Devy Kamil Syahbana

Devy Kamil Syahbana
Ministry of Energy and Mineral Resources | ESDM · Center for Volcanology and Geological Hazard Mitigation

Dr.

About

41
Publications
16,810
Reads
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469
Citations
Introduction
Researcher at the Indonesian Center for Volcanology and Geological Hazard Mitigation
Additional affiliations
October 2013 - April 2014
Helmholtz-Zentrum Potsdam - Deutsches GeoForschungsZentrum GFZ
Position
  • PostDoc Position
December 2009 - October 2013
Université Libre de Bruxelles
Position
  • Researcher
December 2009 - October 2013
Royal Observatory of Belgium
Position
  • Researcher
Education
November 2009 - November 2013
Universitè Libre de Bruxelles
Field of study
  • Volcano Seismology
December 2007 - June 2008
University of Namur
Field of study
  • Geology
August 1998 - March 2004
Bandung Institute of Technology
Field of study
  • Physics

Publications

Publications (41)
Article
We present results of our study aimed at understanding the dynamics of fluids inside a “wet” volcano through the analysis of swarms of long-period (LP) events accompanying the 2011 seismic unrest at Papandayan volcano, West Java, Indonesia. Prior to this unrest, we measured an extremely high percentage (100%) of CO2 in the ground at the summit crat...
Article
Full-text available
Forecasting explosive eruptions relies on using monitoring data to interpret the patterns and timescales of magma transport and mixing. In September 2017, a distal seismic swarm triggered the evacuation of around 140,000 people from Agung volcano, Bali. From satellite imagery and 3D numerical models, we show that seismicity was associated with a de...
Article
Full-text available
After 53 years of quiescence, Mount Agung awoke in August 2017, with intense seismicity, measurable ground deformation, and thermal anomalies in the summit crater. Although the seismic unrest peaked in late September and early October, the volcano did not start erupting until 21 November. The most intense explosive eruptions with accompanying rapid...
Article
Full-text available
In 2017, Mount Agung produced a small (VEI 2) eruption that was preceded by an energetic volcano-tectonic (VT) swarm (>800 earthquakes per day up to M4.9) and two months of declining activity. The period of decreased seismic activity complicated forecasting efforts for scientists monitoring the volcano. We examine the time history of earthquake fam...
Article
Routine analysis and detection of volcanic thermal features (VTFs) are available globally for low spatial resolution (>1 km/pixel) thermal infrared (TIR) sensors. However, medium resolution (90 m/pixel) ASTER (Advanced Spaceborne Thermal Emission and Reflection Radiometer) TIR data, which is sensitive to smaller and cooler VTFs, have yet to be syst...
Article
Full-text available
A volcano-Tectonic earthquake, commonly referred to as VT, is an earthquake caused by magma intrusion that increases the pressure below the volcano’s surface. The accumulation of stress that continuously affects the elasticity of rocks causes fractures when the elasticity limit of rocks is exceeded. VT is one of the earthquakes used as a parameter...
Article
Full-text available
We present an observation of morphological changes at Mt. Agung lava dome one year after the 2017–2019 eruption crisis using UAV-photogrammetry method. Five time-series UAV datasets involve the images collected during the crisis period and the newest data collection (July 16, 2020) were used to provide a detailed investigation of the changes in mor...
Article
Full-text available
Agung is one of active volcanoes in Indonesia, located on island of Bali. Since 1963, Agung has not had significant activity, until in September 2017 the volcano was active again which was marked by increased seismic activity and eruptions in November 2017. Therefore, to analyze the dynamics and processes of active volcanic eruptions requires an un...
Article
Full-text available
Shear-wave splitting (SWS), or the propagation of two independent shear waves, can be used as an indicator of seismic anisotropy. In this study, we utilize this concept using aftershock data of the 2018 Lombok earthquake which had been acquired in period of August 4 – September 9, 2018. The goal of this research is to better understand the crack di...
Article
Full-text available
This study provides an attempt to analyze the pre-eruptive seismicity events for volcano eruption forecasting. After more than 50 years of slumber, Agung volcano on Bali Island erupted explosively, starting on November 21, 2017. The eruption was preceded by almost 2 months of significant increase of recorded seismicity, herein defined as “seismic c...
Article
Full-text available
We develop and present a three-dimensional (3D) seismic velocity model of the source region of the 2018 Lombok, Indonesia earthquakes by employing local earthquake tomography. The data consist of 28,728 P- and 20,713 S-wave arrival times from 3,259 events which were recorded by 20 local seismic stations. The results show that most of the significan...
Article
