volcano Observatory days before a phreatic eruption occurred. This confirms the value of this technique for eruption forecasting. We also present a counter-example where we deduced that a VT swarm at Volcan Cosiguina, Nicaragua, indicated a small intrusion, insufficient to reach the surface and erupt. Finally, we discuss limitations of the method and propose a mechanism by which this distal VT seismicity is triggered by magmatic intrusion.

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1989–1995 Earthquake sequences in the Galeras volcano region, SW Colombia, and possible volcano–earthquake interactions

Cited by 5 publications

References 44 publications

Using Natural Raw Materials and CEM Approach for the Design of Andean Volcanic Self-Compacting Concretes

Using Natural Raw Materials and CEM Approach for the Design of Andean Volcanic Self-Compacting Concretes

Co-eruptive subsidence at Galeras identified during an InSAR survey of Colombian volcanoes (2006–2009)

Volcano-tectonic earthquakes: A new tool for estimating intrusive volumes and forecasting eruptions

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