scholarly journals Volcano seismicity and ground deformation unveil the gravity-driven magma discharge dynamics of a volcanic eruption

2015 ◽  
Vol 6 (1) ◽  
Author(s):  
Maurizio Ripepe ◽  
Dario Delle Donne ◽  
Riccardo Genco ◽  
Giuseppe Maggio ◽  
Marco Pistolesi ◽  
...  
Keyword(s):  
Volcanic Eruption ◽  
Ground Deformation ◽  
Volcano Seismicity ◽  
Magma Discharge ◽  
Gravity Driven

scholarly journals Influence of a hydrothermal system on ground deformation during volcanic eruption

2015 ◽  
Vol 8 (1) ◽  
pp. 16-23
Author(s):  
G.A. Zarin ◽  
O.E. Melnik ◽  
Y.D. Tsvetkova ◽  
A.A. Afanasyev
Keyword(s):  
Hydrothermal System ◽  
Volcanic Eruption ◽  
Ground Deformation

On the influence of a geothermal system on ground deformation during a volcanic eruption

2016 ◽  
Vol 57 (7) ◽  
pp. 1151-1158
Author(s):  
G. A. Zarin ◽  
O. E. Melnik ◽  
Yu. D. Tsvetkova ◽  
A. A. Afanasyev
Keyword(s):  
Volcanic Eruption ◽  
Ground Deformation ◽  
Geothermal System

scholarly journals Magma pressure discharge induces very long period seismicity

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
M. Ripepe ◽  
D. Delle Donne ◽  
D. Legrand ◽  
S. Valade ◽  
G. Lacanna
Keyword(s):  
Ground Deformation ◽  
Seismic Source ◽  
Sudden Expansion ◽  
Seismic Signals ◽  
Magma Column ◽  
Long Period ◽  
Magma Dynamics ◽  
Pressure Discharge ◽  
Volcano Seismicity ◽  
Elevation Changes

AbstractVolcano seismicity is one of the key parameters to understand magma dynamics of erupting volcanoes. However, the physical process at the origin of the resulting complex and broadband seismic signals remains unclear. Syn-eruptive very long period (VLP) seismic signals have been explained in terms of the sudden expansion of gas pockets rising in the liquid melt. Their origin is linked to a magma dynamics which triggers the explosive process occurring before the explosive onset. We provide evidence based on acoustic, thermal, and ground deformation data to demonstrate that VLP signals at Stromboli are generated at the top of the magma column mainly after the explosion onset. We show that VLP amplitude and duration scale with the eruptive flux which induces a decompression of 103–104 Pa involving the uppermost ~ 250 m of the feeding conduit. The seismic VLP source represents the final stage of a ~ 200 s long charge and discharge mechanism the magma column has to release excess gas accumulated at the base of a denser and degassed magma mush. The position of the VLP seismic source coincides with the centroid of the shallow mush plug and tracks elevation changes of the magma free surface.

scholarly journals PSInSAR Processing for Volcanic Ground Deformation Monitoring Over Fogo Island

Proceedings ◽  
2019 ◽  
Vol 24 (1) ◽  
pp. 3 ◽  
Author(s):  
Arun Babu ◽  
Shashi Kumar
Keyword(s):  
Phase Difference ◽  
Volcanic Eruption ◽  
Ground Deformation ◽  
Natural Disturbance ◽  
Volcanic Field ◽  
Deformation Monitoring ◽  
Line Of Sight ◽  
Persistent Scatterer Interferometry ◽  
Persistent Scatterers ◽  
Fogo Volcano

Persistent Scatterer Interferometry Synthetic Aperture Radar (PSInSAR) has been widely used in the precise measurement of ground deformation due to anthropogenic and natural disturbance of the earth’s surface. The present study has utilized the spaceborne C-band Sentinel-1 data for PSInSAR processing to generate a displacement map due to the volcanic eruption of Pico do Fogo volcano of the Fogo Island. An eruption was recorded in the year 2014–2015 and the Fogo volcano became active on 23 November 2014. It was observed that the intensity of the volcanic eruption during 2014–2015 had approached the intensity of the volcanic eruption of 1951, which was recorded as one of the strongest eruptions on the island. The volcanic eruption continued for 77 days and it stopped on 8 February 2015. To find the mean line-of-sight displacement from PSInSAR processing, a total of seven Single Look Complex (SLC) products of Sentinel-1 data in the interferometric mode were used. The SLC product of the SAR data that was acquired before the start of the volcanic eruption was chosen as the master image and all the remaining six slave images were precisely coregistered. The selection of Persistent Scatterers (PSs) is the most important step in PSInSAR processing. The initial set of PSs was identified by amplitude stability index and phase analysis was performed to estimate the phase stability of each resolution cell. After PS identification, 3D phase unwrapping was performed. The unwrapping step involved the low-pass filtering of the complex phase difference and time series in the frequency domain using a Gaussian window. The phase difference between each filtered data point was then calculated. The unwrapped phase of the interferogram was used to generate a displacement map for the volcanic field. The PSInSAR-based line-of-sight displacement was measured in the range of −34 mm to +35 mm and the standard deviation of the displacement ranged from +2 mm to +30 mm.