Full-text available
Local seismic tomography is a well-known and commonly used method for obtaining detailed information about the internal structure of volcanoes. The eruption of Mt. Agung in 2017 was a vital opportunity scientifically because it is the first eruption that had sufficient seismic observation networks to carry out local seismic tomography at this volca...
Article
Mount Agung (the highest volcano in Bali, Indonesia) began to erupt on November 21, 2017, after having been dormant for 53 years. More than 100,000 people were evacuated within the hazard zone between September 2017 (when the highest volcanic alert was issued) and early 2018. The eruptions continued until June 2019, accompanied by at least 110 expl...
Article
Full-text available
The cross-correlations of ambient seismic noise at Sinabung Volcano were analyzed from February 2013 to February 2014. Many eruptions occurred during these periods, started on 15 September 2013. Looking at the variations in the coda of the correlations, two types of measurements can be distinguished associated to two types of changes: relative velo...
Article
Full-text available
The first gas and thermal measurements at the summit of the Gamalama volcano indicate that the system is dominated by hydrothermal processes. This is highlighted by the prevalence of H2S over SO2 (H2S/SO2 = 2–8), a high CO2/SO2 ratio (76–201), and a low heat transfer (3.0 MW) to the surface. A relative variation in gas composition is observed along...
Article
Full-text available
Awu is a remote and little known active volcano of Indonesia located in the northern part of Molucca Sea. It is the northernmost active volcano of the Sangihe arc with 18 eruptions in less than 4 centuries, causing a cumulative death toll of 11,048. Two of these eruptions were classified with a Volcanic Explosivity Index (VEI) of 4. Since 2004, a l...
Article
Full-text available
The little-known Awu volcano (Sangihe Islands, Indonesia) is among the deadliest, with a cumulative death toll of 11 048. In less than 4 centuries, 18 eruptions were recorded, including two VEI 4 and three VEI 3 eruptions with worldwide impacts. The regional geodynamic setting is controlled by a divergent-double-subduction collision and an arc–arc...
Article
Full-text available
The island of Lombok in Indonesia is located between the Indo-Australian and Eurasian subduction trenches and the Flores back-arc thrust, making it vulnerable to earthquakes. On 29 July 2018, a significant earthquake Mw 6.4 shook this region and was followed by series of major earthquakes (Mw>5.8) on 5, 9, and 19 August, which led to severe damage...
Article
Full-text available
Gamkonora is an active volcano capable of intense manifestations that regularly forced thousands of inhabitants to flee their villages. The most extreme eruption, in 1673, was a VEI 5 event that induced pitch-dark environment over the region. Paradoxically, little is known about Gamkonora volcano and here we present the first gas measurement result...
Preprint
Full-text available
Abstract. The little-known Awu volcano (Sangihe Islands, Indonesia) is among the deadliest, with a cumulative death toll of 11 048. In less than 4 centuries, 18 eruptions were recorded, including two VEI 4 and three VEI 3 eruptions with worldwide impacts. The regional geodynamic setting is controlled by a divergent-double-subduction collision and a...
Article
Full-text available
The Agung-Batur Volcanic Complex (ABVC), part of the Sunda volcanic arc, is the source of some of the most hazardous volcanic activity in Indonesia. The ABVC has undergone many small (VEI 1-2) eruptions since historical records began in the early 19th century, but Mt. Agung has experienced much larger (VEI 5) eruptions, both in the modern (1963) an...
Poster
Full-text available
Here we analyze the cross-correlations of ambient seismic noise around Mount Agung from April 2017 to February 2018 using the vertical component signals of three short-period seismometers located on the flanks of Mount Agung and its neighbour Mount Batur (18 km NW of Agung). We use two pairs of stations (BTR-PSAG and PSAG-TMKS) to compute the relat...
Thesis
Full-text available
Volcanic eruptions are commonly preceded by increased level of activity associated with magma over-pressurization within volcano plumbing system. Magma migration to the surface will result micro earthquakes at volcano and lead to the changes in seismic velocity and physical properties of medium. Seismic velocity variation can be detected by ambient...
Article
Full-text available
Relative velocity variations as result of ambient seismic noise cross-correlations at Gamalama volcano are analyzed using Moving Windows Cross Spectrum method. The drop of relative velocity variation were observed for each station pairs 20 – 40 days before the 4th October 2018 eruption. Spatial distribution of relative velocity variation shows that...
Article
Full-text available
