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Estimation of Slip Distribution of the 2007 Bengkulu Earthquake from GPS Observations Using the LeastSquares Inversion Method

Journal of Engineering and Technological Sciences · Vol. 44 No. 2 (2013) · hlm. 187–206

DOI
10.5614/itbj.eng.sci.2012.44.2.6
ISSN
2338-5502, 2337-5779
Terbit
2013-09-13
Penerbit
Directorate for Research and Community Services, Institut Teknologi Bandung
Bahasa
eng

Abstrak

Continuous Global Positioning System (GPS) observations showed significant crustal displacements as a result of the Bengkulu earthquake occurring on September 12, 2007. A maximum horizontal displacement of 2.11 m was observed at PRKB station, while the vertical component at BSAT station was lifted up with a maximum of 0.73 m, and the vertical component at LAIS station had subsided "“0.97 m. Adding more constraints on the inversion for the Bengkulu earthquake slip distribution inferred from GPS observations can help solve the underdetermined least-squares inversion. Checkerboard tests were performed to help conduct the weighting for constraining the inversion. The inversion calculation yielded an optimal value for the slip distribution by giving the smoothing constraint a weight of 0.001 and the slip constraint a weight of = 0 at the edge of the earthquake rupture area. The maximum co-seismic slip of the optimal inversion calculation was 5.12 m at the lower area of PRKB station and BSAT station. The seismic moment calculated from the optimal slip distribution was 7.14 x 1021 Nm, which is equivalent to a magnitude of 8.5.

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  • Bandung Institute of Technology
  • Universitas Gadjah Mada
  • Diponegoro University
  • IPB University
  • Universitas Airlangga
  • Universitas Bhayangkara Jakarta Raya
  • Pusat Vulkanologi dan Mitigasi Bencana Geologi
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Rekan penulisOrganisasiArtikel bersama
Wahyu SrigutomoBandung Institute of Technology3
Andri Dian NugrahaBandung Institute of Technology3
Ratih KumalasariUniversitas Bhayangkara Jakarta Raya2
Mohamad RidwanBandung Institute of Technology2
Hendra Edi GunawanBandung Institute of Technology1
Hendra GunawanPusat Vulkanologi dan Mitigasi Bencana Geologi1
Mitra DjamalBandung Institute of Technology1
Nina Siti AminahBandung Institute of Technology1
Mitra DjamalBandung Institute of Technology1
Wahyudi WahyudiUniversitas Gadjah Mada1
Irzaman IrzamanIPB University1
Perdinan PerdinanIPB University1
Retna ApsariUniversitas Airlangga1
Wiwit SuryantoUniversitas Gadjah Mada1
Imam SuyantoUniversitas Gadjah Mada1
Ari SetiawanUniversitas Gadjah Mada1
Heriansyah PutraIPB University1
Herlan DarmawanUniversitas Gadjah Mada1
Maria EvitaBandung Institute of Technology1
Moh YasinUniversitas Airlangga1
Arwan Putra WijayaDiponegoro University1
Bambang Darmo YuwonoDiponegoro University1
LM SabriDiponegoro University1
Ony K. SugandarAfiliasi tidak diketahui1
M. A. KusumaAfiliasi tidak diketahui1
D. DarmawanAfiliasi tidak diketahui1
M. A. PurbawinataAfiliasi tidak diketahui1
A. D. WirakusumahAfiliasi tidak diketahui1
F. KimataAfiliasi tidak diketahui1
Heri AndreasBandung Institute of Technology1
Hasanuddin Zainal AbidinBandung Institute of Technology1
M. GamalBandung Institute of Technology1
M. HendrastoBandung Institute of Technology1
Rexha Verdhora RyBandung Institute of Technology1
T. SeptyanaAfiliasi tidak diketahui1
Arii ArdjunaAfiliasi tidak diketahui1
Afnimar AfnimarBandung Institute of Technology1

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Sumber metadata: OAI-PMH (metadata jurnal) https://journals.itb.ac.id/index.php/jets/oai, pertama di-harvest 9 Nov 2026, terakhir terlihat 9 Nov 2026.
Metadata asli (oai_dc) 
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	<dc:title xml:lang="en-US">Estimation of Slip Distribution of the 2007 Bengkulu Earthquake from GPS Observations Using the LeastSquares Inversion Method</dc:title>
	<dc:creator>Awaluddin, Moehammad</dc:creator>
	<dc:creator>Meilano, Irwan</dc:creator>
	<dc:creator>Widiyantoro, Sri</dc:creator>
	<dc:description xml:lang="en-US">Continuous  Global  Positioning  System  (GPS)  observations  showed significant  crustal  displacements  as  a  result  of  the  Bengkulu  earthquake occurring on September 12, 2007. A maximum horizontal displacement of 2.11 m was observed at PRKB station, while the vertical component at BSAT station was lifted up with a maximum of 0.73 m, and the vertical component at LAIS station had subsided  "“0.97 m. Adding more constraints on the inversion for the Bengkulu earthquake slip distribution inferred from GPS observations can help solve  the  underdetermined  least-squares  inversion.  Checkerboard  tests  were performed  to  help  conduct  the  weighting  for  constraining  the  inversion.  The inversion calculation yielded an optimal value for the slip distribution by giving the smoothing constraint a weight of 0.001 and the slip constraint a weight of = 0 at the edge of the earthquake rupture area. The maximum co-seismic slip of the optimal inversion calculation was 5.12 m at the lower area of PRKB station and BSAT station. The seismic moment calculated from the optimal slip distribution was 7.14 x 1021 Nm, which is equivalent to a magnitude of 8.5.</dc:description>
	<dc:publisher xml:lang="en-US">Directorate for Research and Community Services, Institut Teknologi Bandung</dc:publisher>
	<dc:date>2013-09-13</dc:date>
	<dc:type>info:eu-repo/semantics/article</dc:type>
	<dc:type>info:eu-repo/semantics/publishedVersion</dc:type>
	<dc:format>application/pdf</dc:format>
	<dc:identifier>https://journals.itb.ac.id/index.php/jets/article/view/193</dc:identifier>
	<dc:identifier>10.5614/itbj.eng.sci.2012.44.2.6</dc:identifier>
	<dc:source xml:lang="en-US">Journal of Engineering and Technological Sciences; Vol. 44 No. 2 (2012); 187-206</dc:source>
	<dc:source>2338-5502</dc:source>
	<dc:source>2337-5779</dc:source>
	<dc:language>eng</dc:language>
	<dc:relation>https://journals.itb.ac.id/index.php/jets/article/view/193/187</dc:relation>
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