A5050195319- earthquake and tectonic studies
- Geological and Geochemical Analysis
- Seismology and Earthquake Studies
- Atmospheric and Environmental Gas Dynamics
- Earthquake Detection and Analysis
- Geology and Paleoclimatology Research
- Atmospheric Ozone and Climate
- Geological and Tectonic Studies in Latin America
- Geochemistry and Geologic Mapping
- Seismic Waves and Analysis
- Landslides and related hazards
- Marine and environmental studies
- Hydrocarbon exploration and reservoir analysis
- Methane Hydrates and Related Phenomena
- Geophysics and Gravity Measurements
- Geological and Geophysical Studies
- Ocean Acidification Effects and Responses
- Cryospheric studies and observations
- Atmospheric chemistry and aerosols
- Synthetic Aperture Radar (SAR) Applications and Techniques
- Planetary Science and Exploration
- Archaeological and Geological Studies
- Archaeological and Historical Studies
- Geophysics and Sensor Technology
- Infrared Target Detection Methodologies
GEOMAR Helmholtz Centre for Ocean Research Kiel
2012-2024
GFZ Helmholtz Centre for Geosciences
2019-2024
GEOMAR Technologie GmbH - GTG
2017-2019
Abstract This study performed the first assessment of volcanic gas output from Central Volcanic Zone (CVZ) northern Chile. We present fluxes and compositions gases (H 2 O, CO , H HCl, HF, HBr) five most actively degassing volcanoes in this region—Láscar, Lastarria, Putana, Ollagüe, San Pedro—obtained during field campaigns 2012 2013. The inferred plume for Láscar Lastarria (CO /S tot = 0.9–2.2; S /HCl 1.4–3.4) are similar to those obtained Southern Chile, suggesting uniform magmatic...
Abstract. We evaluated NOVAC (Network for Observation of Volcanic and Atmospheric Change) gas emission data from the 2015 eruption Cotopaxi volcano (Ecuador) BrO∕SO2 molar ratios. The ratios were very small prior to phreatomagmatic explosions in August 2015, significantly higher after explosions, continuously increasing until end unrest period December 2015. These observations together with similar findings previous studies at other volcanoes (Mt. Etna, Nevado del Ruiz, Tungurahua) suggest a...
Abstract. Small steam-driven volcanic explosions are common at volcanoes worldwide but rarely documented or monitored; therefore, these events still put residents and tourists risk every year. Steam-driven also occur frequently (once 2–5 years on average) Lascar volcano, Chile, where they often spontaneous lack any identifiable precursor activity. Here, for the first time Lascar, we describe processes culminating in such a sudden explosion that occurred 30 October 2015, which was thoroughly...
One of the major problems in volcanic surveillance is how data from several techniques can be correlated and used to discriminate between possible precursors eruptions changes related non-eruptive processes. Gas chemical surveys measurements SO 2 emission rates performed past (2006–2019) at Lastarria volcano Northern Chile have revealed a persistent increment magmatic sourced gas emissions since late November 2012, following 13 years period intense ground uplift. In this work, we provide new...
Modern volcano monitoring commonly involves Interferometric Synthetic Aperture Radar (InSAR) measurements to identify ground motions caused by volcanic activity. However, InSAR is largely affected changes in atmospheric refractivity, particular which can be attributed the distribution of water (H2O) vapor column. Gas emissions from continuously degassing volcanoes contain abundant and thus produce variations content above downwind volcano, are notably well captured short-wavelength X-band...
Volcanic flanks subject to hydrothermal alteration become mechanically weak and gravitationally unstable, which may collapse develop far-reaching landslides. The dynamics trajectories of volcanic landslides are hardly preserved challenging determine, is due the steep slopes inherent instability. Here we analyze proximal deposits 21 July 2014, landslide at Askja (Iceland), by combining high-resolution imagery from satellites Unoccupied Aircraft Systems. We performed a Principal Component...
Abstract. Long-term measurements of volcanic gas emissions conducted during the last decade suggest that under certain conditions magnitude or chemical composition exhibits periodic variations with a period about 2 weeks. A possible cause such periodicity can be attributed to Earth tidal potential. The phenomenology link has been debated for long, but no quantitative model yet proposed. aim this paper is elucidate whether causal between forcing and in degassing traced analytically. We...
Abstract. Identification of seismically active fault zones and the definition sufficiently large respect distances from these faults which enable avoiding damaged rock zone surrounding ruptured ground commonly are amongst first steps to take in geoscientific evaluation sites suitable for nuclear waste disposal. In this work we present a GIS-based approach, using earthquake-epicentre locations instrumental earthquake record South-Korea identify potentially country, compare different...
Abstract. Small steam-driven volcanic explosions are common at volcanoes worldwide but rarely documented or monitored; therefore, these events still put residents and tourists risk every year. Steam-driven also occur frequently (once 2–5 years on average) Lascar volcano, Chile, where they often spontaneous lack any identifiable precursor activity. Here, for the first time Lascar, we describe processes culminating in such a sudden explosion that occurred October 30, 2015, which was thoroughly...
Abstract. We evaluated NOVAC (Network for Observation of Volcanic and Atmospheric Change) gas emission data from the 2015 eruption Cotopaxi volcano (Ecuador) BrO/SO2 molar ratios. Statistical analysis revealed a conspicuous periodic pattern with periodicity about two weeks in three month time series. While series is too short to rule out chance recurrence transient geological or meteorological events as possible origin signal, we nevertheless took this observation motivation examine...
Abstract. Long-term measurements of volcanic gas emissions conducted during the recent decade suggest that under certain conditions magnitude or chemical composition exhibits periodic variations with a period about two weeks. A possible cause such periodicity can be attributed to Earth tidal potential. The phenomenology link has been debated for long, but no quantitative model yet proposed. aim this paper is elucidate whether causal from forcing variation in degassing traced analytically. We...