Hubungan Pengetahuan Tentang Manajemen Bencana Dengan Prevention Masyarakat Dalam Menghadapi Bencana Gunung Meletus Pada Kepala Keluarga Di Rt 06/Rw 01 Dusun Puncu Desa Puncu Kecamatan Puncu-Kediri

1970 ◽  
Vol 5 (2) ◽  
pp. 01
Author(s):  
Didit Damayanti ◽  
Pria Wahyu R.G ◽  
Muhanni’ah Muhanni’ah
Keyword(s):  
Disaster Management ◽  
Volcanic Eruption ◽  
Sampling Technique ◽  
P Value ◽  
Cross Sectional ◽  
Head Of Household ◽  
Correlational Research ◽  
Level Of Knowledge ◽  
Independent Variable ◽  
Negative Impacts

Introduction: Disaster management is a dynamic, continual, and integrated process as to increase the qualities of the actions which are relevant to the process of observation and analysis of disaster as well as minimalizing the negative impacts, mitigation, readiness, early warning, immediate emergency, rehabilitation and reconstruction. The aim of this research is to analyse theconnection between disaster management and the prevention of community breakdown in order to face a volcanic eruption for every head of household. Method: The design of this research is correlational research with a cross sectional approach. The demographic group that is used for this research is the head of households in Rt 06/Rw 01 dusun Puncu desa Puncu, by using the purposive sampling technique which has been collected from the sampling of the 33 heads of households. Independent variable is the knowledge of disaster management, and the dependent variable is the prevention of community breakdown in the handling of the disaster. The data has been received by using the questionnaire, and the results have been analysed by using spearman rho test. Result:  As according to the statistics test, it is found that p-value= 0,000 on the significant level (α) = 0,05 and r = 0,752. It is concluded that there is a connection between knowledge and the prevention of community breakdown in handling of the volcanic eruption in Rt 06/Rw 01. This research shows that the level of knowledge within the community about disaster management and prevention in handling volcanic eruption has been increasing. Conclution: This is shown by the capability of the community in mitigating the effects of the disaster. It is hoped that the community will further engage in training education and simulation to reduce the negative impacts of a disaster. The location where the participants resideis Kelud Volcano, and it is therefore hoped that the communities are willing to participate in better handling of any disaster by joining the education training and simulation; Kata kunci : Pengetahuan, Manajemen bencana, Prevention.

Failure Analysis Of Buried Gas Pipelines Crossing Seismic Faults

2020 ◽  
Vol 3 (2) ◽  
pp. 781-790
Author(s):  
M. Rizwan Akram ◽  
Ali Yesilyurt ◽  
A.Can. Zulfikar ◽  
F. Göktepe
Keyword(s):  
Ground Deformation ◽  
Warning System ◽  
Strike Slip ◽  
Gas Pipelines ◽  
Steel Pipes ◽  
Seismic Fault ◽  
Fault Parameters ◽  
Dip Angle ◽  
Permanent Ground Deformation ◽  
Recent Earthquakes

Research on buried gas pipelines (BGPs) has taken an important consideration due to their failures in recent earthquakes. In permanent ground deformation (PGD) hazards, seismic faults are considered as one of the major causes of BGPs failure due to accumulation of impermissible tensile strains. In current research, four steel pipes such as X-42, X-52, X-60, and X-70 grades crossing through strike-slip, normal and reverse seismic faults have been investigated. Firstly, failure of BGPs due to change in soil-pipe parameters have been analyzed. Later, effects of seismic fault parameters such as change in dip angle and angle between pipe and fault plane are evaluated. Additionally, effects due to changing pipe class levels are also examined. The results of current study reveal that BGPs can resist until earthquake moment magnitude of 7.0 but fails above this limit under the assumed geotechnical properties of current study. In addition, strike-slip fault can trigger early damage in BGPs than normal and reverse faults. In the last stage, an early warning system is proposed based on the current procedure. 

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