Journal of Tropical Oceanography ›› 2017, Vol. 36 ›› Issue (2): 60-69.doi: 10.11978/2016058CSTR: 32234.14.2016058

Special Issue: 海洋大数据及应用

• Orginal Article • Previous Articles     Next Articles

OBS seismic data processing of the Manila Trench subduction zone (21°N) and some preliminary results

Siqing LIU1,3(), Minghui ZHAO1(), Jiazheng ZHANG1, Longtao SUN1, Ya XU2, Wenhuan ZHAN1, Xuelin QIU1   

  1. 1. Key Laboratory of Marginal Sea Geology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China
    2. Key Laboratory of Petroleum Resources Research, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China
    3. University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2016-06-16 Revised:2016-08-30 Online:2017-03-20 Published:2017-04-06
  • Supported by:
    Natural Science Foundation of China (91428204, 41376063, 41449908, 41576070);Natural Science Foundation of China Open Research Cruise (NORC2015-08);Strategic Priority Research Program of the Chinese Academy of Science (XDB06030202 )

Abstract:

A two-dimensional ocean bottom seismometer (OBS) survey line (OBS2015-2) was carried out in 2015, which was an E-W trending and located in the front of the Manila Trench subduction zone. In this study, we take two OBS stations (OBS04 and OBS08) as examples to introduce the data processing flow for this short-period OBS type of data. The process includes data format transforming from original RAW data to SAC format and then to SEGY format; and it contains shot relocation and OBS position relocation. The preliminary results of data processing demonstrate that the OBS data are of high quality in this experiment. The seismic phases, such as PsP, Pg, PmP, etc. are very clear along the OBSs’ seismic record sections. They are further identified by the forward modeling using the Rayinvr software. Especially, the reflective seismic phases from the Moho interface are abundant and obvious in the incoming plate along the Manila Trench subduction zone, which will provide good constraints for the crustal bottom of the incoming plate.

Key words: ocean bottom seismometer (OBS), seismic phase picking, the Manila Trench subduction zone, data processing

CLC Number: 

  • P738