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Sonntag, 26. Juni 2016

SEAMERGES AT WORK: RUPTURE/S-WAVE PROPAGATION





SEAMERGES AT WORK: ACTIVITIES

Introduction

SEAMERGES is a project funded under the ASEAN-EU University Network programme (AUNP), human resource development component, by the European Committee (EC) that started 1 January 2004 and will run for two years. The participants are university and research groups from the Netherlands, France, Indonesia, Malaysia and Thailand who are involved in geodetic education and geodetic research. The project entails a number of seminars on the applications of the Global Positioning System, Interferometric SAR and satellite radar altimetry: exchanged knowledge, methods and data will then be used to define and carry out research projects targeted to the South-East Asian region.

Update: The SEAMERGES partners have published their GPS results on the 2004 Sumatra-Andaman earthquake in Nature! Checkout the News and Quakes in SE Asia sections!

Summary

The aim of the SEAMERGES project is the transfer of knowledge, expertise and technology to SE-Asia to locally enable higher-level geodetic research and initiate implementation of applications for water management and risk assessment. It also aims at stimulating scientific cooperation among the different Asian countries. The initial target groups consist of selected staff and students of 3 local universities: the Institut Teknologi Bandung in Indonesia, the Universiti Teknology Malaysia in Malaysia, and the Chulalongkorn University in Thailand. Main activities include theoretical and training courses in 3 geodetic techniques (HRD), the setup of interdisciplinary research (pilot) projects involving all partners, and the organization of a final international symposium. Besides the 3 university groups in SE-Asia (ITB, UTM, and Chula) the partnership includes DEOS (Delft University of Technology, Netherlands) and ENS (Ecole Normale Superieure, France).

Objectives

  1. Transfer moderate and expert scientific knowledge and associated technologies in the field of earth-oriented space research to the ASEAN countries, which are tailored to their needs;
  2. Improve research capability in the participating ASEAN countries, which would in turn allow for better and mujtual beneficiary cooperation between ASEAN and EC countries on the higher-education and scientific research levels;
  3. Encourage more comprehensive and efficient studies in the region of SE-Asia in the fields of space geodesy, geodynamics and the assessment and monitoring of environmental risks. These future ASEAN co-lead research projects should also stimulate the participation and the sharing and transfer of knowledge of other ASEAN countires not included in this project;
  4. Help the ASEAN countries to become full and respected members of the international scientific community. Both direct (graduated students) and indirect (through research projects and technology spin-offs) also the civil and industrial community would benefit from the project's HRD and combined research efforts.

Contacts

To register interest and make comments or suggestions please contact Boudewijn Ambrosius or Wim Simons of DEOS of the Faculty of Aerospace Engineering, Delft University of Technology, Netherlands. For more information please go to the documents section.

Documents

This page lists all documents available on this site. Shorter subsections of this list can be accessed from the homepages of each of the SEMERGES themes.

General

Simons et al: GPS Measurements in SE Asia: Sundaland Motion and Deformation before and after the December 26th, 2004 Magnitude 9.0 Earthquake (3.2 Mb PDF file)
Vigny et al: Geophysical Implications of the December 26th, 2004 Earthquake (7.2 Mb PDF file)
Banda Aceh mega-thrust earthquake report (1.9 Mb PDF file)
SEAMERGES Description of Work, 1 Jan 2004 (??? KB PDF file)
SEAMERGES Project Definition, 1 Jan 2004 (??? KB PDF file)


Kick-off meeting

Agenda and supporting documents

Agenda for the kick-off meeting (40 KB PDF file)
(Draft) Minutes of the kick-off meeting (73 KB PDF file)

Presentations

Chula introduction presentation (505 KB PDF file)
UTM introduction presentation (1605 KB PDF file)
ITB introduction presentation (2438 KB PDF file)
RTSD introduction presentation (3785 KB PDF file)
ENS introduction presentation (6093 KB PDF file)
DEOS introduction presentation (3503 KB PDF file)

SEAMERGES Project overview: seminars & projects (437 KB PDF file)

Introducing theme 3: Satellite ALTimetry (4230 KB PDF file)
Introducing theme 2: INterferometric SAR (??? KB PDF file)
Introducing theme 1: Global Positioning System modelling aspects (19451 KB PDF file)

