scholarly journals Direction of magma migration in Sinabung volcano based on February 2017 hypocenter distribution

2021 ◽  
Author(s):  
Suci Ramayanti ◽  
Wahyu Srigutomo ◽  
I. Gede Putu Fadjar Soerya Djaja ◽  
Prihandhanu Mukti Pratomo ◽  
Hetty Triastuty
Keyword(s):  
Hypocenter Distribution ◽  
Magma Migration

Magma migration beneath an ocean ridge

1979 ◽  
Vol 45 (1) ◽  
pp. 115-122 ◽  
Author(s):  
J.L. Ahern ◽  
D.L. Turcotte
Keyword(s):  
Magma Migration ◽  
Ocean Ridge

Basin inversion and magma migration and emplacement: Insights from basins of northern Chile

2018 ◽  
Vol 114 ◽  
pp. 310-319 ◽  
Author(s):  
Fernando Martínez ◽  
Domenico Montanari ◽  
Chiara Del Ventisette ◽  
Marco Bonini ◽  
Giacomo Corti
Keyword(s):  
Northern Chile ◽  
Basin Inversion ◽  
Magma Migration

Numerical Simulation of Hour-Scale Magma Migration Using Pre-Eruptive Ground Deformation

2013 ◽  
Author(s):  
S. Minami ◽  
M. Iguchi ◽  
H. Mikada ◽  
T. Goto ◽  
J. Takekawa
Keyword(s):  
Numerical Simulation ◽  
Ground Deformation ◽  
Magma Migration

Post-rift magmatism on the northern South China Sea margin

2020 ◽  
Vol 132 (11-12) ◽  
pp. 2382-2396 ◽  
Author(s):  
Qiliang Sun ◽  
Tiago M. Alves ◽  
Minghui Zhao ◽  
Jean-Claude Sibuet ◽  
Gérôme Calvès ◽  
...  
Keyword(s):  
South China Sea ◽  
South China ◽  
Northern South China Sea ◽  
Lava Flows ◽  
Normal Faults ◽  
Boundary Fault ◽  
China Sea ◽  
Detachment Faults ◽  
Plumbing Systems ◽  
Magma Migration

Abstract Intense magmatism in the form of widespread volcanoes and lava flows is identified in high-resolution 3-D seismic data over a post-rift sequence of the northern South China Sea (SCS). Such a magmatism post-dates the end of seafloor spreading in the SCS by at least 6.8 m.y. A detachment (boundary) fault propagating into a deep-seated magma chamber provided the main vertical pathway for magma migration. In turn, normal faults and dykes constituted a shallow plumbing system through which the magma migrated from the boundary fault and was extruded onto the paleo-seafloor. Volcanism occurred in the study area from ca. 8.2 Ma to ca. 1.1 Ma in the form of two distinct events, dated ca. 5.2 Ma and ca. 2.8 Ma, which are correlated with the Dongsha Event. Extrusive magma formed volcano edifices and extensive lava flows; the latter of which were confined to the troughs of sediment waves or, instead, flowed along submarine canyons. As a corollary, this study shows that in the SCS: (1) young magmatism is widespread on the northern continental margin, (2) seafloor morphology greatly influences the architecture of deep-water volcanoes, and (3) syn-rift faults (especially detachment faults) reactivated by regional tectonics closely control the magma plumbing systems.

Integrated monitoring of soil gases, plume SO2 and volcanic tremor to detect impulsive magma transfer at Mt. Etna volcano (Italy)

2020 ◽  
Author(s):  
Susanna Falsaperla ◽  
Tommaso Caltabiano ◽  
Alessia Donatucci ◽  
Salvatore Giammanco ◽  
Horst Langer ◽  
...  
Keyword(s):  
Volcanic Tremor ◽  
Easy Access ◽  
Geochemical Data ◽  
Integrated Monitoring ◽  
Seismic Stations ◽  
Geochemical Parameters ◽  
Mt Etna ◽  
Magma Migration ◽  
Soil Gases ◽  
Rms Amplitude

<p>Magma transfer in an open-conduit volcano is a complex process that is still open to debate and not entirely understood. For this reason, a multidisciplinary monitoring of active volcanoes is not only welcome, but also necessary for a correct comprehension of how volcanoes work. Mt. Etna is probably one of the best test sites for doing this, because of the large multidisciplinary monitoring network setup by the Osservatorio Etneo of Istituto Nazionale di Geofisica e Vulcanologia (INGV-OE), the high frequency of eruptions and the relatively easy access to most of its surface.<br>We present new data on integrated monitoring of volcanic tremor, plume sulphur dioxide (SO<sub>2</sub>) flux and soil hydrogen (H<sub>2</sub>) and carbon dioxide (CO<sub>2</sub>) concentration from Mt. Etna. The RMS amplitude of volcanic tremor was measured by seismic stations at various distances from the summit craters, plume SO<sub>2</sub> flux was measured from nine stations around the volcano and soil gases were measured in a station located in a low-temperature (T ∼ 85 °C) fumarole field on the upper north side of the volcano.<br>During our monitoring period, we observed clear and marked anomalous changes in all parameters, with a nice temporal sequence that started with a soil CO<sub>2</sub> and SO<sub>2</sub> flux increase, followed a few days later by a soil H<sub>2</sub> spike-like increase and finally with sharp spike-like increases in RMS amplitude (about 24 h after the onset of the anomaly in H<sub>2</sub>) at all seismic stations.<br>After the initial spikes, all parameters returned more or less slowly to their background levels. Geochemical data, however, showed persistence of slight anomalous degassing for some more weeks, even in the apparent absence of RMS amplitude triggers. This suggests that the conditions of slight instability in the degassing magma column inside the volcano conduits lasted for a long period, probably until return to some sort of balance with the “normal” pressure conditions.<br>The RMS amplitude increase accompanied the onset of strong Strombolian activity at the Northeast Crater, one of the four summit craters of Mt. Etna, which continued during the following period of moderate geochemical anomalies. This suggests a cause-effect relationship between the anomalies observed in all parameters and magma migration inside the central conduits of the volcano. Volcanic tremor is a well-established key parameter in the assessment of the probability of eruptive activity at Etna and it is actually used as a basis for a multistation system for detection of volcanic anomalies that has been developed by INGV-OE at Etna. Adding the information provided by our geochemical parameters gave us more solid support to this system, helping us understand better the mechanisms of magma migration inside of an active, open-conduit basaltic volcano.</p>

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