Muhammad Hanif

• BRIN

The Matano fault is one of the fast-slipping faults in Indonesia with a slip rate of ~20 mm/yr, accommodating the motion between the Pacific and Australian plates. The fault has remained unruptured at least for the past two centuries. Recent paleoseismological study suggested that the Matano fault has accumulated enough slip for the next surface-ru...

The history eruption of the Banda volcanoes was recorded in 1632, 1816, and 1988 and was preceded by significant earthquakes. In the eruption in 2017, there were 28 volcanic earthquakes, indicating a rock cracking process due to the movement of magma in the form of gas, liquid, and rock solids. We suspect that when the earthquake occurs, the rock-c...

Sumatra Island and its surroundings, Indonesia, are one of the most active tectonics in the world. The Aceh-Andaman earthquake, one of the most destructive earthquakes in the world, occurred there. It has attracted many earth scientists to apply various methods, including seismic tomography, to understand the island's subsurface structure and tecto...

The present study examines the underlying structures and Moho depth’s geological implications in Central Sulawesi. Comprehending the underlying features of this area is essential for evaluating seismic risks and geological mechanisms. From the World Gravity Map 2012 (WGM 2012), we used a 2D radially-averaged power spectrum analysis of Bouguer gravi...

The cities of Jakarta and Bandung, two vital hubs in the western part of Java, are now connected by a high-speed rail line. However, potential earthquake hazards arise as the line intersects two active faults in West Java. To address this concern, we conducted a detailed geomorphological analysis using high-resolution DEM data (8-meter resolution)...

Traces of past landslides were found on the seabed of Palabuhanratu Bay, West Java. This landslide is thought to have generated a tsunami, but has never been investigated before. This bay is located around the western part of the Cimandiri Fault which is an active horizontal fault with a length of 100 km. Therefore, it is necessary to study the pot...

The subducting Indo-Australian plate along the Sunda Arc has various degrees of roughness near the trench. The variation in the subducted plate’s seafloor morphology should affect the upper plate’s dynamic at the forearc region and further in land, which would appear in the form of variation in seismicity along the arc. In this paper, we explored t...

In active fault studies, electrical resistivity tomography (ERT) with wide electrode spacing (10 m) and fewer than 60 electrodes is typically utilized. However, this configuration limits the ability of ERT to resolve detailed geological information, such as fault geometry and motion, small-scale offset, and thickness of Quaternary layers. High-reso...

Understanding the evolution of magma storage conditions on volcanoes which have had more than one caldera-forming eruption (CFE) is important to know about past and present conditions, as a key to forecast future potential hazards. Krakatau volcano is characterized by cyclic phases of growth and destruction of the edifice. A volcanostratigraphic st...

Sumatra Island and its surroundings, Indonesia, are one of the most active tectonics in the world. The Aceh-Andaman earthquake, one of the most destructive earthquakes in the world, occurred there. It has attracted many earth scientists to apply various methods, including seismic tomography, to understand the island's subsurface structure and tecto...

The Ambon fault in the northern Banda Arc has capability of generating M w 6.9 earthquake. The Ambon fault poses a significant seismic hazard to Ambon Island because the fault is located near populous areas, the Ambon City. Recent seismicity in Ambon Island and surrounding areas indicates that this region is actively deforming. Ambon Island has exp...

Renun Segment is located in the center of the Sumatran Fault, parallel to the Famous Toba Lake Volcano. The fault cuts the thick, and vast Young Toba Tuffs (YTT) deposited ∼74,000 years ago during the supervolcano eruptions. It shows a series of noticeable dextral strike-slip offsets of the river valleys that deeply incised the tuffs. Our study wil...

Edge detection in gravity imaging is commonly applied to localize significant changes for identifying the phenomena that might cause them. In this paper, we applied the techniques to the gravity anomaly data of Java Arc from satellite altimetry. The general main tectonic features can be observed from the free-air and the calculated simple Bouguer,...

The Baribis Fault is one of the active faults in West Java province. Research has been conducted on the identification of the fault using the gravity method. The survey aimed to illuminate geological structures such as fault, basin, horst. In this study, hundreds point around the Bandung to Pamanukan region covered the probable Baribis active fault...

The Mw 7.4 earthquake on September 28, 2018 in Palu-Donggala has resulted in significant fatalities and damages due to liquefaction and ground oscillation. Small-scale subsurface geological features on the zone are presumed to be a controlling factor for liquefaction. Therefore, we ran 130 microtremor measurements around the southern Palu region to...

The intermountain Cibunar area of the Garut basin periodically suffered from a drought and thus became a devastating hazard. Its fault structure as an impact of the extensional regime might affect the groundwater play as a transport or barrier system. The tectonic setting and its disruption of volcanic lithologies by faults make the area's hydrogeo...

The 7.4 Mw earthquake on 28 th September 2018 in Palu City triggered a flow liquefaction phenomenon in the Balaroa and Petobo areas, contributing to significant casualties and building damage. This paper presents the results of a liquefaction study to map subsurface conditions in these areas using the multi-electrode resistivity method with the dip...

Elucidating the Baribis active fault in the central part of West Java is challenging due to the lack of physiography appearance. A gravity survey was conducted on 838 stations around the North of Bandung to Subang region to identify its buried spatial fault continuity. Regular processing routine reduced the observed gravity acceleration to generate...

As demonstrated at Anak Krakatau on December 22 nd , 2018, tsunamis generated by volcanic flank collapse are incompletely understood and can be devastating. Here, we present the first high-resolution characterisation of both subaerial and submarine components of the collapse. Combined Synthetic Aperture Radar data and aerial photographs reveal an e...

The Cenozoic Bogor Basin situated on the SE edge part of Sunda shelf is presumed to have hydrocarbon potential on its turbidite deep-water play. The deep subsurface geometry of this basin may play an important role, yet unexplored, to the hydrocarbon exploration. The gravity method is advantageous to illuminate the subsurface structure on the arbit...

The flank failure and collapse of Anak Krakatau on December 22nd, 2018 triggered a destructive tsunami. Whether the prior activity of the volcano led to this collapse, or it was triggered by another means, remains a challenge to understand. This study seeks to investigate the recent volcano submarine mass-landslide deposit and emplacement processes...