Reactivating and Calming Volcanoes: The 2015 MW 8.3 Illapel Megathrust Strike

Farías, Cristian; Basualto, Daniel

doi:10.1029/2020gl087738

Cited by 23 publications

(30 citation statements)

References 49 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Hydrothermal system triggering. Hydrothermal and geothermal systems have been observed to be extremely sensitive to earthquakes and dynamic stresses in particular 6,15,41,51,52,54,90,[120][121][122][123][124][125][126][127][128][129][130][131][132] . Hydrothermal systems are also generally well connected to the underlying magmatic reservoir 133,134 , hence destabilization may lead to a top-down depressurization of the entire magmatic system, and eventually magmatic eruption 4,15,135-138 (Fig.…”

Section: Triggering Mechanismsmentioning

confidence: 99%

“…Dynamic stresses may also enhance or reduce permeability by opening, closing or shearing cracks 15,132,141,[161][162][163] . Opening new cracks or widening already existing ones increases permeability whereas other fractures with less favourable orientations would be closed and hence decrease permeability.…”

Section: Triggering Mechanismsmentioning

confidence: 99%

“…We focus on two possible cases: strong and moderate PGVs. We adopt the criterion that strong PGVs may produce a magmatic response, whereas moderate PGVs only affect hydrothermal systems 15,132 (and implicitly assume that there may exist very weak PGVs that do not trigger any response). This choice is motivated by field observations that hydrothermal systems are triggered by much smaller dynamic stresses than magmatic systems 6,15,51,59,60,195 .…”

Section: Earthquakesmentioning

confidence: 99%

“…If the magma already contains bubbles, then reduced compression could result in overpressure 76 , 77 . Additionally, extension favours strike-slip faulting and increased permeability 78 , 79 , thus allowing increased advection of magmatic fluids and melt 15 , 78 .

Fig.…”

Section: Triggering Mechanismsmentioning

confidence: 99%

“…Latter 12 already noted in 1971 that “the process is neither universal nor invariable”. Besides, earthquakes may even inhibit volcanic activity in some conditions 9 , 13 – 15 . Hence, can we identify and classify volcanoes based on their sensitivity to seismic-triggering mechanisms?…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

A review framework of how earthquakes trigger volcanic eruptions

et al. 2021

View full text Add to dashboard Cite

It is generally accepted that tectonic earthquakes may trigger volcanic activity, although the underlying mechanisms are poorly constrained. Here, we review current knowledge, and introduce a novel framework to help characterize earthquake-triggering processes. This framework outlines three parameters observable at volcanoes, namely magma viscosity, open- or closed-system degassing and the presence or absence of an active hydrothermal system. Our classification illustrates that most types of volcanoes may be seismically-triggered, though require different combinations of volcanic and seismic conditions, and triggering is unlikely unless the system is primed for eruption. Seismically-triggered unrest is more common, and particularly associated with hydrothermal systems.

show abstract

Section: Triggering Mechanismsmentioning

confidence: 99%

Section: Triggering Mechanismsmentioning

confidence: 99%

Section: Earthquakesmentioning

confidence: 99%

Fig.…”

Section: Triggering Mechanismsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

A review framework of how earthquakes trigger volcanic eruptions

et al. 2021

View full text Add to dashboard Cite

show abstract

Mud Volcanoes

Wang

Manga

2021

Lecture Notes in Earth System Sciences

View full text Add to dashboard Cite

The eruption of mud and magma can be influenced by earthquakes and reports date back more than 2000 years. Dozens of examples of eruptions have now been documented in response to both static and dynamic stresses from earthquakes. Already erupting systems are most sensitive to earthquakes compared to initiating new eruptions. Multiple plausible mechanisms have been proposed for triggering eruptions including disrupting particle-rich materials, mobilizing bubbles, or changing permeability—changes may occur both within and outside the reservoir hosting the materials that ultimately erupt. Using historical examples of triggered mud eruptions, we explain why it is unlikely that the Sidoarjo mud flow (sometimes nicknamed “Lusi”) was initiated by an earthquake. As multiparameter monitoring of volcanoes expands, it may eventually be possible to identify triggering mechanisms and how seismic waves influence magma and mud mobility in field settings.

show abstract

Modulation of Popocatépetl’s activity by regional and worldwide earthquakes

et al. 2022

View full text Add to dashboard Cite

Volcanoes switching from quiescence to eruption shortly after catastrophic earthquakes have raised interest for volcanic triggering and the influence of earthquakes on volcanic activity. Its influence on already active systems and especially at open-vent volcanoes is more difficult to apprehend. A number of recent observations suggest an influence of tectonic earthquakes on Popocatépetl’s activity, the importance of which remains unknown. To further investigate this, we introduce an index, based on the near-field concept, identifying the earthquakes with the highest potential to promote volcanic activity (hereafter termed “significant earthquakes”). The time series of significant earthquakes is compared with the intensity of the volcanic activity, as characterized by the number and energy of volcano-tectonic earthquakes, the number of dome extrusions, the intensity of thermal and degassing fluxes, and ash production. Three main periods with contrasting activity stand out showing that Popocatépetl presents intense activity when significant tectonic earthquakes are frequent. Enhanced extrusion apparently follows significant earthquakes quickly with pulses of dome extrusion that peak after 1.3 ± 0.3 years. Conversely, extrusive activity vanishes when significant seismicity disappears, as during the period 2003–2011, which coincides with a 12-year-long significant seismicity gap. Hence, we propose that the 1994–2022 open-vent activity at Popocatépetl is in part modulated by the repetitive occurrence of significant earthquakes that periodically promote volcanic activity.

show abstract

Reactivating and Calming Volcanoes: The 2015 M_W 8.3 Illapel Megathrust Strike

Cited by 23 publications

References 49 publications

A review framework of how earthquakes trigger volcanic eruptions

A review framework of how earthquakes trigger volcanic eruptions

Mud Volcanoes

Modulation of Popocatépetl’s activity by regional and worldwide earthquakes

Contact Info

Product

Resources

About