Analysis of Landslide and Land Subsident Using Geophysical Method in the East Java Province, Indonesia

East Java Province, which is geologically very complex, often occurs natural disasters, especially landslide and land subsidence. The area of East Java is divided into 3 parts, namely the southern part which is the result of volcanic lahar, and also the uplift from the southern sea. Those two kinds of sediment, geologically is quarter and tertiary volcanic deposits age, and limestone. The Middle part, is a cluster of active volcanoes that are quarter old, which provide quarter-aged sediments and these area is rich in geothermal. The Northern part, which is a sediment from the Java Sea and the Madura Strait, with several limestone mountains, is an area rich in hydrocarbons. The area to be studied is the Southern area, namely the quarter sediment from volcanic lava and the lifting of limestone which has the potential to occur landslides and land subsident. The landslide and land subsident symptoms will be analyzed using the geophysical method, to predict the landslide volume and also the dangerous areas with regard to the land subsident.

International Value of The Potential Al-Medina Volcanic Global Geopark in Saudi Arabia Revealed From Multi-Satellite Remote Sensing Data

The Global Geopark must be of international importance in terms of their scientific quality, rarity, aesthetic appeal and education value. The Saudi Arabia, as one of the important node countries along the Belt and Road, has developed at least nine Cenozoic basaltic volcanic lava fields in the western part, with a total area of 180,000 km2. In this paper, the geological and geomorphic features of volcanic lava fields in western Saudi Arabia induced by the expansion of the Red Sea are interpreted using multi-source satellite images, such as Moderate-resolution imaging spectroradiometer (MODIS), Landsat-8 OLI (Operational Land Imager) and Gaofen-2 data. Our results show that the Al-Medina volcanic field (AMVF) has great advantages to become the potential volcanic Global Geopark in Saudi Arabia. This study indicates that : 1) AMVF has special international geo-scientific significance and rare natural attribute in geodynamic mechanism and lithologic characteristics; 2) AMVF has abundant volcanic landscapes, including completely preserved cones and craters and multi-phase lava flows from different eruption stages, which have great aesthetic appreciation and education values to attract the general public; 3) AMVF is close to the second holy city of Islam-Medina city, which has convenient transportation and is suitable to develop tourism to promote the local economy development; 4) AMVF had erupted repeatedly (the latest eruption was in 1256 AD), establishment of the Global Geopark can not only prevent potential geological hazard risks to Medina city from future volcanic eruptions, but also provide better protection and conservation to geoheritage sites being damaged by human activities.

Performance Evaluation of Coating Materials Containing Perlite-Volcanic Lava Stone-Carrot Pulp Ternary System

Cellulose in the fibrous structure, which is the main structural component in the cell wall of plants, was formed by the combination of three thousand or more glucose molecules and was a natural polymer synthesized by many living microorganisms. In this study, it was aimed to observe the performance of carrot pulp physically added to water-based coating to increase the viscosity of the coatings. In addition, volcanic lava stone (red pumice stone) and perlite stone were added to the coating to improve its properties that heat transfer, adhesion, hydrophobicity, corrosion resistance. The effect of cellulose-based material on the viscosity of the coating was determined using the Design Expert Optimization Method. In this experimental design method, the experimental set was created to be “carrot pulp, volcanic lava stone, and perlite stone” and additives was added as 0-6% by weight of the coating. By using this method, the most suitable process parameters were determined, and the effects of the additives added to the coating were examined, comparatively. As a result, it was found that cellulose derived organic additives and other additives improved the various properties of coating and could be evaluated for industrial coatings.