Theme 1: Global Positioning System

General GPS background information (??? KB PDF file)

Theme 1: GPS course information

Course agenda

Agenda of the GPS course (??? KB PDF file)

Location

Campus Map with directions (??? KB PDF file)

Lectures

GPS lecture series by Simons and Vigny (??? KB PDF file)

Training

GPS training series by Simons and Vigny (??? KB PDF file)

Theme 2: Interferometric SAR

General InSAR background information (??? KB PDF file)

Theme 2: InSAR course information

Course agenda

Agenda of the InSAR course (??? KB PDF file)

Location

Campus Map with directions (??? KB PDF file)

Lectures

InSAR lecture series by Simons and Vigny (??? KB PDF file)

Training

InSAR training series by Lasserre (??? KB PDF file)

Theme 3: Satellite Altimetry

General Altimetry background information (??? KB PDF file)

Theme 3: SALT course information

Course agenda

Agenda of the Altimetry course (??? KB PDF file)

Location

Campus Map with directions (??? KB PDF file)

Lectures

Altimetry lecture series by Naeije (??? KB PDF file)

Training

Altimetry training series by Naeije (??? KB PDF file)

Theme 4: Research projects

General description CAR project 1 (??? KB PDF file)
General description CAR project 2 (??? KB PDF file)
General Description CAR project 3 (??? KB PDF file)

Publications

First results SEAMERGES project (??? KB PDF file)

First progress meeting/review

Agenda and supporting documents

Agenda for the first progress review meeting (??? KB PDF file)
Minutes of the first progress review(??? KB PDF file)

Presentations

Progress overview (??? KB PDF file)

Reports

Progress report (??? KB PDF file)

Second progress meeting/review

Agenda and supporting documents

Agenda for the second progress review meeting (??? KB PDF file)
Minutes of the second progress review(??? KB PDF file)

Presentations

Progress overview (??? KB PDF file)

Reports

Progress report (??? KB PDF file)

Final symposium

Agenda and supporting documents

Agenda for the final symposium (??? KB PDF file)
Minutes of the final symposium(??? KB PDF file)

Presentations

Final symposium overview (??? KB PDF file)
Session 1
Session 2
Session 3
Session 4

Reports

Final report (??? KB PDF file)

Time table

SEAMERGES gatherings:

3-5 March 2004 SEAMERGES kick-off meeting
Chulalongkorn, Bangkok, Thailand

agenda and minutes
May 2004 GPS course and training, Thailand
July 2004 InSAR course and training, Malaysia
September 2004 SALT course and training, Indonesia
February 2005 First Progress meeting, Malaysia
July 2005 Second Progress meeting, Indonesia
November/December 2005 Final Symposium, Thailand
Open to all interested parties

