Janire PrudencioUniversity of Granada | UGR · Department of Theoretical Physics and the Cosmos
Janire Prudencio
PhD Earth Sciences - Volcano Seismology
About
68
Publications
28,015
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
722
Citations
Introduction
Additional affiliations
November 2018 - present
August 2016 - August 2018
September 2015 - July 2016
Education
January 2010 - September 2013
October 2008 - June 2010
September 2006 - June 2008
Publications
Publications (68)
Introduction: Volcano seismology has successfully predicted several eruptions and includes many reliable methods that have been adopted extensively by volcanic observatories; however, there are several problems that still lack solutions. Meanwhile, the overwhelming success of data-driven models to solve predictive complex real-world problems positi...
Seismic attenuation plays a vital role in geothermal exploration due to its direct association with the fluid content of reservoirs. In this study, we obtained the first attenuation model of La Palma island (Canary Islands) for geothermal exploration, applying a novel local-scale ambient noise attenuation tomography technique. Data from 44 seismic...
El Hierro island is one of the most active islands in the Canary Islands from a volcanological point of view. This is the reason why the imaging of the internal crustal structure is of huge importance. The geophysical exploration methods employed on El Hierro Island, such as gravimetry and seismic tomography, allowed obtaining the high-resolution c...
To better understand the shallow structure of El Hierro island, we determined a 3D S-wave velocity model using Ambient Noise Tomography (ANT). We exploited a dataset recorded by 21 broadband seismic stations deployed at El Hierro island in two surveys realized in 2015 and 2021. This dataset allowed us to obtain empirical Green’s functions by cross-...
The main objective of this work is to show that Shannon Entropy (SE) calculated on continuous seismic signals can be used in a volcanic eruption monitoring system. We analysed three years of volcanic activity of Volcán de Colima, México, recorded between January 2015 and May 2017. This period includes two large explosions, with pyroclastic and lava...
The search for pre‐eruptive observables that can be used for short‐term volcanic forecast remains a scientific challenge. Pre‐eruptive patterns in seismic data are usually identified by analyzing seismic catalogs (e.g., the number and types of recorded seismic events), the evolution of seismic energy, or changes in the tensional state of the volcan...
Volcanic activity on Tenerife Island is extremely diverse. Three radial rift zones are characterized by cinder cones from basaltic fissure eruptions. A triple junction in central Tenerife exhibits a complex of merged, predominantly phonolitic, stratovolcanoes. The Las Cañadas caldera and widespread ignimbrite deposits reveal high explosive potentia...
In this work we demonstrate that Shannon Entropy (SE) calculated on continuous seismic signals can be used efficiently in a volcanic monitoring system. We analysed three years of volcanic activity of Volcán de Colima, México, recorded between January 2015 and May 2017. This period includes two large explosions, with pyroclastic and lava flows, and...
The search for pre-eruptive observables that can be used for short-term volcanic early warning remains a scientific challenge. Pre-eruptive patterns in seismic data are usually identified by analyzing seismic catalogues (e.g., the number and types of recorded seismic events), the evolution of seismic energy, or changes in the tensional state of the...
For the first time, we obtained high-resolution images of Earth's interior of the La Palma volcanic eruption that occurred in 2021 derived during the eruptive process. We present evidence of a rapid magmatic rise from the base of the oceanic crust under the island to produce an eruption that was active for 85 days. This eruption is interpreted as a...
Plain Language Summary
Deception Island is the gateway for tourists to Antarctica and a laboratory to understand ice‐capped volcanoes and their eruptions. While the Island has been the target of many geophysical studies, no clear tomographic model shows how deep eruptive pathways of its last eruptions have reached the surface in the 1960s and 1970s...
El arco volcánico heleno es una región volcánica activa que ha de ser estudiado para su vigilancia. La isla de Santorini ha sido monitoreada para conocer la distribución espacial de la deformación desde 1992. Los satélites de Observación de la Tierra (EO) juegan un papel muy importante en el objetivo de monitorear el peligro de los volcanes. La Int...
Seismic tomography provides a window into magmatic plumbing systems; however, obtaining sufficient data for ‘real-time’ imaging is challenging. Until now, syn-eruptive tomography has not been successfully demonstrated. For the first time, we obtained high-resolution images of Earth's interior during an ongoing volcanic eruption. We used data from 1...
The volcanic complex of Cumbre Vieja on the island of La Palma is in eruption (October 2021) with serious implications for the inhabits of the island. SAR interferometry has been used as an operational tool in order to monitoring active volcanoes. The current study concerns the application of DinSAR and MTInSAR-SBAS in the area using Sentinel 1 SLC...