KINERJA MARSHALL CAMPURAN BERASPAL PANAS LAPIS (AC-BC) MENGGUNAKAN LIMBAH BETON

<span><em>In a State infrastructure development is needed for the progress of a nation. This is very important. It </em><span><em>should be seen in terms of social, economic, and also have a positive interest because they have to </em><span><em>increase development and economy. However, in the past will require new material. One effort to get</em><br /><span><em>new material is by mining sand or rock from the volcanic lava flow deposits. The aforementioned issues </em><span><em>are a strong driver in the development of asphalt pavement technology to obtain durable, inexpensive </em><span><em>and environmentally friendly pavements including in Indonesia, which helps minimize the existence of </em><span><em>natural destruction, one of which is related to using water material for paving new roads has done a lot. </em><span><em>One of the waste materials that will be tried to be replaced by new aggregates in this study is concrete</em><br /><span><em>waste. variation of concrete waste of 0%, 5%, 10%, 15% of the total new aggregate. Then testing the </em><span><em>object of the test with the Marshall test method obtained results of Marshall characteristics on the test. </em><span><em>Based on the results of the study, the use of concrete waste as coarse aggregate on Marshall</em><br /><span><em>kararteristic values in the AC-BC mixture. The greater absorption of concrete waste causes asphalt to </em><span><em>be absorbed more than when mixed without using concrete waste. From the analysis results obtained </em><span><em>negative values, VMA, VIM and Marshall Quotient increase the increase, while the flow value and VFB </em><span><em>increase decrease with increasing levels of concrete waste. The highest value was obtained at 15% </em><span><em>concrete waste content that is 1807.1kg, the highest VMA value was obtained at 15% waste content </em><span><em>that was 18.81%, the greatest VIM value was obtained at 15% concrete waste content level that was </em><span><em>10.06%, Marshall value The highest was obtained at 5% concrete waste content which was 748.70kg /</em><span><em>mm, the highest flow value was obtained at 15% concrete waste content which was 5.82mm and the </em><span><em>highest VFB value was obtained at normal levels that was 99.91%.</em></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span><br /><br class="Apple-interchange-newline" /></span>

Exploring Community Symbiotic Tourism Programs for the Utilization and Conservation of Ecology in Lava Stony Forest (Gotjawal) of Jeju Island, Korea

According to our research findings, the future-oriented conservation of natural ecological resources in the Sahn-Yang Gotjawal area should be shaped and formed in a sustainable ecological way to improve the economy of the Sahn-Yang area. This study covers a systematic and quantitative assessment of the function, design, and purpose of establishing a regional eco-tourism program using the Sahn-Yang Gotjawal (Volcanic Lava Stony Forest) natural resources of Jeju Island, South Korea. Although citizens’ interest in Jeju Gotjawal has increased, reckless exploration and damage still occurred. There were improvements on the movement to preserve geological features and the ecosystem. However, unfortunately the negative effects of only seeking development opportunities without regard to the environment was realized as well. Through strengths, opportunities, aspirations, results (SOAR) analysis, various potential situations and conditions using the Sahn-Yang Gotjawal resources were analyzed with quantitative and qualitative techniques. In addition, through media analysis, the benefits and opportunities that the Gotjawal resources could provide the citizens were identified and the results were combined with SOAR analysis to present an integrated vision. In order to make wise use of Sahn-Yang Gotjawal, such as conserving, sustaining, and creating accessibility (guided by SESs), it is necessary to concentrate on the ‘strengths’ such as creating and maximizing attractions which can develop management programs such as preservation research and monitoring, as well as establishing sustainable usage of facilities such as visitors’ gathering spaces, exploration activities, and convenient facilities.

Puyango, Ecuador Petrified Forest, a Geological Heritage of the Cretaceous Albian-Middle, and Its Relevance for the Sustainable Development of Geotourism

Geodiversity treaties have multiplied and given rise to geological heritage as a singular value of protection and preservation for territories. The Puyango Petrified Forest (PPF) is a recognized Ecuadorian reserve, which was declared a National Heritage Treasure. It has an area of 2659 hectares, and it is located in the south of Ecuador, between the provinces of El Oro and Loja. The petrified trunks and trees were buried by volcanic lava, dating from the Cretaceous Period, 96 to 112 million years ago. Thus, silicification and carbonization, two important fossilization events, have produced hundreds of samples of paleontological wealth in Puyango. The objective of this work is to methodologically assess the geodiversity of a fraction of the PPF by registering its geological heritage and value for its preservation and sustainable development. The methodology is based on: (i) Analysis of information on the territory used for tourist visits, as a pilot study area. Presentation of paleontological components and their main sections to enhance their geotouristics value; (ii) Assessment of the geological heritage for its geotourism categorization with a recognized scientific methodology and one proposed by the co-authors propose; and (iii) Analysis of Strengths, Weaknesses, Opportunities, and Threats (SWOT) as a guide for protection and development strategies. Findings reveal the high geotourism potential for a Geopark Project in Puyango, since only 300 hectares are used for tourism and the remaining area is a virgin environment for research and improving knowledge of geodiversity and biodiversity.

