Danang Sri Hadmoko

Universitas Gadjah Mada | UGM · Faculty of Geography

Merapi is a two-sided, paradoxical volcano: on the one hand 1.8 million people live on its flanks. It is one of the most densely populated volcanoes on Earth, with population densities averaging 764 inhabitants per square kilometre within a 10 km radius from the summit. The main reasons for the high densities are land resources and associated livel...

Desertification and dune progression over vegetation is quantified using remote sensing data, but vegetation, eventually temporarily, buried under sand blowout may escape such assessment, and to estimate the extent of buried vegetation, a GPR campaign was conducted over the coastal sand-dune of Tottori Prefecture (Japan) in combination with a high-...

This is the first study discussing the dynamics of two caldera-forming eruptions in the Banda volcanic complex (BVC) in the marine conservation zone of Banda, Maluku, Indonesia. The first and second caldera episodes are, hereafter, termed as Banda Besar and Naira, respectively. The formation of Banda Besar caldera (ca. 8 × 7 km) ejected homogeneous...

Spatial approaches, based on the deformation measurement of volcanic domes and crater rims, is key in evaluating the activity of a volcano, such as Merapi Volcano, where associated disaster risk regularly takes lives. Within this framework, this study aims to detect localized topographic change in the summit area that has occurred concomitantly wit...

Historical and archaeological findings have revealed that many human civilizations have been strongly affected by natural hazards, such as volcanic eruptions. An issue that still lacks attention is the response of ancient populations following eruptions as well as their resilience strategies. Three written sources from Lombok, Indonesia, provide de...

Being known as a small island with the highest volcano in North Maluku Province, Tidore Island is also famed for its exotic ecotourism potential. There are many benefits for areas that have good ecotourism potential, but it is necessary to consider the potential for local disasters. Kie Matubu Volcano is currently in a dormant status and is likely...

Spatial approach based on the deformation measurement of volcanic dome and crater rim is key to evaluate the activity of a volcano, such as Merapi volcano where associated disaster risk is regularly taking lives. Within this framework, this study aime to detect localized deformation and change in the summit area that has occurred concomitantly with...

Debris-flows are recurrent events on mountain- and hill- slopes, and they have been the object of numerous field investigations and sampling, however most of this work reposes on imagery and outcrop analysis, in such a way that there are still only a handful of studies investigating the internal architecture of these events’ deposits. In the presen...

A study of volcanic hazard knowledge and preparedness of communities living on the flanks of Gamalama Volcano, on the small island Ternate, was conducted in January–February 2019. A total of 1265 respondents participated in a questionnaire-based survey using 42 questions to inquire about community knowledge of natural disasters and volcanic hazards...

Akuisisi data, bertujuan untuk mengambil data awal, merupakan salah satu tahapan dalam metodologi penambangan data. Data awal akan diproses menjadi data akhir yang digunakan untuk proses pemodelan, seperti pembuatan model untuk memprediksi potensi terjadinya tanah longsor. Data prediksi curah hujan yang disediakan oleh Badan Meteorologi, Klimatolog...

Gamalama is an active stratovolcano on Ternate, a small volcanic island in Maluku Utara, Indonesia. Since 1510, a total of 77 eruptions have been recorded, with various impacts on the population and environment on the island and its surroundings. In July 2015, Gamalama erupted after < 24 h of precursor signs. The seismic activity continued to incre...

Investigating past eruptions gives a unique opportunity to understand volcanic hazards, particularly in Indonesia, where volcanic eruptions occur frequently. Here, we present the first reconstruction of the eruptive history of the Ternate and Tidore Islands (North Maluku, Indonesia) over the past 22,000 years cal. BP, based on a new identification...

Kiematubu volcano is often considered as non-volcanic, even though it consists of basalt material, since it has never erupted before. In fact, that small volcanic islands have a high risk due to their restriction on means and resources. The study aims to assess the social vulnerability of the community in Tidore Island that may be exposed to the er...

Tidore and Hiri Islands in North Maluku Province is the result of a complex tectonic setting. In contrast with Ternate Island and its well-known volcano, Gamalama volcano, there is still a lack of research about volcanic information or volcanic landform in Tidore and Hiri Islands. Even though the two islands also have volcanoes, i.e., Hiri and Tido...

