Results 11 to 20 of about 286 (143)
Structural Evolution of a Crustal-Scale Seismogenic Fault in a Magmatic Arc: The Bolfin Fault Zone (Atacama Fault System). [PDF]
Tectonics, 2021 Abstract How major crustal‐scale seismogenic faults nucleate and evolve in crystalline basements represents a long‐standing, but poorly understood, issue in structural geology and fault mechanics. Here, we address the spatio‐temporal evolution of the Bolfin Fault Zone (BFZ), a >40‐km‐long exhumed seismogenic splay fault of the 1000‐km‐long strike‐slip ...
Masoch S +8 more
europepmc +2 more sources
Characterization of moderate ash-and-gas explosions at Santiaguito volcano, Guatemala, from infrasound waveform inversion and thermal infrared measurements. [PDF]
Geophys Res Lett, 2016 Abstract The rapid discharge of gas and rock fragments during volcanic eruptions generates acoustic infrasound. Here we present results from the inversion of infrasound signals associated with small and moderate gas‐and‐ash explosions at Santiaguito volcano, Guatemala, to retrieve the time history of mass eruption rate at the vent.
Angelis S +7 more
europepmc +2 more sources
Subseismic to Seismic Slip in Smectite Clay Nanofoliation. [PDF]
J Geophys Res Solid Earth, 2019 Abstract Smectite clays are the main constituent of slipping zones found in subduction zone faults at shallow depth (e.g., <1‐km depth in the Japan Trench) and in the decollements of large landslides (e.g., 1963 landslide, Vajont, Italy). Therefore, deformation processes in smectite clays may control the mechanical behavior from slow creep to fast ...
Aretusini S +3 more
europepmc +2 more sources
Journal of Geophysical Research: Solid Earth, Volume 128, Issue 5, May 2023., 2023 Abstract We present the first rupture models of the two mainshocks of the 2012 northern Italy sequence, determined by jointly inverting seismic and geodetic data. We aim at providing new insights into the mainshocks for which contrasting seismotectonic interpretations are proposed in literature. Sources' geometric parameters were constrained by seismic
L. Improta +4 more
wiley +1 more source
Journal of Geophysical Research: Solid Earth, Volume 127, Issue 6, June 2022., 2022 Abstract The impact of hazardous pyroclastic density currents (PDCs) increases with runout distance, which is strongly influenced by the mass flux. This article shows that the mass flux of a PDC may derive not only from vent discharge during the eruption, but also from partly hot, temporary stores (accumulations) of aerated pyroclastic material perched
Gilda Risica +4 more
wiley +1 more source
Geophysical Research Letters, Volume 49, Issue 7, 16 April 2022., 2022 Abstract We investigate the 19 September 2021 eruption of the Cumbre Vieja volcano (La Palma, Canary Islands, Spain). In particular, we analyze the Differential Interferometric Synthetic Aperture Radar (DInSAR) measurements obtained by processing Sentinel‐1 images acquired from both ascending and descending orbits.
C. De Luca +5 more
wiley +1 more source
Ecosphere, Volume 13, Issue 3, March 2022., 2022 Abstract Global warming is expected to affect movement‐related thermoregulation in ectotherms, but the likely effects on thermoconforming lizards, which spend little energy in thermoregulation behavior, are unclear. We used the Guatemalan beaded lizard (Heloderma charlesbogerti) as a model thermoconforming species to investigate the effects of ambient ...
Daniel Ariano‐Sánchez +5 more
wiley +1 more source
Analyzing Explosive Volcanic Deposits From Satellite‐Based Radar Backscatter, Volcán de Fuego, 2018
Journal of Geophysical Research: Solid Earth, Volume 126, Issue 9, September 2021., 2021 Abstract Satellite radar backscatter has the potential to provide useful information about the progression of volcanic eruptions when optical, ground‐based, or radar phase‐based measurements are limited. However, backscatter changes are complex and challenging to interpret: explosive deposits produce different signals depending on pre‐existing ground ...
E. W. Dualeh +8 more
wiley +1 more source
Moho Depth of Northern Baja California, Mexico, From Teleseismic Receiver Functions
Earth and Space Science, Volume 8, Issue 6, June 2021., 2021 Abstract We estimated Moho depths from data recorded by permanent and temporary broadband seismic stations deployed in northern Baja California, Mexico, using the receiver function technique. This region is composed of two subregions of contrasting geological and topographical characteristics: the Peninsular Ranges of Baja California (PRBC), a ...
E. E. Ramírez +4 more
wiley +1 more source
Thermal Weakening Friction During Seismic Slip: Experiments and Models With Heat Sources and Sinks
Journal of Geophysical Research: Solid Earth, Volume 126, Issue 5, May 2021., 2021 Abstract Experiments that systematically explore rock friction under crustal earthquake conditions reveal that faults undergo abrupt dynamic weakening. Processes related to heating and weakening of fault surfaces have been invoked to explain pronounced velocity weakening.
S. Nielsen +3 more
wiley +1 more source