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Although hydrothermally active submarine volcanoes account for much of Earth's volcanism and are mineral-rich biological hotspots, very little is known about microbial diversity in these systems.In th...
Geoscientists have discovered the first direct evidence that material from deep within Earth's mantle transition zone -- a layer rich in water, crystals and melted rock -- can percolate to the surface...
International Workshop on Understanding Earthquakes and Volcanoes from Lithosphere to Space
large earthquakes volcanic eruptions
2016/7/27
Electromagnetic Studies of Earthquakes and Volcanoes (EMSEV) is an inter-association working group of IUGG. It focuses on the observation and understanding of the various kinds of electromagnetic phen...
When dormant volcanoes are about to erupt, they show some predictive characteristics—seismic activity beneath the volcano starts to increase, gas escapes through the vent, or the surrounding ground st...
A repeatable seismic source for tomography at volcanoes
Mt. Merapi tomography active seismics
2015/10/8
One major problem associated with the interpretation of seismic signals on active volcanoes is the lack of knowledge about the internal structure of the volcano. Assuming a 1D or a homogeneous instead...
Novel laser-based techniques for monitoring of volcanoes
diode laser absorption spectroscopy optical fiber
2015/9/10
An overview of novel laser techniques suitable for volcanic monitoring, based on different kinds of infrared laser
sources, is presented. Their main advantages and drawbacks are discussed focusing on...
A model of sulphur solubility for hydrous mafic melts: application to the determination of magmatic fluid compositions of Italian volcanoes
sulphur hydrous basalts volcanic gas
2015/9/10
We present an empirical model of sulphur solubility that allows us to calculate f S2 if P, T, fO2 and the melt composition,
including H2O and S, are known. The model is calibrated against three main ...
Mud volcanoes and microseepage: the forgotten geophysical components of atmospheric methane budget
methane lithosphere degassing mudvolcanoes greenhouse gas geodynamics
2015/9/10
Mud volcanoes and microseepage are two important natural sources of atmospheric methane, controlled by neotectonics
and seismicity. Petroleum and gas reservoirs are the deep sources, and faults and f...
Mud volcanoes and methane seeps in Romania: main features and gas flux
methane mud volcanoes Romania
2015/9/2
Romania is one of the European countries with the most vigorous natural seepage of methane, uprising from
pressurised natural gas and petroleum reservoirs through deep faults. The largest seepage zon...
Gas discharges from four remote volcanoes in northern Chile (Putana, Olca, Irruputuncu and Alitar): a geochemical survey
Fluid geochemistry Subduction zone Volcanic risk Geochemical data Volcano monitoring
2015/8/27
We analyzed gas samples collected from fumaroles and bubbling pools at Irruputuncu, Putana, Olca and Alitar volcanoes located in the central Andes volcanic zone (northern Chile). The Irruputuncu and P...
Monitoring active volcanoes: The geochemical approach
Active volcanoes geochemistry volcanic activity lava dissolving volatiles
2015/8/27
The geochemical surveillance of an active volcano aims to recognize possible signals that are related to changes in volcanic activity. Indeed, as a consequence of the magma rising inside the volcanic ...
Eruption patterns of parasitic volcanoes
Parasitic vents Parasitic eruptions Shear fracture model Twin parasitic vents Various patterns of parasitic eruptions
2015/8/14
Eruption patterns of parasitic volcanoes are discussed in order to study their correlation to the activities of their parental polygenetic volcanoes. The distribution density of parasitic vents on pol...
Expedition to the Aleutian Islands:Geoscientists head to remote Alaska volcanoes
the Aleutian Islands Geoscientists head Alaska volcanoes
2015/8/13
This is the 11th part in a series on NSF's geosciences risk and resilience interest area. Please see parts one, two, three,four, five, six, seven, eight, nine...
Three quarters of Earth's volcanic activity occurs beneath the sea, predominantly along the extensive mid-ocean ridge system that winds its way through the major ocean basins. The style of eruptive ac...
The Geological History of Deep-Sea Volcanoes: Biosphere,Hydrosphere,and Lithosphere Interactions
Deep-Sea Volcanoes Biosphere Hydrosphere Lithosphere
2015/7/7
The geological evolution of seamounts has distinct influence on their interactions with the ocean, their hydrology, geochemical fluxes, biology, resources, and geohazards. There are six geological evo...