This article presents the characteristics of the small islands of Tidore and Hiri, which are vulnerable to the dangers of volcanic eruptions in Indonesia. The physical condition of the area is very important for carrying out a sustainable disaster risk reduction analysis; therefore, climate and topographic data are important to know. The limited av...

The research set out to analyze coastal typology characteristics and ecotourism development through geomorphosite assessments and suggest fitting management strategies in East Lombok, Indonesia. In this research, the connection between ecotourism potentials and coastal typologies was investigated. The methods of this research were conducted using a...

Lombok Island in Indonesia was hit by four major earthquakes (6.4 Mw to 7 Mw) and by at least 818 earthquakes between 29 July and 31 August 2018. The aims of this study are to measure ground deformation due to the 2018 Lombok earthquake series and to map its spatio-temporal distribution. The application of DinSAR was performed to produce an interfe...

This paper discusses the relations between the impacts of volcanic eruptions at multiple-scales and the related-issues of disaster-risk reduction (DRR). The review is structured around local and global impacts of volcanic eruptions, which have not been widely discussed in the literature, in terms of DRR issues. We classify the impacts at local scal...

Indonesia is exposed to earthquakes, volcanic activities, and associated tsunamis. This is particularly the case for Lombok and Sumbawa Islands in West Nusa Tenggara, where evidence of tsunamis is frequently observed in its coastal sedimentary record. If the 1815 CE Tambora eruption on Sumbawa Island generated a tsunami with well-identified traces...

The economic downturn at the start of the 21st Century combined with the rise of new economies have helped propelling the need for cheaper, rapid and yet accurate data acquisition methods, including point-cloud producing technologies. As population is ageing in countries like Japan or Taiwan, and as climate change is bound to increase the frequency...

The debris avalanche deposit (DAD) coverage can drastically modify the surrounding landscape of volcanoes. DAD can be distinguished by hummocky irregular surface, jigsaw fissure, and mixing horseshoe shape. Due to its particular shape of a hummock, the topography can be easily identified using DEM (Digital Elevation Model) and satellite imagery. Th...

Yogyakarta is one of the large cities in Central Java, located on Java Island, Indonesia. The city, and the Pleret sub-district, where the study has taken place, is prone to earthquake hazards, because it is close to several seismically active zones, such as the Sunda Megathrust and the active fault known as the Opak Fault. Since a devastating eart...

div class="WordSection1"> Abstr ak. Penelitian ini bertujuan untuk membuat pemodelan aliran lahar Gunung Merapi di Sungai Boyong. Selain itu penelitian ini juga mengidentifikasi penggunaan lahan yang terdampak dari model tersebut, serta menganalisis risiko kerugiannya menjadi fokus penelitian ini. Pemodelan aliran lahar dibuat menggunakan aplikasi...

Ternate Island is a volcanic island formed by the product of Gamalama volcano since thousands of years ago until the present time. It covers 111.4 km 2 and inhabited by more than 200,000 people. Its small size and dense population make it vulnerable to eruption hazards. This study aims to analyze the Gamalama volcano eruption hazard and the challen...

Indonesia merupakan salah satu negara yang dilalui oleh Cincin Api Pasifik. Lebih dari 400 gunungapi berada pada jalur tersebut dan 130 diantaranya masih aktif hingga sekarang. Erupsi gunungapi menghasikan material dari ukuran kecil (abu, pasir, kerikil) hingga ukuran besar (bongkah). Material – material yang keluar dari vent, sebagian akan diendap...

Tingkat kerentanan fisik bangunan terhadap potensi erupsi Gunungapi Kelud

Tsunami, as a secondary hazard, can be triggered by tectonic earthquakes with its epicenter in the ocean floor, submarine volcanic eruptions, submarine landslides, meteor, or bomb at the ocean. Although volcanic eruption-induced tsunami events rarely happen, however, some events ever had a major impact, e.g., the 1741 CE eruption of Oshima-Oshima V...

One of the most powerful eruptions of the Holocene, known as the Samalas eruption, had a VEI of 7 and took place on Lombok, eastern Indonesia in 1257 CE. Thick tephra fall covered the entire island, and pyroclastic density currents (PDCs) up to 50 m thick buried almost half of Lombok. Until now, there has been no detailed study of the geomorphologi...