This study investigates phreatic eruptions at two similar volcanoes, Kawah Ijen (Indonesia) and White Island (New Zealand). By carefully processing broadband seismic signals, we reveal seismic signatures and characteristics of these eruptions. At both volcanoes, the phreatic eruptions are initiated by a very-long-period (VLP) seismic event located...
Article
Full-text available
Gunung api Lokon merupakan salah satu gunung api aktif di Indonesia. Gunung Lokon terletak di kota Tomohon, Sulawesi Utara. Salah satu jenis klasifikasi gempa bumi pada Gunung api yaitu gempa Tornillo. Gempa Tornillo terjadi pada gunung api yang berada pada wilayah sesar tepatnya zona rekahan dangkal dimana rekahan mengalami getaran karena terisi o...
Article
Full-text available
Papandayan (2665 m asl) is an Indonesian stratovolcano located at 50 km from Bandung in west Java and characterized by an intense hydrothermal activity. An advanced alteration takes place where acid fluids interact with rocks, weakening the edifice, so that even minor explosive eruptions threaten the stability of its flanks. The purpose of the curr...
Article
Full-text available
Eruptions of Sinabung volcano, Indonesia have been ongoing since 2013. Since that time, the character of eruptions has changed, from phreatic to phreatomagmatic to magmatic explosive eruptions, and from production of a lava dome that collapsed to a subsequent thick lava flow that slowly ceased to be active, and later, to a new lava dome. As the eru...
Article
Full-text available
Located on Halmahera island, Dukono is among the least known volcanoes in Indonesia. A compilation of the rare available reports indicates that this remote and hardly accessible volcano has been regularly in eruption since 1933, and has undergone nearly continuous eruptive manifestation over the last decade. The first study of its gas emissions, pr...
Conference Paper
Full-text available
Indonesia consists of 127 active volcanoes, that causing Indonesia has a very active seismic activity. The observed temporal variation in the complex frequency analysis of Tornillo earthquake in this study at Lokon Volcano, North Sulawesi occured during the period from January 1 to March 17, 2016. This research was conducted using the SOMPI method,...
Article
In our response work during the Sinabung and Kelud eruption crises we find the following the be essential to effective mitigation:
Article
Volcanic lakes provide windows into the interior of volcanoes as they integrate the heat flux discharged by a magma body and condense volcanic gases. Volcanic lake temperatures and geochemical compositions therefore typically serve as warnings for resumed unrest or prior to eruptions. If acidic and hot, these lakes are usually considered to be too...
Article
Full-text available
Volcanoes with crater lakes and/or extensive hydrothermal systems pose significant challenges with respect to monitoring and forecasting eruptions, but they also provide new oppor- tunities to enhance our understanding of magmatic–hydrothermal processes. Their lakes and hydrothermal systems serve as reservoirs for magmatic heat and fluid emissions,...
Article
Full-text available
Abstract: The magmatic – hydrothermal system of Kawah Ijen volcano is one of the most exotic on Earth, featuring the largest acidic lake on the planet, a hyper-acidic river and a passively degassing silicic dome. While previous studies have mostly described this unique system from a geochemical perspective, to date there has been no comprehensive g...
Article
Full-text available
Two different ambient seismic noise techniques allow the determination of velocity models at Ijen caldera and Kawah Ijen volcano. At Ijen caldera, two average velocity models are constrained down to a depth of 3 km by inverting the stacked dispersion curve obtained by ambient noise cross-correlation. In addition, four local velocity models were obt...
Article
Since 2010, the Kawah Ijen volcano has been equipped with seismometers and its extremely acid volcanic lake has been monitored using temperature and levelling sensors, providing unprecedented time resolution of multi-parametric data for an acidic volcanic lake. The nature of stress and mass changes of the volcano is studied by combining seismic ana...
Article
Full-text available
Kawah Ijen is a composite volcano located at the easternmost part of Java island in Indonesia and hosts the largest natural acidic lake in the world. We have gathered all available historical reports on Kawah Ijen’s activity since 1770 with the purpose of reviewing the temporal evolution of its activity. Most of these observations and studies have...
Article
In order to improve our understanding and enhancing the knowledge about structures and dynamics of geothermal reservoirs for geothermal exploration and a sustainable use of the resource, we assess geothermal reservoirs with an integrated multi-scale and multi-disciplinary approach. A passive seismic monitoring study started in October 2012 with the...

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Projects

Projects (3)
Project
Research and development in Volcano-Seismology. Including earthquake location and relocation, event- or noise-based monitoring and multi-disciplinary monitoring of volcanoes and hydrothermal systems.