The polar regions provide valuable insights into the functioning of the Earth’s regulating systems. Conducting field research in such harsh and remote environments requires strong international cooperation, extended planning horizons, sizable budgets and long-term investment. Consequently, polar research is particularly vulnerable to societal and e...
We present the first two-dimensional (2-D) spatial distribution of seismic scattering and intrinsic attenuation beneath the Aeolian Islands arc. The Aeolian Islands archipelago represents one of the best examples of a small dimension volcanic island arc characterised by the alternation of different structural domains. Using the seismic wave diffusi...
We present a new three‐dimensional (3D) image of attenuation beneath Mt. Etna volcano based on the coda normalization method. Mt. Etna is an ideal natural laboratory for the application of new or unconventional tomography techniques owing to high levels of seismicity spanning a wide range of epicentral distances and depths. We retrieved seismic wav...
The Geysers geothermal field is located in northern California and is the world's largest producer of geothermal energy. Previous studies found spatio-temporal variations in seismic velocity that are likely related to fluid injections and distributions within the reservoir. Because seismic attenuation may exhibit more sensitivity to fluid saturatio...
Over the last decade machine learning has become increasingly popular for the analysis and characterization of volcano-seismic data. One of the requirements for the application of machine learning methods to the problem of classifying seismic time series is the availability of a training dataset; that is a suite of reference signals, with known cla...
Unrest at Long Valley caldera (California) during the past few decades has been attributed to the ascent of hydrothermal fluids or magma recharge. The difference is critical for assessing volcanic hazard. To better constrain subsurface structures in the upper crust and to help distinguish between these two competing hypotheses for the origin of unr...
We present 2-D attenuation images of the Mt Etna volcanic region on the basis of separation of intrinsic and scattering effects. The analysis presented here exploits a large active seismic database that fully covers the area under study. We observe that scattering effects dominate over intrinsic attenuation, suggesting that the region is very heter...
2D and 3D attenuation structures of Mt. Etna have been obtained with measurements of diffusion model and codanormalization method, respectively, with the same data-set used to develop the 3D velocity tomography (Diaz-Moreno et al. 2016). We have obtained intrinsic and scattering 2D maps applying the diffusion model which is an approximation of the...
We image seismic intrinsic ( Qi-1) and scattering ( Qs-1) attenuations in Long Valley Caldera, California, by analyzing more than 1,700 vertical component waveforms from local earthquakes. Observed energy envelopes are fit to the diffusion model and seismic attenuation images are produced using two-dimensional space weighting functions. Low intrins...
We present a P-wave scattering image of the volcanic structures under Tenerife Island using the autocorrelation functions of P-wave vertical velocity fluctuations. We have applied a cluster analysis to total quality factor attenuation (\( {Q}_t^{-1} \)) and scattering quality factor attenuation (\( {Q}_{PSc}^{-1} \)) images to interpret the structu...
In the Central Mediterranean region, the production of chemically diverse volcanic products (e.g., those from Mt. Etna and the Aeolian Islands archipelago) testifies to the complexity of the tectonic and geodynamic setting. Despite the large number of studies that have focused on this area, the relationships among volcanism, tectonics, magma ascent...
Deception Island volcano (Antarctica) is one of the most closely monitored and studied volcanoes on the region. In January 2005, a multi-parametric international experiment was conducted that encompassed both Deception Island and its surrounding waters. We performed this experiment from aboard the Spanish oceanographic vessel ‘Hespérides’, and from...
In this work we have done a 3D joint interpretation of magnetotelluric and seismic tomography models. Previously we have described different techniques to infer the inner structure of the Earth. We have focused on volcanic regions, specifically on Tenerife Island volcano (Canary Islands, Spain). In this area, magnetotelluric and seismic tomography...
http://meetingorganizer.copernicus.org/EGU2017/EGU2017-9088.pdf
We present intrinsic- and scattering-Q attenuation images for Usu volcano (Japan) by analyzing over 1800 vertical seismograms. By fitting the observed envelopes to the diffusion model, we obtained intrinsic and scattering attenuation values at three different frequency bands. Using a back-projection method and assuming a Gaussian-type weighting fun...
In this study we show 2D intrinsic- and scattering-Q images of Asama volcano obtained by analyzing 2320 waveforms from active data. Observed energy envelopes were fitted to the diffusion model and separate intrinsic- and scattering-Q images were produced using a back-projection method based on a Gaussian-type weighting function. Synthetic tests ind...
The TOMO-ETNA experiment was devised to image of the crust underlying the volcanic edifice and, possibly, its plumbing system by using passive and active refraction/reflection seismic methods. This experiment included activities both on-land and offshore with the main objective of obtaining a new high-resolution seismic tomography to improve the kn...
