Continuous subsidence associated with the long-lasting eruption of Arenal Volcano (Costa Rica) observed by dry-tilt stations

Mora, Mauricio M.; Lesage, Philippe; Albino, F.; Soto, Gerardo J.; Alvarado, Guillermo E.

doi:10.1130/2013.2498(03)

Cited by 4 publications

(20 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…We limit the extent of the output velocity field using a threshold of the combined rms on the north, east and up components set at 1 σ < 5 cm, as well as the limit of the InSAR coverage. The deformation pattern at Arenal volcano presented here is much more complex than described by previous papers (Ebmeier et al 2010;Avard et al 2012;Feng et al 2012;Mora et al 2013), yet still in agreement with them. Fig.…”

Section: Spatial and Temporal Integrationsupporting

confidence: 92%

“…They disregard most of these as primary mechanism and suggest that the mechanism causing the observed ground deformation is a gravity driven instability. Mora et al (2013) used a dry-tilt network around the volcano between 1986 and 2000 that showed a tilt toward the edifice, they reproduced the observed tilt data by loading the weight of the 1988-2000 emplaced lava field on an elastic basal layer. The addition of the deflation of a shallow-seated magma reservoir did not improve the quality of the fit to the observations.…”

Section: Arenal Volcanomentioning

confidence: 90%

“…The accuracy of the InSAR is estimated at ∼36 mm yr −1 while the integrated 3-D deformation surface results in an accuracy better than 25 mm yr −1 . When GPS and dry tilt (Feng et al 2012;Mora et al 2013) are used alone, it results in a low spatial coverage, because the volcanic activity prevents the installation of such equipment higher on the flanks. Both tacheometry (Avard et al 2012) and InSAR suffer from the lack of an absolute reference and they cannot discriminate whether the flank, the foot of the volcano or both are moving.…”

Section: Improvements Of the Methodologymentioning

confidence: 99%

“…Arenal has been showing continuous deformation for decades (Ebmeier et al 2010;Avard et al 2012;Feng et al 2012;Mora et al 2013). Ebmeier et al (2010) analysed InSAR data between 2005 and 2009 and found a steady subsidence of the western flank of the edifice with a maximum rate of 70 mm yr −1 increasing from the foot of the edifice to about half way up the edifice, see Fig.…”

Section: Arenal Volcanomentioning

confidence: 99%

“…The second section describes the new workflow and methodology. The third section describes the application to Arenal volcano where flank motion has been constant for the last few decades (Ebmeier et al 2010;Avard et al 2012;Feng et al 2012;Mora et al 2013) and geodetic techniques have been individually deployed. Finally, we discuss how the methodology can be extended to other measurement techniques and the mechanism that may be responsible for the deformation at Arenal volcano.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Integrated velocity field from ground and satellite geodetic techniques: application to Arenal volcano

Muller¹,

Potro

Biggs³

et al. 2014

Geophysical Journal International

View full text Add to dashboard Cite

S U M M A R YMeasurements of ground deformation can be used to identify and interpret geophysical processes occurring at volcanoes. Most studies rely on a single geodetic technique, or fit a geophysical model to the results of multiple geodetic techniques. Here we present a methodology that combines GPS, Total Station measurements and InSAR into a single reference frame to produce an integrated 3-D geodetic velocity surface without any prior geophysical assumptions. The methodology consists of five steps: design of the network, acquisition and processing of the data, spatial integration of the measurements, time series computation and finally the integration of spatial and temporal measurements. The most significant improvements of this method are (1) the reduction of the required field time, (2) the unambiguous detection of outliers, (3) an increased measurement accuracy and (4) the construction of a 3-D geodetic velocity field. We apply this methodology to ongoing motion on Arenal's western flank. Integration of multiple measurement techniques at Arenal volcano revealed a deformation field that is more complex than that described by individual geodetic techniques, yet remains consistent with previous studies. This approach can be applied to volcano monitoring worldwide and has the potential to be extended to incorporate other geodetic techniques and to study transient deformation.

show abstract

Section: Spatial and Temporal Integrationsupporting

confidence: 92%

Section: Arenal Volcanomentioning

confidence: 90%

Section: Improvements Of the Methodologymentioning

confidence: 99%

Section: Arenal Volcanomentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Integrated velocity field from ground and satellite geodetic techniques: application to Arenal volcano

Muller¹,

Potro

Biggs³

et al. 2014

Geophysical Journal International

View full text Add to dashboard Cite

show abstract

Evolution and dynamics of the open-vent eruption at Arenal volcano (Costa Rica, 1968–2010): what we learned and perspectives

