Centre for Geohazard Observations

The mission of the Centre for Geohazard Observations is to install, maintain, and manage the EOS’s geohazard observation networks in and around Southeast Asia. It aims to achieve high serviceability of the networks to consistently record quality data necessary to the fundamental research conducted by the Observatory.

Supporting Scientific Research

The Centre for Geohazard Observations (CGO) installs, maintains, and manages the Earth Observatory of Singapore’s (EOS) geophysical and other field instrumentation stations and networks spread over several countries in and around Southeast Asia. The CGO also conducts geophysical surveys in aid of research, providing support in various technical matters that include the acquisition, computing, and archiving of geophysical data. The Centre strives to provide an innovative and conducive technological environment for our scientists both in the field and in the laboratory. 

In providing effective technical and research support to the Observatory, CGO works closely with the Observatory researchers. Scientific requirements as well as technical and operational constrains are fully considered in all implementation and maintenance plans. CGO also works closely with our Southeast Asia collaborators, aiming to strengthen and expand the relationship to advance the regional geohazard research community.

Field Installations and Equipment

 
 

Seismic Network

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Seismic Network

The seismic networks, linked by a satellite-based communication system, monitor the tectonic motion in several earthquake hotspots within South and Southeast Asia, thus providing essential information for scientists to understand the earthquake potentials from these mega fault-systems on earth.

The CGO at EOS operates multiple seismic stations that monitor earthquakes and volcanic activities in real time and that can be linked with our cGPS stations. EOS works closely with other research institutes in Southeast Asia, including Philippine Institute of Volcanology and Seismology (PHIVOLCS), Center of Volcanology and Geological Hazard Mitigation (CVGHM) to operate the GPS and the seismic monitoring arrays. In the international collaboration, EOS provides important information about the current tectonic and volcanic activities, and receives a solid support from these research institutes to understand the regional earthquake and volcanic-related hazards.

The CGO at EOS is...

LIDAR

Terrestrial LiDAR

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Terrestrial LiDAR

The Earth Observatory of Singapore acquired a LIDAR (Light Detection and Ranging) in 2010. It is a RIEGL VZ-400, with a range up to 600m at Laser class 1, a repeatability of 3mm, and a measurement rate up to 125 000 measurements per second.

The LIDAR measures the distance to a target by emitting light pulses. This instrument can scan the topography with exquisite precision. LIDAR datasets are used in tectonics to map faults and earthquake rupture offsets: the accuracy of this instrument allows researchers to constrain precisely the slip-distribution of various faults in Asia; with complementary dating, scientists can also estimate earthquake cycles on a given fault. Sedimentologists also use the LIDAR to map precisely various outcrops.

This technique provides real topography through ultra-high resolution, vegetation free images of an area as large as several square kilometers. The CGO at EOS is fully capable of acquiring and processing Ground-LiDAR data.

Since...

Infrasound Monitoring System

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Infrasound Monitoring System

The infrasound monitoring system employed by EOS was first used to monitor volcanic eruptions from Indonesia. This monitoring system detects low-frequency sound waves, and the data collected will provide information on the location and explosivity of the eruption, allowing our scientists to determine the impact of volcanic ash on air traffic in and around Singapore.

The data from the Infrasound monitoring network contributes to the Tsunami early warning system, as it can detect the sound wave from the tsunami source well before the tsunami waves arrive the coastline.

EOS is currently developing its capacity of Infrasound monitoring in Singapore. The first part of its Infrasound system was installed in Singapore in August, 2013, to monitor distant volcanic eruptions. The station caught the infrasound signal from the Kelut volcano eruption in February, 2014.

This system, which can detect very low frequency sound waves in the air, provides very useful information...

Airborne LiDAR

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Airborne LiDAR

EOS has developed its capability of aerial acquisition of LiDAR data (Airborne- LiDAR). The CGO has carried out airborne-LiDAR surveys in Nepal and Myanmar. Compared to the Ground-LiDAR, the Airborne-LiDAR is suitable for large-area/regional high-resolution surveys. This technique provides real topography through ultra-high resolution, vegetation free images of an area as large as several square kilometers.

Myanmar-Bangladesh-Assam GPS Network

Myanmar-India-Bangladesh and Bhutan GPS Network

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Myanmar-India-Bangladesh and Bhutan GPS Network

EOS' Myanmar-India-Bangladesh and Bhutan GPS Network comprises stations along North-South and East-West transects.

