Volcanic ash

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Volcanic ash consists of small tephra, which are bits of pulverized rock and glass created by volcanic eruptions, less than 2 millimetres (0.1 in) in diameter. (Wikipedia.org)






Conferences related to Volcanic ash

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2020 IEEE International Instrumentation and Measurement Technology Conference (I2MTC)

The Conference focuses on all aspects of instrumentation and measurement science andtechnology research development and applications. The list of program topics includes but isnot limited to: Measurement Science & Education, Measurement Systems, Measurement DataAcquisition, Measurements of Physical Quantities, and Measurement Applications.


2019 44th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)

Science, technology and applications spanning the millimeter-waves, terahertz and infrared spectral regions


2019 IEEE International Geoscience and Remote Sensing Symposium (IGARSS)

International Geosicence and Remote Sensing Symposium (IGARSS) is the annual conference sponsored by the IEEE Geoscience and Remote Sensing Society (IEEE GRSS), which is also the flagship event of the society. The topics of IGARSS cover a wide variety of the research on the theory, techniques, and applications of remote sensing in geoscience, which includes: the fundamentals of the interactions electromagnetic waves with environment and target to be observed; the techniques and implementation of remote sensing for imaging and sounding; the analysis, processing and information technology of remote sensing data; the applications of remote sensing in different aspects of earth science; the missions and projects of earth observation satellites and airborne and ground based campaigns. The theme of IGARSS 2019 is “Enviroment and Disasters”, and some emphases will be given on related special topics.


2019 Integrated Communications, Navigation and Surveillance Conference (ICNS)

Conference brings together international leaders in Air Traffic Management and the technologies to integrate manned and unmanned aircraft into the NAS. FAA, Eurocontrol, NASA and industry reps plus other international agencies attend to share the latest on CNS. This include NextGen and Sesar.


2018 13th IEEE Conference on Industrial Electronics and Applications (ICIEA)

Industrial Informatics, Computational Intelligence, Control and Systems, Cyber-physicalSystems, Energy and Environment, Mechatronics, Power Electronics, Signal and InformationProcessing, Network and Communication Technologies


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Periodicals related to Volcanic ash

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Computer Graphics and Applications, IEEE

IEEE Computer Graphics and Applications (CG&A) bridges the theory and practice of computer graphics. From specific algorithms to full system implementations, CG&A offers a strong combination of peer-reviewed feature articles and refereed departments, including news and product announcements. Special Applications sidebars relate research stories to commercial development. Cover stories focus on creative applications of the technology by an artist or ...


Dielectrics and Electrical Insulation, IEEE Transactions on

Electrical insulation common to the design and construction of components and equipment for use in electric and electronic circuits and distribution systems at all frequencies.


Geoscience and Remote Sensing Letters, IEEE

It is expected that GRS Letters will apply to a wide range of remote sensing activities looking to publish shorter, high-impact papers. Topics covered will remain within the IEEE Geoscience and Remote Sensing Societys field of interest: the theory, concepts, and techniques of science and engineering as they apply to the sensing of the earth, oceans, atmosphere, and space; and ...


Geoscience and Remote Sensing, IEEE Transactions on

Theory, concepts, and techniques of science and engineering as applied to sensing the earth, oceans, atmosphere, and space; and the processing, interpretation, and dissemination of this information.


Instrumentation and Measurement, IEEE Transactions on

Measurements and instrumentation utilizing electrical and electronic techniques.


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Most published Xplore authors for Volcanic ash

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Xplore Articles related to Volcanic ash

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Dinsar technique for retrieving the volume of volcanic materials erupted by Merapi volcano

2012 IEEE International Geoscience and Remote Sensing Symposium, 2012

In the present paper, we propose the application of a differential synthetic aperture radar interferometry (DInSAR) technique to retrieve the volume changes of the damaged area and the volcanic sediment on the sloped surface of Merapi volcano, Indonesia, which erupted on October 26 and November 4, 2010. This technique was used to investigate the thickness of volcanic ash and the ...


Quantitative estimation of erupted volcanic ash by using satellite image

IGARSS '98. Sensing and Managing the Environment. 1998 IEEE International Geoscience and Remote Sensing. Symposium Proceedings. (Cat. No.98CH36174), 1998

Quantitative estimation of erupted volcanic materials is extremely important to recognize the magnitude of eruption and to predict the effect on the global and local environments. A field geological technique, which needs much more time, is applied to estimate erupted materials such as volcanic ash. Several ground-based remote sensing methods were also presented to estimate discharge rates of volcanic gasses ...


A multisensor data fusion approach for the volcanic ash granulometry classification

SENSORS, 2014 IEEE, 2014

In this paper a methodology to be adopted for volcanic ash average granulometry estimation is presented. The main idea is to count the number of ash particles in a known volume. To this purpose a piezoelectric transducer was used to convert ash particles impacts into electrical signals, which provide information about the number of ash particles. Moroever, a couple of ...


