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Title: Upper crustal structure beneath East Java from ambient noise tomography: A preliminary result

East Java has a fairly complex geological structure. Physiographically East Java can be divided into three zones, i.e. the Southern Mountains zone in the southern part, the Kendeng zone in the middle part, and the Rembang zone in the northern part. Most of the seismic hazards in this region are due to processes in the upper crust. In this study, the Ambient Noise Tomography (ANT) method is used to image the upper crustal structure beneath East Java. We have used seismic waveform data recorded by 8Meteorological, Climatological and Geophysical Agency (BMKG) stationary seismographic stations and 16 portable seismographs installed for 2 to 8 weeks. The data were processed to obtain waveforms fromnoise cross-correlation between pairs of seismographic stations. Our preliminary results indicate that the Kendeng zone, an area of low gravity anomaly, is associated with a low velocity zone. On the other hand, the southern mountain range, which has a high gravity anomaly, is related to a high velocity anomaly as shown by our tomographic images.
Authors:
 [1] ;  [2] ;  [3] ;  [2] ; ;  [4] ;  [1]
  1. Meteorological, Climatological and Geophysical Agency, Jakarta (Indonesia)
  2. (Indonesia)
  3. Global Geophysics Group, Institut Teknologi Bandung, Bandung (Indonesia)
  4. Research School of Earth Sciences, Australian National University, Canberra (Australia)
Publication Date:
OSTI Identifier:
22391570
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1658; Journal Issue: 1; Conference: ISEDM 2014: 4. International Sympsoium on Earthquake and Disaster Mitigation 2014, Bandung (Indonesia), 11-12 Nov 2014; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; CORRELATIONS; GEOPHYSICS; GRAVITATION; HAZARDS; IMAGES; JAVA; MOUNTAINS; NOISE; SEISMIC DETECTION; SEISMICITY; SEISMOGRAPHS; SEISMOLOGY; TOMOGRAPHY; VELOCITY; WAVE FORMS; ZONES