News

14 July 2005The article "Insight into the 2004 Sumatra-Andaman earthquake from GPS measurements in southeast Asia" is published in Nature Volume 436 Number 7048 pp. 201-206. Additional information on this article can be found here! Currently the SEAMERGES project is also working on GPS results of the March 28th, 2005 Mw=8.7 aftershock, as well as post-seismic deformation in SE Asia due to both earthquakes.
5 July 2005The Royal Thai Survey Department completes another 5-day observation round of the GPS campaign points in Thailand. This is important to get an idea of the current post-seismic deformation of Thailand, and also the additional deformations caused by the March 28th, 2005 earthquake. Also now 1 more permanent GPS station is now available to the SEAMERGES project in Thailand (Bangkok since April). SEAMERGES now is shifting their GPS project focus on the post-seismic deformation of SE Asia.
23 June 2005A 10-day SEAMERGES GPS project workshop was completed at Chulalongkorn University. During this workshop, as part of the SEAMERGES GPS project, the ASEAN partners analyzed GPS data from the Mw=8.7 aftershock near the island of Nias, Indonesia. They modeled the deformation caused by this earthquake, based on permanent GPS data results available to the SEAMERGES project. The workshop was provided by Wim Simons.
10 June 2005The 5-day SEAMERGES SALT project workshop is completed at Chulalongkorn University. The SEAMERGES partners work together on studying the sea-level changes in SE Asia, and selecting a number of specific locations for further study, like the Gulf of Thailand. The SALT workshop was given by Marc Naeije.
28 March 2005A large aftershock with a magnitude 8.7 on the scale of Richter occured near the Indonesian island Nias, west of Sumatra. This aftershock occurred in a region already mentioned in the SEAMERGES report of January 7th, 2005 and discussed in the submitted Nature article and the SEAMERGES seminar in Malaysia. The SEAMERGES partners again decide to analyze GPS data from the affected region, although the displacements this time are smaller based on the first model predictions.
17 March 2005On behalf of all SEAMERGES project partners, an article on the mega-thrust earthquake using the SEAMERGES GPS network is submitted to Nature. This paper contains a comprehensive analysis of the earthquake, which was only possible by sharing GPS data by all partners under the framework of the SEAMERGES project.
22 February 2005Chulalongkorn University gives a press conference in Thailand based on the first SEAMERGES GPS results for Phuket and Bangkok from on the November and January GPS observations. The first results showed that Phuket already was shifted by 32 cm and Bangkok by 9 cm. The news is widely reported in the national and international press.
17 February 2005Following the special seminar, the first SEAMERGES progress meeting takes place in Malaysia. A large part of the meeting is spent on discussion the latest results, and the need to make a publication on behalf of all SEAMERGES partners.
16 February 2005The SEAMERGES project presents first GPS results on the Banda Aceh earthquake at a special SEAMERGES seminar in Kuala Lumpur, Malaysia. The seminar titled "Mega-thrust Earthquake Induced Tsunami Awareness" was jointly organized by UTM and the Institution of Surveyors, with honor guests from the Malaysian and EU governments. The seminar was attended by almost 300 participants, and well coveraged by the Malaysian press
Two of the presentations given by Wim Simons and Christophe Vigny can be downloaded in PDF format here. The results show that the earthquake in fact was almost 2 times larger than initially thought on basis of seismological data. Results from the SEAMERGES GPS network indicate that a much larger area of was rupture (at least 1000 km) and hence the magnitude must have been around 9.2-9.3 instead of 9.0. Deformations are detected many of thousands kilometers away from the earthquake epicenter, and the risk of following earthquake events is clearly addressed.
15 February 2005The Royal Thai Survey Department completes a repeat of the November 2004 measurements, with support of Chulalongkorn University and Delft University of Technology. Although permanent GPS data on Thailand is available from Chulalongkorn University, the GPS demo repeat provides more GPS measurements on the deformation of Thailand. At the same time it is decided to keep the GPS permanent demo site in Rayong operational until at least the end of 2005, to monitor the post-seismic motions.
25 January 2005Based on the information in the SEAMERGES report, Chulalongkorn University and the Royal Thai Survey Department decide to remeasure 2 GPS points in Thailand, of which one in Phuket. This is done to verify if Phuket Island indeed has been shifted more than 10cm. Shortly after the measurements it becomes clear that Phuket has shifted even more, which is a first indication that the earthquake has ruptured a much larger area towards the Andaman islands.
7 January 2005SEAMERGES project releases a first report on Banda Aceh mega-thrust earthquake, December 26, 2004. This report is mainly intended to give clear information on the earthquake event to all our partner, and already includes first GPS results, as well as predictions for the land displacements in SE Asia. The report also is to first to warn for future earthquake events in the region.
26 December 2004A Mw=9.0 earthquake occurs near Banda Aceh on Sumatra, followed by a devastating tsunami that takes away the lives of more than 200,000 people, and has left many more behind wounded and in shock. The SEAMERGES European partners express their sympathy to their Indonesia, Malay and Thai partners, whose countries have all been hit by this natural disaster. Because the SEAMERGES project is very well suited to give scientifical support to the affected nations, a comprehensive analysis of this dreadful event is initiated.
1 November 2004The GPS demo was completed. During this 7-day activity, the ASEAN participants were shown how to collect high-precision GPS data. With cooperation of our external partner, the Royal Thai Survey Department, 8 GPS points throughout Thailand were observed, including the GPS demo site in Rayong. These points have been observed regularly in the past, and the data was made available to SEAMERGES to be analyzed as part of the SEAMERGES GPS pilot project. The GPS demo was given by Wim Simons, in cooperation with the Chulalongkorn University and RTSD.
3 September 2004The Satellite Altimetry (SALT) course was completed at the Institut Teknologi Bandung. Again Indonesians, Malay and Thai attended this 2-week course. Theoretical background on space-born altimetry and it's applications were provided. The DEOS/NOAA Radar Altimeter Database System (RADS) was introduced, and is now available to all 3 ASEAN partners. Also the final PC was installed. This course was given by Marc Naeije.
30 July 2004The 2-week InSAR knowledge, expertise and technology transfer course was completed at the Universiti Teknologi Malaysia. Again participants from Indonesia, Malaysia and Thailand followed the course. The Synthetic Aperture Radar (SAR) interferometry is an ideal tool to study changes on the earth surface which e.g. result from earthquakes and land subsidence. The technique will be used to study the land subsidence of the capital cities Bangkok, Kuala Lumpur and Jakarta. The course was given by Cecile Lasserre, and the third PC system was installed.
28 May 2004The high-precision GPS technology courses were completed at the Chulalongkorn University. Participants from Indonesia, Malaysia and Thailand followed the 5-week course, which included both a theoretical and a hands-on training part. Besides the analysis of GPS data, the participants were also instructed how to apply geophysical models for tectonic plate motions and earthquakes. The course was given by Wim Simons and Christophe Vigny. 4 Powerful PC's were purchased and the first and second ones were installed at DUT and Chulalongkorn University.
11 March 2004Draft minutes from Kick-off meeting available.
3 March 2004Kick-off started. After the kick-off meeting, also a new (temporary) GPS demo site was installed in Rayong, Thailand, 150km SE of Bangkok.
10 February 2004Preliminary agenda for kick-off meeting in Bangkok available.
1 February 2004Welcome to the new SEAMERGES website

