Mayon volcano, Philippines: some insights into stress balance

Jentzsch, G.; Haase, Olaf; Kröner, C.; Winter, U. J.

doi:10.1016/s0377-0273(00)00312-7

Cited by 24 publications

(15 citation statements)

References 15 publications

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“…We now compare the tidally induced decompression of the SEC magma conduit to the volatile pressure build‐up related to magma cooling and crystallisation leading to volatile pressurisation. Previous studies elsewhere show that cyclic, tidally induced stress releases as low as some kPa may be at least one order of magnitude larger than average rates of volatile pressure build‐up, which are typically reported as 0.4 × 10 −2 kPa/h at Mayon [ Jentzsch et al , 2001] and 7.2 × 10 −2 kPa/h at Stromboli [ Johnston and Mauk , 1972] volcanoes. A tidal control on magma vesiculation and crystallisation, inducing periodic density variations, was also proposed to explain vertical ground deformations at Poàs volcano [ Rymer and Brown , 1984].…”

Section: Discussionmentioning

confidence: 99%

Effects of tidal stresses on volcanic activity at Mount Etna, Italy

Sottili

Martino

Palladino

et al. 2007

Geophysical Research Letters

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Here we model quantitatively the stress and strain induced by tidal forces as possible triggers of Mount Etna eruptions during 1989, 2000 and 2001, by means of 2D numerical analysis by finite difference method applied to the volcano edifice. Spectral and vectorial analysis of tidal acceleration indicates that the quasi‐diurnal, semi‐diurnal and ter‐diurnal constituents may have induced decompressions up to some kPa in the shallow (i.e., 1,500 m) gas‐saturated magma reservoir, which controlled magma vesiculation and the timing of lava fountain activity from the South East Crater (SEC). We consider the geological heterogeneities in the volcanic edifice (i.e., rock geometries and properties, feeder conduit and vent systems, volcanic landforms), the magma properties (i.e., Bulk modulus, volatile content) and the ongoing volcano‐tectonic stresses (i.e., volcano flank deformations), which strongly influence the response of eruptive activity to tidal forces. Indeed, the tidal factor may act on flank deformation concomitant to shallow magma inflation. The implications of our model may help understand the eruptive behaviour and the disequilibrium state of the volcano and may be useful for hazard assessment at Mount Etna.

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Section: Discussionmentioning

confidence: 99%

Effects of tidal stresses on volcanic activity at Mount Etna, Italy

Sottili

Martino

Palladino

et al. 2007

Geophysical Research Letters

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“…Stress changes modulated by the LOD centrifugal forces-and estimated of the order of~400 kPa/year (Sottili et al, 2015)-have been reported to produce crustal deformations on multiyear scale (Wang et al, 2000). Active volcanoes are sensitive to other periodic crustal stress changes occurring over different timescales (see Table S2), as also reported for volcanoes along the "Ring of Fire" (Rymer & Brown, 1984;Kasahara et al, 2001;Palladino & Sottili, 2014); Stromboli, Italy (Johnston & Mauk, 1972;Sottili & Palladino, 2012); Kilauea, Hawaii (Brown, 1925;Dzurisin, 1980); Mayon, Philippines (Jentzsch et al, 2001); Ruapehu, New Zealand (Girona et al, 2018); and Mount Etna (Patanè et al, 1994;Sottili et al, 2007). Active volcanoes are sensitive to other periodic crustal stress changes occurring over different timescales (see Table S2), as also reported for volcanoes along the "Ring of Fire" (Rymer & Brown, 1984;Kasahara et al, 2001;Palladino & Sottili, 2014); Stromboli, Italy (Johnston & Mauk, 1972;Sottili & Palladino, 2012); Kilauea, Hawaii (Brown, 1925;Dzurisin, 1980); Mayon, Philippines (Jentzsch et al, 2001); Ruapehu, New Zealand (Girona et al, 2018); and Mount Etna (Patanè et al, 1994;Sottili et al, 2007).…”

Section: Introductionmentioning

confidence: 76%

Is There an Influence of the Pole Tide on Volcanism? Insights From Mount Etna Recent Activity

Lambert

Sottili

2019

Geophysical Research Letters

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We investigate a possible link between polar motion and (i) seismic energy release and (ii) timing and intensity of eruptions at Mount Etna (Italy) for which a dense observational database is available. Our study suggests that the seismicity around Mount Etna increases during the largest excursions of the Earth rotation pole, which result from the constructive interference of the climate-driven seasonal and Chandler wobbles. To a lesser extent, a similar link is detected between the pole tide and the erupted volume of magma. We infer that, by creating periodic changes in the state of stress in the crust through a variable centrifugal force and a periodic vertical displacement (pole tide), variations in polar motion influence eruption timing and magnitude and the rate of seismic energy release from volcanoes. This study provides new evidences on the sensitivity of volcanoes to external forcing. Plain Language SummaryThe Earth surface is continuously deformed by a wide range of phenomena including lunisolar tides and centrifugal forces due to changes in the Earth's rotation rate and in the direction of its rotation axis. The latter class of deformations is typically of a centimeter on interannual timescales. On another side, some volcanoes appear to be sensitive to small perturbations of the crustal stress. We detected similar variability in the centrifugal forces arising from the Earth's rotation axis direction variability and Mount Etna seismicity and erupted magma volume. This suggests that the variation of the Earth's rotation axis direction plays a significant role as modulator of the activity of Mount Etna.

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“…As the ocean loading tide around the Philippines varies strongly, it is proposed that there may be a triggering of volcano seismicity by the strain induced . FE-modelling proves that during a critical phase the pressure increase in the vent due to cooling/crystallization is in the same order as the tidal stress (JENTZSCH et al, 2001b). The lava shows cyclical variation with basaltic and andesitic flows (NEWHALL, 1977(NEWHALL, , 1979.…”

Section: Mayon/philippinesmentioning

confidence: 83%

Gravity Changes and Internal Processes: Some Results Obtained from Observations at Three Volcanoes

Jentzsch

Weise

Rey

et al. 2004

Pure and Applied Geophysics

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Temporal gravity changes provide information about mass and/or density variations within and below the volcano edifice. Three active volcanoes have been under investigation; each of them related to a plate boundary: Mayon/Luzon/Philippines, Merapi/Java/Indonesia, and Galeras/Colombia. The observed gravity changes are smaller than previously expected but significant. For the three volcanoes under investigation, and within the observation period, mainly the increase of gravity is observed, ranging from 1,000 nm )2 to 1,600 nms )2 . Unexpectedly, the gravity increase is confined to a rather small area with radii of 5 to 8 km around the summit. At Mayon and Merapi the parallel GPS measurements yield no significant elevation changes. This is crucial for the interpretation, as the internal pressure variations do not lead to significant deformation at the surface. Thus the classical Mogi-model for a shallow extending magma reservoir cannot apply. To confine the possible models, the attraction due to changes of groundwater level or soil moisture is estimated along the slope of Merapi exemplarily by 2-D modelling. Mass redistribution or density changes were evaluated within the vent as well as deeper fluid processes to explain the gravity variations; the results are compared to the model incorporating the additional effect of elastic deformation.

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Mayon volcano, Philippines: some insights into stress balance

Cited by 24 publications

References 15 publications

Effects of tidal stresses on volcanic activity at Mount Etna, Italy

Effects of tidal stresses on volcanic activity at Mount Etna, Italy

Is There an Influence of the Pole Tide on Volcanism? Insights From Mount Etna Recent Activity

Gravity Changes and Internal Processes: Some Results Obtained from Observations at Three Volcanoes

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