Monitoring of seasonal influence on spatial distribution of moisture content at a natural Kanto loam site using ground wave of GPR

Proceedings of the XIII Internarional Conference on Ground Penetrating Radar, 2010

Ground penetrating radar (GPR) ground wave was used at a natural Kanto loam (i.e. Andisol) site to examine the influence of seasonal variations on surface soil-moisture content. Kanto loam is a type of volcanic ash soil found widely distributed in Japan. In order to investigate the influence of surface soil conditions on GPR based estimates, the study site was divided ...


Temporal decorrelation model in repeat pass SAR interferometry for detection of volcanic ash

2014 IEEE Geoscience and Remote Sensing Symposium, 2014

The coherence in SAR interferometry is used as a parameters for change detection. However, it is difficult to quantitatively analyze the coherence value because the decorrelation come from diverse reasons and the unwanted targets naturally changes. In order to isolate the changed region by an accumulation of the volcanic ash, we analyze the reasons of the decorrelation. We estimate the ...


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Educational Resources on Volcanic ash

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IEEE-USA E-Books

  • Dinsar technique for retrieving the volume of volcanic materials erupted by Merapi volcano

    In the present paper, we propose the application of a differential synthetic aperture radar interferometry (DInSAR) technique to retrieve the volume changes of the damaged area and the volcanic sediment on the sloped surface of Merapi volcano, Indonesia, which erupted on October 26 and November 4, 2010. This technique was used to investigate the thickness of volcanic ash and the volume change of post-ejected wet lava (sand and rock) surrounding Merapi volcano by assessing L-band ALOS PALSAR data. The results reveal the volume of the damaged area, or deformation, and the volume of sedimentation in the study area are 1.4 million and 2.2 million m<sup>3</sup>, respectively, and indicate that the radius of the dangerous area is 15.6 km.

  • Quantitative estimation of erupted volcanic ash by using satellite image

    Quantitative estimation of erupted volcanic materials is extremely important to recognize the magnitude of eruption and to predict the effect on the global and local environments. A field geological technique, which needs much more time, is applied to estimate erupted materials such as volcanic ash. Several ground-based remote sensing methods were also presented to estimate discharge rates of volcanic gasses (mainly H/sub 2/O and SO/sub 2/). However, estimation methods of volcanic materials by using satellite image have not been presented so much. The authors think that the method by using satellite images is very effective and safe. They propose a new remote sensing technique to estimate the erupted volcanic ash by using satellite image based on the physical model of motion of volcanic ash and they applied it to the 1995 eruption of Kuju volcano, central Kyushu, Japan. Their estimation shows a reasonable coincidence with the value obtained by a field geological technique.

  • A multisensor data fusion approach for the volcanic ash granulometry classification

    In this paper a methodology to be adopted for volcanic ash average granulometry estimation is presented. The main idea is to count the number of ash particles in a known volume. To this purpose a piezoelectric transducer was used to convert ash particles impacts into electrical signals, which provide information about the number of ash particles. Moroever, a couple of infrared (IR) diode-phototransistors allows for the monitoring of the ash level in the instrumented tank. Information from this sensor should be used in a multisensor data fusion approach with information on the ash granulometry gained by the methodology proposed by authors in a previous work. Experimental results showing the suitability of the proposed approach are presented.

  • Monitoring of seasonal influence on spatial distribution of moisture content at a natural Kanto loam site using ground wave of GPR

    Ground penetrating radar (GPR) ground wave was used at a natural Kanto loam (i.e. Andisol) site to examine the influence of seasonal variations on surface soil-moisture content. Kanto loam is a type of volcanic ash soil found widely distributed in Japan. In order to investigate the influence of surface soil conditions on GPR based estimates, the study site was divided in two zones: with and without vegetation. Measurements were conducted at regular intervals during a three month monitoring period. Results indicated that GW was sensitive to the surface soil conditions as well as to seasonal variations. A significant increase in moisture content was observed in the vegetated zone over that of the bare zone during a period of a day after precipitation (i.e. September 1st). It shows that in the vegetated zone moisture in plants themselves, including roots, stems, and leaves, affects GPR measurements, leading to higher moisture content than in the bare zone. However, the influence of vegetation was not found to have a large impact during periods of good weather. The effectiveness of surface soil conditions with seasonal variations on GPR-based moisture content provided a clear insight to agricultural management prospectivies. This research confirmed that Kanto loam can be a good GPR site for noninvasive mapping of moisture content regardless of the presence of organic matter, silt, and clay content.