The North-South transect is intended to measure the convergence across the Himalayan front and the Shillong Plateau.

The East-West transects will reveal the nature of strain accumulation across both the fold and thrust belt of the Indo-Burman Range and northern Sagaing fault.

The networks, linked by a satellite-based communication system, monitor the tectonic motion in several earthquake hotspots within South and Southeast Asia, thus providing essential information for scientists to understand the earthquake potentials from these mega fault-systems on earth.

The information collected from these monitoring stations also has the potential to improve the current tsunami early warning system after an major earthquake event. CGO at EOS is fully capable of selecting the optimal site for the GPS monitoring stations, installing and maintaining these...

Lab Volcano Facilities

Lab Volcano Facilities

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Lab Volcano Facilities

The purpose of the Lab Volcanoes is to understand the timing, rates and other details of the magma supply of different volcanoes, in order to improve forecasts of future eruptions. To this end, laboratory volcanoes display very diverse monitoring tools that provide a constant flow of data.

EOS has developed volcano laboratories at Mayon (Southeast Luzon, Philippines) and Gede-Salak (West Java, Indonesia). These volcanoes span a wide range of degassing behaviours: Mayon is an openly degassing volcano, while Gede and Salak exhibit only minor degassing. The nuances on the degassing spectrum displayed by these volcanoes make them very valuable for fundamental research.

 

Fieldwork Blog

New Seismic Network Sheds Light on Myanmar’s Tectonic Activity

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New Seismic Network Sheds Light on Myanmar’s Tectonic Activity

20 Nov 2017

Scientists have long known that Myammar is tectonically vulnerable. But only recently, says Dr Paramesh Banerjee, have they been able to understand the full extent of the country’s seismic activity. 

This new insight is made possible by the new Myanmar Seismic Network (MSN), established earlier this year. The network comprises 30 broadband seismometers, scattered throughout the country from the northernmost Kachin state, all the way to the Tenasserim Division in the south.

Dr Banerjee, Technical Director at the Earth Observatory of Singapore (EOS), led a team who built the network in collaboration with the Myanmar Earthquake Committee, and the Department of Meteorology and Hydrology in Myanmar.

The entire project took one year to complete–Dr Banerjee’s team began selecting possible sites to place the seismometers in July 2016, and the final seismometer station was constructed by July 2017.

At each of the 30 stations in the network, a high quality...

Inside Mount Mayon

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Inside Mount Mayon

05 Oct 2017

As a Research Associate at the Earth Observatory of Singapore (EOS), a large part of my work concerns studying the gaseous emissions from Mount Mayon, in the Philippines. In collaboration with the Philippine Institute of Volcanology and Seismology (PHIVOLCS), we are working to identify the composition of the volcano’s plume, which can help us better understand what is going on beneath the surface.

Measuring gases in a volcanic plume is by no means straightforward. We can quantify the flux of sulphur dioxide via the permanent monitoring network at Mount Mayon, but to retrieve values for other volatiles such as carbon dioxide, water, and hydrogen sulfide, we must sample the plume directly. For this we use a Multi-Gas Analyzing System (MultiGAS) designed by Research Geologist Peter Kelly of the United States Geological Survey.

The infamously majestic Mayon however, provides its own set of challenges with its summit at 2,462 metres (m) above sea level, atop a...

From Rooted Tree to Voyaging Boat

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From Rooted Tree to Voyaging Boat

05 May 2017

Different rainforest trees grow on an island called Siberut; one of four big islands of the Mentawai Archipelago located off the west coast of Sumatra, Indonesia. Katuka is what Mentawaians call one family of these dipterocarp trees. These trees have very hard wood and are widely used for construction and crafting.

I want to tell you the story of one katuka tree in particular. This 400-year-old tree will soon surrender its life to serve the needs of the people. 

A Giant Falls

As the sun rises over Siberut Island, a Mentawaian called Aman Ani and his fellow villagers sharpen their axes. They prepare their meals, as well as an offering for the forest spirits. Later, they sit quietly in a motorised canoe as they cruise upstream. Some of them are smoking cigarettes. All of them reflect, knowing they will soon execute a tree that has been standing on the island for nearly 400 years. As they approach the foot of a hill, the pilot slows the outboard...

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