PENINGKATAN KONSENTRASI ANAK MELALUI METODE EKSPERIMEN MEMBUAT LAVA GUNUNG MERAPI

This study aims to increase the concentration of children through the experimental method of making volcanic lava in HARAPAN BUNDA PAUD, Karang Tinggi Village, Karang Tinggi District, Central Bengkulu. This type of research is classroom action research (PTK). The subjects in this study were all children aged 5-6 years old, consisting of 24 children. Data collection techniques are done using observation, documentation. The results of the research after the implementation of playing activities to make Mount Merapi lava using experimental methods to increase children's concentration with the theme of the universe of the mountain sub-theme, the sub-themes of Mount Merapi in pre-cycle only reached 35.75% and in the first cycle, the first meeting reached 55.75%. the second meeting reached 64.25%. In the second cycle, the first meeting reached 83.75% and in the second syllable, the second meeting reached 86.75%, each indicator of creativity increased to 83.3%, which increased to 20 children from 24 children. This change is because in the first cycle the child does not get a direct approach, and the child is less interested in the game being carried out, while in the second cycle the child gets a direct approach and the child is interested in the game.

Mantle Convection in Terrestrial Planets

All the rocky planets in our solar system, including the Earth, initially formed much hotter than their surroundings and have since been cooling to space for billions of years. The resulting heat released from planetary interiors powers convective flow in the mantle. The mantle is often the most voluminous and/or stiffest part of a planet and therefore acts as the bottleneck for heat transport, thus dictating the rate at which a planet cools. Mantle flow drives geological activity that modifies planetary surfaces through processes such as volcanism, orogenesis, and rifting. On Earth, the major convective currents in the mantle are identified as hot upwellings such as mantle plumes, cold sinking slabs, and the motion of tectonic plates at the surface. On other terrestrial planets in our solar system, mantle flow is mostly concealed beneath a rocky surface that remains stagnant for relatively long periods. Even though such planetary surfaces do not participate in convective circulation, they deform in response to the underlying mantle currents, forming geological features such as coronae, volcanic lava flows, and wrinkle ridges. Moreover, the exchange of material between the interior and surface, for example through melting and volcanism, is a consequence of mantle circulation and continuously modifies the composition of the mantle and the overlying crust. Mantle convection governs the geological activity and the thermal and chemical evolution of terrestrial planets and understanding the physical processes of convection helps us reconstruct histories of planets over billions of years after their formation.

Field Intensity changes during the past 40 ka

&lt;p&gt;The period encompassing the past 40 ka is crucial to constrain the characteristic time of the axial dipole, which is computed so far from the historical period and still fails to be tested against long-term field changes. The past 7 kyr of geomagnetic history are primarily documented from archeological artefacts, yet the last 4 kyr remain relatively poorly constrained. Beyond this period, we are dealing with long-term changes of the dipole field that are relatively poorly documented by sedimentary records or by volcanic lava flows. Many measurements of absolute paleointensity do not incorporate directional information, while it is crucial to document the entire field vector and consequently can only be analyzed in terms of virtual axial dipole moments (VADM). In summary, no high resolution dataset covers the field changes which followed the Laschamp event and therefore we have poor knowledge of the pattern of fluctuations and the rate of the changes that were associated with the field recovery after the Laschamp. We have selected a set of marine sedimentary cores based on the quality of their oxygen isotope records. Their deposition rates are comprised between 10 and 20 cm/ka and therefore offer a great potential to constrain the filed intensity changes with a resolution of the order of 100 ka. during this period. We will present the results obtained from 7 marine core records and investigate their common and their discrepant features in order to identify the true paleointensity signal.&lt;/p&gt;&lt;p&gt;&amp;#160;&lt;/p&gt;