  • Temporal decorrelation model in repeat pass SAR interferometry for detection of volcanic ash

    The coherence in SAR interferometry is used as a parameters for change detection. However, it is difficult to quantitatively analyze the coherence value because the decorrelation come from diverse reasons and the unwanted targets naturally changes. In order to isolate the changed region by an accumulation of the volcanic ash, we analyze the reasons of the decorrelation. We estimate the temporal decorrelation using time-series dataset and predict the temporal decorrelation for dataset involving dramatic changes. The estimated and the expected ratio is useful to identify the regions affected by volcanic ash. This method successfully isolate the regions with dramatic change due to volcanic ash from the naturally changing region, easily misinterpreted as a dramatic changed area.

  • Training the pilot on the operational implications of volcanic ash

    Pilot training on volcanic ash is a first priority. A training plan must include the unique characteristics of volcanic ash; the capabilities and shortcomings of ash detection and tracking; processes involved in the warning and forecast system; and recognition when an inadvertent entry into an ash cloud has occurred. The training is intended to provide the flight crew and air traffic controllers with an understanding of volcanic ash issues that range from detection to avoidance and mitigation of the effects of ash encounters.

  • Predicting the dispersion of volcanic ash from 2013 eruption of Sakurajima, Japan

    Mt. Sakurajima in kagosima, japan is one of the most active volcanoes in the world. On 18 August 2013, the Sakurajima volcano recently went into the largest scaled eruption with a huge plume of volcanic ash. Therefore, the concern arises if this considerable amount of ashes might flow into the Korea peninsula as well as Japan. In this paper, we performed numeric experiment to analyze how volcanic product resulted from the Sakurajima volcano has impacted on Korea. In order to predict the spread pathway of ash, The Hybrid Single- Particle Lagrangian Integrated Trajectory (HYSPLIT) model and United Model (UM) data has been used and 17th September 2013 has been selected as observation date since it is expected that the volcanic ash would flow into the South Korea. In addition, we have detected ash dispersion by using optical Communication, Ocean and Meteorological Satellite- Geostationary Ocean Color Imager (COMS-GOCI) images. As the results, we come to a very satisfactory conclusion that the spread pathway of volcanoes based on HYSPLIT model are matched well with ash dispersion area detected from COMS-GOCI satellites image.

  • Measurement of radioactivity in mount st. helens volcanic ash by x/γ ray spectrometry

    A Si(Li)-NaI(Tl) x/γ-ray spectrometer is used for assaying radionuclides in the ash from the Mount St. Helens eruption of May 18, 1980. Spectra of the ash are compared with those of local soil obtained before the eruption. The activity in the ash from the 238Uand 232Thdecay chains is 40% of that in soil. The relative 238Uactivity is 50%, while the 232This relatively depleted, its activity being only 25% of that in the soil. The Si(Li) detector is mounted on edge to permit counting two samples simultaneously and is sandwiched together with the samples between two large NaI(Tl) scintillators. The Si(Li) detector is normally operated in anticoincidence with the scintillators to suppress the γ-ray background thereby Increasing the sensitivity. However in this study the NaI(Tl) detectors are used in coincidence to identify the Th x rays having coincident γ rays characteristic to the 232Thdecay chain. This is a novel alternate way of using the scintillators. These results demonstrate the usefulness of this spectrometer for measuring activity levels below that of natural soil.

  • Remote sensing of global volcanic eruptions using Fengyun series satellites

    The serious impact of volcanic eruption to aviation and the long term climate have gained widely public attention in recently years. China's meteorological satellites (Fengyun series) have gradually become an integral part of the global satellite observation system and also provide a new data source for monitoring global volcanic eruption. In this work, recent researches and applications about volcanic eruption using China's meteorological satellites was introduced. Our researches are mainly focused on three aspects, including "hot spot” detection using mid-infrared channels, volcanic ash detection using China's new generation polar-orbiting satellites (FY-3), and volcanic ash mass loading estimation. A new approach for quantitatively estimation of volcanic ash mass loading was proposed, which was developed in preparation for China's new generation of geostationary satellite FY-4. These study shows China's meteorological satellites and the algorithms developed based on these satellites have great potential to be used in future operational work.

  • Maps risk generations for volcanic ash monitoring using modis data and its aplication in risk maps for aviation hazard mitigation: Case of study popocatepetl volcano (Mexico)

    The volcanic products are deposited in the atmosphere as a result of volcanic eruptions. These materials are dispersed by the wind and can be deposited on the surface in airport facilities and the finest fraction can remain long affecting airspace. Using tools such as wind patterns studio in height and track volcanic clouds with satellite images can identify areas of high probability of being contaminated with ash depending on the season and the intensity of the eruption. In this work two patterns of ash dispersion by wind are identifiedNovember to May transporting the ash has a higher probability NE to the ESE direction. During the months of July to September transporting ash would displace mainly towards the SW to W, with the months of May and October transition.



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