2016
DOI: 10.5194/se-7-557-2016
|View full text |Cite
|
Sign up to set email alerts
|

Numerical models for ground deformation and gravity changes during volcanic unrest: simulating the hydrothermal system dynamics of a restless caldera

Abstract: Abstract. Ground deformation and gravity changes in restless calderas during periods of unrest can signal an impending eruption and thus must be correctly interpreted for hazard evaluation. It is critical to differentiate variation of geophysical observables related to volume and pressure changes induced by magma migration from shallow hydrothermal activity associated with hot fluids of magmatic origin rising from depth. In this paper we present a numerical model to evaluate the thermo-poroelastic response of … Show more

Help me understand this report
View preprint versions

Search citation statements

Order By: Relevance

Paper Sections

Select...
1
1
1
1

Citation Types

4
34
0

Year Published

2017
2017
2024
2024

Publication Types

Select...
7
1

Relationship

1
7

Authors

Journals

citations
Cited by 26 publications
(38 citation statements)
references
References 73 publications
4
34
0
Order By: Relevance
“…In many cases, unrest does not precede an eruption and it is essential to distinguish baseline levels of activity from the signals that might be precursory to an eruption (e.g. Fournier et al, 2010;Parks et al, 2015;Biggs et al, 2016;Coco et al, 2016). The interaction between magmatic and hydrothermal systems creates complex signals, particularly in terms of the deformation, which make it difficult to interpret the cause of the unrest (e.g.…”
Section: Introductionmentioning
confidence: 99%
“…In many cases, unrest does not precede an eruption and it is essential to distinguish baseline levels of activity from the signals that might be precursory to an eruption (e.g. Fournier et al, 2010;Parks et al, 2015;Biggs et al, 2016;Coco et al, 2016). The interaction between magmatic and hydrothermal systems creates complex signals, particularly in terms of the deformation, which make it difficult to interpret the cause of the unrest (e.g.…”
Section: Introductionmentioning
confidence: 99%
“…For this reason, a viscoelastic rheology provides a reasonable simplification for this geologic setting and was chosen for our model assumptions. Recent studies have shown the important contribution of thermoporoelastic effects in volcanoes with hydrothermal systems (e.g., Coco et al, ; Currenti et al, ; Currenti & Napoli, ; Hurwitz et al, ), which may also induce or partly explain the observed surface deformation at Taal. But including a thermoporoelastic rheology was out of the scope of our study and neglected in our model assumptions, because previous geochemical analysis supports magma recharging of the shallow magma storage region during the 2010–2011 unrest at Taal (Arpa et al, ), which supports inflation of the magma storage region.…”
Section: Discussionmentioning
confidence: 99%
“…1), are scattered in the range between 0.1 and 0.4 (Tommasi et al, 2016). In the lack of in-situ measurements, the values of permeability are set up on the basis of estimates in other similar volcanic environments (Todesco et al 2010, Okubo andKanda, 2011;Rinaldi et al, 2011;Troiano et al, 2011;Coco et al, 2016).…”
Section: Fluid Flow Parametermentioning
confidence: 99%
“…On the basis of literature data (Coco et al, 2016;Rinaldi et al, 2010;Troiano et al, 2011), we chose average values for the volumetric thermal expansion parameter l m , fixed to 10 -5 °C -1 , and for the drained bulk modulus, set to GPa. (Tommasi et al, 2016).…”
Section: Mechanical Parametersmentioning
confidence: 99%