et al. 2022

Self Cite

View full text Add to dashboard Cite

On 29 July 1968, there was a violent reactivation of Arenal volcano. The resulting westward-directed lateral blast eruption left two villages destroyed and 78 people dead. The activity continued as a long-lasting, open-vent eruption that evolved into seven recognisable phases reflecting changes in magma supply, explosive activity and cone evolution, and ended in October 2010. Here, we review this activity, the geophysical approaches applied to understanding it and the open questions resulting from these insights. The eruptive dynamics were characterised by almost constant lava effusion, degassing, strombolian and vulcanian explosions and infrequent pyroclastic density currents. In this study, the total rock dense equivalent volume of lava and tephra erupted is calculated at 757 ± 77 Mm3, while the volume of the lava flow field is 527 ± 58 Mm3. Typical seismic activity included harmonic and spasmodic tremors, long-period events and explosion signals with frequent audible “booms”. The decline of the eruptive activity started in 2000, with a decrease in the number and size of explosive events, a shift from long to short lava flows along with the collapse of lava flow fronts and the subsequent formation of downward-rolling lava block aprons, the frequent growth of dome-like structures on the summit and a gradual decrease in seismic energy. Multiple geological and geophysical studies during this 42-year-long period of open-vent activity at Arenal resulted in many advances in understanding the dynamics of andesitic blocky lava flows, the origin and diversity of pyroclastic density currents and seismic sources, as well as the role of site effects and rough topography in modifying the seismic wavefield. The acoustic measurements presented here include two types of events: typical explosions and small pressure transients. Features of the latter type are not usually observed at volcanoes with intermediate to evolved magma composition. Explosions have different waveforms and larger gas volumes than pressure transients, both types being associated with active and passive degassing, respectively. This body of data, results and knowledge can inform on the type of activity, and associated geophysical signals, of open-vent systems that are active for decades.

show abstract

Volcano hazard and surveillance in Costa Rica

Avard¹,

Mora²,

Bakkar

et al. 2021

Volcanica

View full text Add to dashboard Cite

Costa Rica hosts ten volcanic complexes and is highly tectonically active due to its location at the interaction between the Cocos, Nazca, and Caribbean plates and the Panama microplate. Three of the five historically active volcanoes had frequent eruptions in 2019. The institutions in charge of monitoring the volcanoes of Costa Rica are the Observatorio Vulcanológico y Sismológico de Costa Rica from Universidad Nacional (OVSICORI-UNA) and the Red Sismológica Nacional (RSN: UCR-ICE that groups the Escuela Centroamericana de Geología from the Universidad de Costa Rica, and the Observatorio Sismológico y Vulcanológico de Arenal y Miravalles from the Instituto Costarricense de Electricidad; acronyms ECG, UCR, OSIVAM, and ICE). These institutions are focused on the most dangerous volcanoes, i.e. those closest to the Great Metropolitan Area (2.2 million inhabitants), which includes San José (the capital), and those near hydroelectrical and geothermal plants. In 2020, those institutions operated a network of. 59 seismic stations on volcanoes, 5 infrasound stations, 25 permanent GPS sites, 2 permanent DOAS, 3 permanent MultiGAS, 13 webcams, and performed systematic analyses in geochemistry and petrology laboratories. Those institutes routinely communicate results with the authorities in charge of crisis management nationally and internationally (Comisión Nacional de Prevención de Riesgos y Atención de Emergencias and Volcanic Ash Advisory Centre, respectively) and are always looking for more scientific collaborations. Costa Rica alberga diez complejos volcánicos y presenta una elevada actividad sísmica debido a su ubicación dentro de un marco tectónico complejo, donde interactúan las placas del Cocos, Nazca, Caribe y la microplaca de Panamá. Tres de los cinco volcanes históricamente activos han tenido frecuentes erupciones durante el 2019. Los institutos que vigilan los volcanes de Costa Rica son el Observatorio Vulcanológico y Sismológico de Costa Rica (OVSICORIUNA) y la Red Sismológica Nacional (RSN: UCR-ICE que agrupa a la Escuela Centroamericana de Geología de la Universidad de Costa Rica y al Observatorio Sismológico y Vulcanológico del Arenal y Miravalles del Instituto Costarricense de Electricidad, acrónimos en orden: ECG, UCR, OSIVAM e ICE). Estos institutos se enfocan principalmente en los volcanes que representan un alto riesgo para la capital San José y la Gran Área Metropolitana, en el centro de Costa Rica (2.2 millones de habitantes), y aquellos cerca de centrales hidroeléctricas y geotérmicas. La vigilancia se apoya en una red de 59 estaciones sísmicas, 5 medidores de infrasonido, 25 sitios GPS permanentes, 2 DOAS, 3 MultiGAS permanentes, 13 cámaras web y análisis sistemático de muestras en los laboratorios de geoquímica y petrología. Estas instituciones comunican sus resultados de forma rutinaria a las autoridades a cargo de la gestión de peligros nacionales e internacionales (Comisión Nacional de Prevención de Riegos y Atención de Emergencias y Volcanic Ash Advisory Centre, respectivamente), y permanecen en la búsqueda permanente de colaboraciones científicas.

show abstract

Continuous subsidence associated with the long-lasting eruption of Arenal Volcano (Costa Rica) observed by dry-tilt stations

Cited by 4 publications

References 25 publications

Integrated velocity field from ground and satellite geodetic techniques: application to Arenal volcano

Integrated velocity field from ground and satellite geodetic techniques: application to Arenal volcano

Evolution and dynamics of the open-vent eruption at Arenal volcano (Costa Rica, 1968–2010): what we learned and perspectives

Volcano hazard and surveillance in Costa Rica

Contact Info

Product

Resources

About