In the present paper we describe the on-land field operations integrated in the TOMO-ETNA experiment carried out in June-November 2014 at Mt. Etna volcano and surrounding areas. This terrestrial campaign consists in the deployment of 90 short-period portable three-component seismic stations, 17 broadband seismometers and the coordination with 133 p...
This work describes the automatic picking of the P-phase arrivals of the 3*106 seismic registers originated during the TOMO-ETNA experiment. Air-gun shots produced by the vessel Sarmiento de Gamboa and contemporary passive seismicity occurring in the island are recorded by a dense network of stations deployed for the experiment. In such scenario, a...
In this manuscript we present the new friendly seismic tomography software based on joint inversion of active and passive seismic sources called PARTOS (Passive Active Ray Tomography Software). This code has been developed on the base of two well-known widely used tomographic algorithms (LOTOS and ATOM-3D), providing a robust set of algorithms. The...
Short period small magnitude seismograms mainly comprise scattered waves in the
form of coda waves (the tail part of the seismogram, starting after S-waves and ending
when the noise prevails), spanning more than 70 percent of the whole seismogram dura-
tion. Corresponding coda envelopes provide important inShort period small magnitude
seismograms m...
We present the joint interpretation of two geophysical models obtained in the Tenerife Island. The geophysical data employed are complementary (seismic velocity and electrical resistivity). The 3D electrical resistivity structure of the island has been obtained trough 3D inversion of 148 magnetotelluric sites in the period range 0.001 to 10 s. Data...
In this manuscript we present a new interpretation of the seismic series that accompanied eruptive activity off the coast of El Hierro, Canary Islands, during 2011–2013. We estimated temporal variations of the Gutenberg-Richter b-value throughout the period of analysis, and performed high-precision relocations of the pre- and syn-eruptive seismicit...
Abstract This manuscript shows a new multidisciplinary interpretation approach
of the internal structure of Tenerife island. The central core of this work
is the determination of the three dimensional attenuation structure of the region
using P-waves and the Coda Normalization (CN) method. This study has
been performed using 45303 seismograms recor...
The seismic and volcanological structure of Deception Island (Antarctica) is an intense focus topic in
Volcano Geophysics. The interpretations given by scientists on the origin, nature, and location of the
structures buried under the island strongly diverge. We present a high-resolution 3D P-wave attenuation
tomography model obtained by using the c...
In this work we present intrinsic and scattering seismic attenuation 2D images of Stromboli volcano. We used 21953 waveforms from air-gun shots fired by an oceanographic vessel and recorded at 33 inland and 10 OBS seismic stations. Coda wave envelopes of the filtered seismic traces were fitted to the Energy Transport Equation in the diffusion appro...
We present a 3-D model of P and S velocities beneath El Hierro Island, constructed using the traveltime data of more than 13 000 local earthquakes recorded by the Instituto Geográfico Nacional (IGN, Spain) in the period from 2011 July to 2012 September. The velocity models were performed using the LOTOS code for iterative passive source tomography....
The complex volcanic system of Tenerife Island is known to have a highly heterogeneous character, as recently confirmed by velocity tomography. We present new information derived from intrinsic quality factor inverse maps (Qi-1), scattering quality factor inverse maps (Qs-1) and total quality factor inverse maps (Qt-1) obtained for the same region....
In this work we present regional maps of the inverse intrinsic quality factor (Qi-1), the inverse scattering quality factor (Qs-1) and total inverse quality factor (Qt-1) for the volcanic environment of Deception Island (Antarctica). Our attenuation study is based on Diffusion approximation, which permits us to obtain the attenuation coefficients f...
A three-dimensional S wave attenuation tomography of Tenerife island has
been obtained with measurements of coda-normalization method. We used
about 75000 waveforms relative to the dataset from an active seismic
experiments using offshore shots (air guns) recorded at over 100 onshore
seismic stations. The rays were traced in a 3D velocity model. Th...
A three-dimensional S wave attenuation tomography of Deception Island
has been obtained with measurements of coda-normalization method. We
used about 52000 waveforms relative to the dataset from an active
seismic experiment using offshore shots (air guns) recorded at over 100
onshore seismic stations. The rays were traced in a 3D velocity model.
Th...
In the present work we are going to analyze the same data-set used to
develop the 3D velocity tomographies to realize 2D intrinsic and
scattering attenuation tomography. For that we are going to apply the
diffusion model which is an approximation of the general energy
transport theory developed by Wegler et al. (2001) and Wegler (2003).
So, this ne...