On the shallow volcanic response to remote seismicity

Jolly, Arthur D.

doi:10.1130/focus012019.1

Cited by 3 publications

(5 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Tremor regimes can be persistent over hours to days (e.g., Carniel et al., 2003, Carniel, Barbui, & Jolly, 2013; Carniel, Jolly, & Barbui, 2013; Langer et al., 2011) or weeks to months (e.g., Jaquet & Carniel, 2003; Langer et al., 2009; Unglert & Jellinek, 2017). Besides purely volcanic activity, tremor signals also commonly contain external, nonvolcanic features (e.g., ocean wave patterns), which must be considered when analyzing continuous seismic records (Carniel, 2003; Carniel & Tárraga, 2006; Jolly, 2019; Seropian et al., 2021; Yates et al., 2019).…”

Section: Introductionmentioning

confidence: 99%

Identification of Seismo‐Volcanic Regimes at Whakaari/White Island (New Zealand) Via Systematic Tuning of an Unsupervised Classifier

et al. 2023

View full text Add to dashboard Cite

We present an algorithm based on Self‐Organizing Maps (SOM) and k‐means clustering to recognize patterns in a continuous 12.5‐year tremor time series recorded at Whakaari/White Island volcano, New Zealand (hereafter referred to as Whakaari). The approach is extendable to a variety of volcanic settings through systematic tuning of the classifier. Hyperparameters are evaluated by statistical means, yielding a combination of “ideal” SOM parameters for the given data set. Extending from this, we applied a Kernel Density Estimation approach to automatically detect changes within the observed seismicity. We categorize the Whakaari seismic time series into regimes representing distinct volcano‐seismic states during recent unrest episodes at Whakaari (2012/2013, 2016, and 2019). There is a clear separation in classification results between background regimes and those representing elevated levels of unrest. Onset of unrest is detected by the classifier 6 weeks before the August 2012 eruption, and ca. 3.5 months before the December 2019 eruption, respectively. Regime changes are corroborated by changes in commonly monitored tremor proxies as well as with reported volcanic activity. The regimes are hypothesized to represent diverse mechanisms including: system pressurization and depressurization, degassing, and elevated surface activity. Labeling these regimes improves visualization of the 2012/2013 and 2019 unrest and eruptive episodes. The pre‐eruptive 2016 unrest showed a contrasting shape and nature of seismic regimes, suggesting differing onset and driving processes. The 2016 episode is proposed to result from rapid destabilization of the shallow hydrothermal system, while rising magmatic gases from new injections of magma better explain the 2012/2013 and 2019 episodes.

show abstract

Section: Introductionmentioning

confidence: 99%

Identification of Seismo‐Volcanic Regimes at Whakaari/White Island (New Zealand) Via Systematic Tuning of an Unsupervised Classifier

et al. 2023

View full text Add to dashboard Cite

show abstract

“…Hydrothermal systems sit at a strategic location and constitute a key link between magmatic reservoirs and their environments. As such, it is important to carefully examine their role in eruption triggering 4 , 138 , and in particular, as intermediate between tectonic earthquakes and volcanic eruptions.…”

Section: Discussionmentioning

confidence: 99%

“…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 – 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. 2 ).…”

Section: Triggering Mechanismsmentioning

confidence: 99%

“…2 ). The possibility for hydrothermal systems to form a link between seismic waves and magmatic reservoir destabilization has received little attention under the lens of seismic triggers 4 , 83 , 138 but observations 15 , 34 , 42 , 127 suggest that it could play a major role. The triggering mechanisms of hydrothermal systems generally fall into two categories: change in fluid pressure and change in permeability.…”

Section: Triggering Mechanismsmentioning

confidence: 99%

See 1 more Smart Citation

A review framework of how earthquakes trigger volcanic eruptions

et al. 2021

Self Cite

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

“…Fan et al, 2020). Importantly, experimental results by Namiki et al (2018) show the importance of external seismic waves from large earthquakes driving volcanic edifice resonance and subsequent propagation of variably buoyant cracks (Jolly, 2019). Furthermore, giant lake pockmarks in Switzerland formed by subsurface fluids have been correlated with historical seismicity when the minimum microseismic intensity is M VII (Reusch et al, 2016).…”

Section: Pockmark Fieldsmentioning

confidence: 99%

Potential secondary events caused by early Holocene paleoearthquakes in Fennoscandia – a climate-related review

Eldholm¹,

Bungum²

2021

NJG

View full text Add to dashboard Cite

During the last deglaciation of Fennoscandia, large earthquakes may have induced secondary effects on the high-latitude coastal regions and continental margins primarily from surface rock avalanches, large and small submarine slides, local and regional flooding, and tsunamis. In this overview, we show that the climate-earthquake-slide-tsunami causal sequence is particularly important, as is structural inheritance and rejuvenation. However, there are potential earthquake-generating early Holocene faults also beyond the previously defined Lapland Fault Province. Thus, we introduce the term the Greater Lapland Fault Province. Earthquakes in the expanded fault province are candidates for triggering the 8.1 ka Storegga Megaslide and/or its predecessors and coeval tsunamis. The events might have released other submarine slides, gas hydrate expulsion leaving large pockmark fields, rock avalanches and submarine mass wasting in fjord and lake settings. Moreover, the seismic events may also have triggered local and regional flooding by breakup of ice and sediment barriers.

show abstract

On the shallow volcanic response to remote seismicity

Cited by 3 publications

References 18 publications

Identification of Seismo‐Volcanic Regimes at Whakaari/White Island (New Zealand) Via Systematic Tuning of an Unsupervised Classifier

Identification of Seismo‐Volcanic Regimes at Whakaari/White Island (New Zealand) Via Systematic Tuning of an Unsupervised Classifier

A review framework of how earthquakes trigger volcanic eruptions

Potential secondary events caused by early Holocene paleoearthquakes in Fennoscandia – a climate-related review

Contact Info

Product

Resources

About