SEAMERGES theme 1: Global Positioning system technology

Summary

The specific needs of the ASEAN partners in the SEAMERGES project are a dedicated HRD programme in 3 areas of high-precision space geodetic technology provided by skilled and experienced EC partners, as well as an introduction to the application of the acquired technology in a number of intra-ASEAN and EC common applied research projects. This theme covers GPS technology.

Description

Using GPS technology, one of the main space geodetic techniques, tectonic deformations can be assessed by analysing temporal variations in the relative positions of GPS observing stations with millimetre accuracy. Up to now, most GPS data was analysed and processed in European countries, because most ASEAN countries do not yet have the necessary facilities, experience and infrastructure. SEAMERGES enables the ASEAN partners to independently perform future (continuous) GPS observations, analyses and interpretation, using state-of-the-art GPS techniques. It will also help them to identify high seismic risk zones in planning new domestic expansion areas and high-risk civil and industrial projects (dams, tunnels, bridges, power plants and factories). It will also allow them to establish much more precise maps, connected to well-established global reference systems and precise location of reference points for navigation purposes, and precise geocoding of GIS data, which are useful for including coastal monitoring and land-use applications.

Seminar

The high-precision GPS technology and application courses will include advanced and expert GPS data handling, data analysis and geophysical interpretation, "hands-on" training using GPS data processing and geodetic/geophysical modelling software, and the operation and maintenance of GPS data processing/collection equipment and GPS database. More details can be found in the detailed description of activities Section of the original project proposal (Grant Application Form). The seminar scedule is given in the Time Table.

Documents

General GPS background information (??? KB PDF file)

 

SEAMERGES theme 2: Interferometric SAR technology

Summary

The specific needs of the ASEAN partners in the SEAMERGES project are a dedicated HRD programme in 3 areas of high-precision space geodetic technology provided by skilled and experienced EC partners, as well as an introduction to the application of the acquired technology in a number of intra-ASEAN and EC common applied research projects. This theme covers InSAR technology.