In 2012, about 1.3 million people lived on the slopes of Merapi, one of the most active volcanoes in the eastern part of Java Island in Indonesia. A majority of Merapi inhabitants, grouped together in small villages, live off agricultural income, relying on hydraulic infrastructures for their daily activities. Not only do these farming activities r...

Yogyakarta City is one of the big city which is located in Java Island, Indonesia. Yogyakarta City, including study area (Pleret Sub District), are very prone to earthquake hazards, because close to several active earthquake sources. For example, Sunda Megathrust which often generates a big earthquake which can affect the study area. The Sunda Mega...

Following the 2010 VEI 4 eruption of Merapi volcano, more than 250 lahars were triggered during two rainy seasons from October 2010 to March 2012. This high number of post-eruption lahars mainly occurred in the Kali (valley) Putih watershed and was mostly associated with high-magnitude rainstorms. A lahar occurring on January 8, 2011, caused signif...

In 2006, Prof. Iverson from the USGS contacted groups of debris flow modelers all around the planet with a challenge: being able to replicate a simple debris flow that he and his team would be triggering in his large open-air flume. Although the project did not see the light because of funding constraints, it emphasizes the difficulties that scient...

Abstract This paper presents the application of Spatial Multi-Criteria Evaluation (SMCE) to assessing the vulnerability-resilience of at-risk communities alongside of the river channels on Kelud Volcano, East Java, Indonesia. The proposed method intends to bridge the gaps between the evaluations of resilience and vulnerability particularly since th...

The AD 1257 eruption of Samalas volcano in Lombok, Indonesia is well known as one of the largest volcanic eruption of the Holocene with a volcanic explosivity index (VEI) of 7. The estimated dense rock equivalent (DRE) volume of P4-Pyroclastic Density Current (PDC) deposits on the East of Lombok is more than 3,7 km3 with thickness up to 30 m. Due t...

Located approximately a hundred kilometres north of Java Subduction Zone, Java Island has a complicated geology and geomorphology. The north zone is dominated by the folded area, the centre is dominated by the active volcanic arc and the south of Java including the study area (Southeast part of Yogyakarta City), is dominated by the uplifted souther...

“24 March 2017” to “24–25 March 2016”

The Clapar landslide induced debris flow consisted of the Clapar landslide occurred on 24 March 2017 and the Clapar debris flow occurred on 29 March 2017. The first investigation of the Clapar landslide induced debris flow was carried out two months after the disaster. It was followed by UAV mapping, extensive interviews, newspaper compilation, vis...

Semeru Volcano is an active stratovolcano located in East Java (Indonesia), where historic lava flows, occasional pyroclastic flows and vulcanian explosions (on average every 5 minutes to 15 minutes) generate a stock of material that is remobilized by lahars, mostly occurring during the rainy season between October and March. Every year, several la...

Daerah Aliran Sungai (DAS) Pabelan merupakan salah satu sungai yang paling rawan mengalami banjir lahar pascaerupsi Gunungapi Merapi tahun 2010. Kejadian banjir lahar merusak di DAS ini terjadi sebanyak 17 kali sejak erupsi tahun 2010, terbanyak kedua setelah DAS Putih. Penelitian ini bertujuan mengidentifikasi wilayah rawan banjir lahar berdasarka...

The purposes of the research were (1), to determine the adaptation strategy of the peoples of Bedono village, Sayung sub-district of Demak regency in handling tidal flood disaster, and (2) to analize the implications of the tidal flood disaster for territorial resilience in the Bedono village Sayung sub-district of Demak regency. The research was q...

A detailed study had been conducted on the sediment of Mount Samalas’ volcanic eruption in 1257 AD. Using the framework of the reconstruction of the ancient eruption of Mount Samalas, the first step was to map and analyze the deposits of volcanic sediment. Secondly, we analyzed the effect of geomorphology and the distance function to the isopach th...

Java Island, the most populated island of Indonesia, is prone to landslide disasters. Their occurrence and impact have increased mainly as the result of natural factors, aggravated by human imprint. This paper is intended to analyse: (1) the spatio-temporal variation of landslides in Java during short-term and long-term periods, and (2) their causa...

