TY - JOUR
T1 - Earthquake source parameters at the Sumatran Fault Zone
T2 - Identification of the activated fault plane
AU - Kasmolan, Madlazim
AU - Santosa, Bagus
AU - Lees, Jonathan
AU - Utama, Widya
N1 - Funding Information:
We would like to express our gratitude to those who helped us to finish this research. We want to thank IRIS-DMC, GFZ-Potsdam GEOFON (Germany), and BMKG (Indonesia), all of which permitted us to download wave-form data recorded by IA network stations. Furthermore, we would like to thank Prof. Dr. Jiri Zahradnik and Dr. Efthimios Sokos, who gave us guidance in understanding the ISOLA-GUI and HC-plot software, and in applying this software to estimate earthquake source parameters using three-component local waveforms (http: //seismo.geology.upatras.gr/isola). The authors would like to thank Dr. Fredy Alferdo who provided example data input and a manual for the HYPOINVERSE software. This research is part of author’s PhD project, and is supported by a BPPS, provided by the Human Resources Directorate General of the Higher Education Ministry of National Education (DIKTI), Indonesia.
PY - 2010/12/1
Y1 - 2010/12/1
N2 - Fifteen earthquakes (Mw 4.1-6.4) occurring at ten major segments of the Sumatran Fault Zone (SFZ) were analyzed to identify their respective fault planes. The events were relocated in order to assess hypocenter uncertainty. Earthquake source parameters were determined from three-component local waveforms recorded by IRIS-DMC and GEOFON broadband IA networks. Epicentral distances of all stations were less than 10°. Moment tensor solutions of the events were calculated, along with simultaneous determination of centroid position. Joint analysis of hypocenter position, centroid position, and nodal planes produced clear outlines of the Sumatran fault planes. The preferable seismotectonic interpretation is that the events activated the SFZ at a depth of approximately 14-210 km, corresponding to the interplate Sumatran fault boundary. The identification of this seismic fault zone is significant to the investigation of seismic hazards in the region.
AB - Fifteen earthquakes (Mw 4.1-6.4) occurring at ten major segments of the Sumatran Fault Zone (SFZ) were analyzed to identify their respective fault planes. The events were relocated in order to assess hypocenter uncertainty. Earthquake source parameters were determined from three-component local waveforms recorded by IRIS-DMC and GEOFON broadband IA networks. Epicentral distances of all stations were less than 10°. Moment tensor solutions of the events were calculated, along with simultaneous determination of centroid position. Joint analysis of hypocenter position, centroid position, and nodal planes produced clear outlines of the Sumatran fault planes. The preferable seismotectonic interpretation is that the events activated the SFZ at a depth of approximately 14-210 km, corresponding to the interplate Sumatran fault boundary. The identification of this seismic fault zone is significant to the investigation of seismic hazards in the region.
KW - Sumatran Fault Zone
KW - earthquake source parameters
KW - fault plane
KW - three-component local waveform inversion
UR - http://www.scopus.com/inward/record.url?scp=78649527596&partnerID=8YFLogxK
U2 - 10.2478/v10085-010-0016-5
DO - 10.2478/v10085-010-0016-5
M3 - Article
AN - SCOPUS:78649527596
SN - 1896-1517
VL - 2
SP - 455
EP - 474
JO - Central European Journal of Geosciences
JF - Central European Journal of Geosciences
IS - 4
ER -