Description

Synthetic Aperture Radar (SAR) Interferometry, despite its youth, has already been successfully applied in several research fields ranging from topographic mapping, earthquake studies and the monitoring of deformations to volcanology. This technique makes it is possible to measure terrain height with metre accuracy and is perfectly suited for generating accurate Digital Elevation Models (DEMs). SAR Interferometry also allows measuring terrain displacements with millimetre accuracy, and constitutes therefore an extraordinary tool for deformation studies and hazard assessment.
Satellite images, especially from the European remote sensing satellites ERS-1, -2 and Envisat, are relatively inexpensive when requested for scientific purposes. Moreover, a large database of SAR images is already available, spanning more than ten years and covering most of the Earth's surface. The software however needed for Interferometry processing is quite complex. A lot of scientific groups who have the necessary expertise have already developed their own software, but those who are just starting usually have to buy expensive commercial software. As a result mainly European and North American institutions can afford InSAR research. SEAMERGES wants to bridge this gap and make InSAR knowledge and tools available to the ASEAN countries. This will allow them to apply InSAR for topographic mapping and deformation studies in their own region.

Seminar

The InSAR technology and application courses will include the necessary theoretical background (introducing SAR and InSAR and their applications) and the opportunity to get acquainted with the data processing and geodetic/geophysical modelling software through "hands-on" training. More details can be found in the detailed description of activities Section of the original project proposal (Grant Application Form). The seminar scedule is given in the Time Table.

Documents

General InSAR background information (??? KB PDF file)


SEAMERGES theme 3: Satellite Radar Altimeter technology

Summary

The specific needs of the ASEAN partners in the SEAMERGES project are a dedicated HRD programme in 3 areas of high-precision space geodetic technology provided by skilled and experienced EC partners, as well as an introduction to the application of the acquired technology in a number of intra-ASEAN and EC common applied research projects. This theme covers SALT technology.

Description

Though Satellite Altimetry (SALT) may be based on the simple fact that time is distance, the processing and interpretation of the data is quite complex: you have to take into account the instrument design, calibration, validation, atmospheric path delays, geophysical corrections, reference system, precise orbit determination and space and time sampling characateristics. The result is very rewarding: the ability to observe relative and absolute sea level. Altimetric data helps monitoring sea level change and its coastal applications, regional geodetic datum realization and maintenance, research on geodynamics and mass transport and their consequence for regional and global climate, to name a few applications. DEOS has a long-standing experience in all these fields and is principal investigator in many altimeter missions. The SE-Asia region has been explored already for regional tide modelling, wave climate and internal waves, but these projects were never focussed on transferring gained knowledge to this particular region. SEAMERGES brings in expertise and data that will contribute to the development of local institutes, university research groups and companies that can support local governments and industry in coastal management and off-shore activities. By initiating research cooperation, organising workshops and hands-on training with altimeter database tools, and the integration of the altimetry with GPS, InSAR and in-situ measurements like ocean tides, intra regional cooperative research can be stimulated and developed to an international standard and help in the advancement of altimetry based science, operations and commerce.

Seminar

The SALT technology and application courses will include the necessary theoretical background (introducing the space borne altimeter and its wide range of applications), the introduction to RADS (the DEOS/NOAA Radar Altimeter Database System) and altimeter processing, and the opportunity to get acquainted with the RADS database and tools by "hands-on" training. More details can be found in the detailed description of activities Section of the original project proposal (Grant Application Form). The seminar scedule is given in the Time Table.

Documents

General Altimetry background information (??? KB PDF file)



Expected output of projects during/after SEAMERGES: Jan. 2003- Jan. 2006

Identify regions that can pose significant natural hazards fort he population
Common applied research by (between the) EU and ASEAN
Raise awarness of the importance of scientific co-operation and establish sustainable co-operation between partners
Provide reports for general public
Monitoring of land subsidience and study of regional crustal deformations and tectonic block motions, including envoronmental risk to densely populated areas using GPS/SAR/SALT
Detection of preseismic motions
Kinematic measurement of position during the earthquake
Final Report, before Jan. 2006

Seismic cycle in subduction context
Seismic moment 10 ** 20 Nm (na skali od 0 – 8)
Seismological research letters
Detection of preseismic motion
Coulomb Stress on fault
stress on fault plane is increased =>slip on fault
Final symposium 29. Nov. – 1. Dec. 2005

http://www.deos.tudelft.nl/seamerges/