The AD 1257 eruption of Samalas volcano (Lombok Island, Indonesia) is considered as one of the most powerful of the Holocene. It ejected more than 40 km3 of pyroclastic material, including a Dense Rock Equivalent volume of inland Pyroclastic Density Currents (PDC) up to 16 km3. The gap in the island’s history during this period suggests high human...

Kayangan Catchment, one of the extremely landslide susceptible areas in Indonesia, is situated on the eastern flank of Menoreh Mountain in Yogyakarta Province on the island of Java. Landslides cause land and infrastructure damages because of their frequency in human settlements. The objectives of this study are twofold: (1) to analyze the spatial d...

Background The Southeast of Yogyakarta City has had the heaviest damages to buildings in the 2006 of Yogyakarta Earthquake disaster. A moderate to strong earthquake of 6.3 Mw shook the 20 km southeast part of the Yogyakarta City early in the morning at 5:54 local time. On top of extensive damage in Yogyakarta and Central Java, more than 5700 people...

Scientific Reports 6 : Article number: 37745 10.1038/srep37745 ; published online: 01 December 2016 ; updated: 09 March 2017 The Acknowledgements section in this Article is incomplete.

Background Indonesia is one of the most earthquake prone countries in the world. More than 14,000 earthquakes of magnitude greater than 5 occurred in Indonesia between 1897 and 2009. Earthquakes are a major cause of slope instability eventually triggering coseismic landslides, which cost 1.5 million US$/ year in Java: one of the most densely island...

Humans have colonized and adapted to extremely diverse environments, and the genetic basis of some such adaptations, for example to high altitude, is understood. In some cases, local or regional variation in selection pressure could also cause behavioural adaptations. Numerous genes influence behaviour, such as alleles at the dopamine receptor locu...

Humans have colonized and adapted to extremely diverse environments, and the genetic basis of some such adaptations, for example to high altitude, is understood. In some cases, local or regional variation in selection pressure could also cause behavioural adaptations. Numerous genes influence behaviour, such as alleles at the dopamine receptor locu...

A rockfall susceptibility based on trajectory-energy/velocity approach needs release area or rockfall source. However, identification of rockfall source is not always possible for some areas in Indonesia. This paper presents a rockfall susceptibility zoning based on back analysis technique of rockfall deposit inventory in Gunung Kelir, Java. There...

Lahar has been applied as a general term for rapidly flowing, high-concentration, poorly sorted sediment-laden mixtures of rock debris and water (other than normal streamflow) from a volcano. Lahars are one of the most destructive phenomena associated with composite volcanoes, which are dominant in Java Island. Resulting deposits of lahar are poorl...

Java, the most densely populated island in Indonesia, is located on top of the most seismically active areas in Southeast Asia: the Sunda Megathrust. This area is frequently hit by strong earthquake. More than 3,300 M>5earthquakesoccurred between 1973-2014. The wide range of mountainous areas and high intensity of rainfall, make several part of the...

ABSTRAK Material piroklastik hasil erupsi Gunungapi Kelud 2014 yang tersebar di sekeliling tubuh gunungapi tersebut perlu dipetakan sebagai upaya dalam inventarisasi dampak bencana. Kegiatan pemetaan dapat dilakukan dengan bantuan teknologi penginderaan jauh melalui suatu skema klasifikasi citra. Terdapat berbagai algoritma dalam metode klasifikasi...

The Merapi is an active stratovolcano in Central Java with a dense network of rivers located at the bottom of deep radial valleys, which rapidly evolves during and in the aftermath of the regular eruptions. In the wake of the 2010 eruption, the authors have monitored the evolution of a section of the Gendol Valley between 6 and 11 km to the summit...

Lahar flow dynamics is still poorly understood due to the difficulty of data acquisition in the field. The eruption of the Merapi volcano (Indonesia) in October-november 2010 allowed us to collect new information in the frame of the SEDIMER research program (Sediment-related Disasters Following The 2010 eruption of Merapi Volcano, Java, Indonesia,...

Lahar damage to buildings can include burial by sediment and/or failure of walls, infiltration into the building and subsequent damage to contents. The extent to which a building is damaged will be dictated by the dynamic characteristics of the lahar, i.e. the velocity, depth, sediment concentration and grain size, as well as the structural charact...