An approach to jointly invert hypocenters and 1D velocity structure and its application to the Lushan earthquake series

Qian, Hui; Mechie, James; Li, Haibing; Xue, Guangqi; Su, Heping; Cui, Xiang
January 2016
Journal of Seismology;Jan2016, Vol. 20 Issue 1, p213
Academic Journal
Earthquake location is essential when defining fault systems and other geological structures. Many methods have been developed to locate hypocenters within a 1D velocity model. In this study, a new approach, named MatLoc, has been developed which can simultaneously invert for the locations and origin times of the hypocenters and the velocity structure, from the arrival times of local earthquakes. Moreover, it can invert for layer boundary depths, such as Moho depths, which can be well constrained by the Pm and Pn phases. For this purpose, the package was developed to take into account reflected phases, e.g., the Pm phase. The speed of the inversion is acceptable due to the use of optimized matrix calculations. The package has been used to re-locate the Lushan earthquake series which occurred in Sichuan, China, from April 20 to April 22, 2013. The results obtained with the package show that the Lushan earthquake series defines the dip of the Guankou fault, on which most of the series occurred, to be 39° toward the NW. Further, the surface projection of the Lushan earthquake series is consistent with the regional tectonic strike which is about N45° E.


Related Articles

  • Role of transverse tectonics in the Himalayan collision: Further evidences from two contemporary earthquakes. Dasgupta, Sujit; Mukhopadhyay, Basab; Mukhopadhyay, Manoj; Nandy, D. // Journal of the Geological Society of India;Feb2013, Vol. 81 Issue 2, p241 

    Two contemporary earthquakes originating in the central Himalayan arc and its foredeep (Sikkim earthquake of 18.09.2011, M 6.9, h: 10-60 (?) km and Bihar-Nepal earthquake of 20.08.1988, Mw 6.8, h: 57 km) are commonly associated with transverse lineaments/faults traversing the region. Such...

  • Study of Earthquake Potential Between Two Major Faults In Buol Area Sulawesi. Nahli, Kiddy; Oiyzavica, Vicco // AIP Conference Proceedings;2017, Vol. 1857 Issue 1, p1 

    The geological structures of Sulawesi have a very complex condition. Its regional tectonic have a several phases as a result of three plates movements include Pacific. Australia, and Eurasia plates. A complex and active geological conditions in Sulawesi cause frequent earthquakes. The research...

  • Detailed Seismotectonic Analysis of Sumatra Subduction Zone revealed by High Precision Earthquake Location. Sagala, Ricardo Alfencius; Prih Harjadi, P. J.; Heryandoko, Nova; Sianipar, Dimas // AIP Conference Proceedings;2017, Vol. 1857 Issue 1, p1 

    Sumatra was one of the most high seismicity regions in Indonesia. The subduction of Indo-Australian plate beneath Eurasian plate in western Sumatra contributes for many significant earthquakes that occur in this area. These earthquake events can be used to analyze the seismotectonic of Sumatra...

  • Seismotectonics of the Chersky Seismic Belt, eastern Sakha Republic (Yakutia) and Magadan District, Russia. Fujita, K.; Koz'min, B. M.; Mackey, K. G.; Riegel, S. A.; McLean, M. S.; Imaev, V. S. // Stephan Mueller Special Publication Series;2009, Vol. 4, p117 

    The article reports on the study that analyzes the seismotectonics of the chersky seismic belt (CSB) in Russia. It indicates that CSB represents a zone of deformation between the North American and Eurasian plates in northeast Russia, and it extends from the Laptev Sea into the Chersky Range. It...

  • Ganges basin geometry records a pre-1 5 Ma isostatic rebound of Himalaya. Mugnier, Jean-Louis; Huyghe, Pascale // Geology;Jun2006, Vol. 34 Issue 6, p445 

    The Tertiary continental strata of the Himalayan foreland basin are subdivided into two groups, but the meaning of this subdivision was previously unclear. From the analysis of drill holes, seismic lines, dated sections, outcrops, and balanced cross sections, we find that the southward migration...

  • Seismic of the territory Toktogul reservoir, Kyrgyzstan. Kamchybekov, Murataly; Yegemberdiyeva, Kuliya // AIP Conference Proceedings;7/8/2008, Vol. 1020 Issue 1, p1624 

    In connection with that this seismic in the territory of Naryn cascade maybe has its peculiarity in cludding in the territory Toktogul reservoir before of the building of the Toktogul dam, during of the building and after accordingly was decided to consider the seismic in this space of times....

  • Determination of neotectonic features of the Karasu Basin (SE Turkey) and their relationship with Quaternary volcanic activity using Landsat ETM+ imagery. Sevki Kavak, Kaan; Tatar, Orhan; Piper, John; Kocbulut, Fikret; Levent Mesci, B. // International Journal of Remote Sensing;Sep2009, Vol. 30 Issue 17, p4507 

    The junction between the East Anatolian and the Dead Sea fault zones lies close to an unstable F: Transform fault (FFF) triple junction where the African, Eurasian and Arabian plates meet in south-eastern Turkey. The Karasu Basin is an ephemeral rifted structure located close to the junction of...

  • The January 25th, 2014 Kebumen Earthquake: A Normal Faulting in Subduction Zone of Southern Java. Serhalawan, Yopi Ruben; Sianipar, Dimas; Suardi, Iman // AIP Conference Proceedings;2017, Vol. 1857 Issue 1, p1 

    Normal faulting mechanism of earthquake in subduction zone is quite interested to study further. We investigated the Kebumen, January 25, 2014 earthquake sequences by retrieving focal mechanisms using full moment tensor inversion. We used BMKG seismic data from stations in the vicinity of...

  • Shaping mobile belts by small-scale convection. Faccenna, Claudio; Becker, Thorsten W. // Nature;6/3/2010, Vol. 465 Issue 7298, p602 

    Mobile belts are long-lived deformation zones composed of an ensemble of crustal fragments, distributed over hundreds of kilometres inside continental convergent margins. The Mediterranean represents a remarkable example of this tectonic setting: the region hosts a diffuse boundary between the...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics