The Lushan MS7.0 earthquake and activity of the southern segment of the Longmenshan fault zoneReport as inadecuate




The Lushan MS7.0 earthquake and activity of the southern segment of the Longmenshan fault zone - Download this document for free, or read online. Document in PDF available to download.

Chinese Science Bulletin

, Volume 58, Issue 28–29, pp 3475–3482

First Online: 14 August 2013Received: 15 May 2013Accepted: 02 July 2013DOI: 10.1007-s11434-013-6009-6

Cite this article as: Chen, L., Ran, Y., Wang, H. et al. Chin. Sci. Bull. 2013 58: 3475. doi:10.1007-s11434-013-6009-6

Abstract

Following the Lushan MS7.0 earthquake on 20 April 2013, a topic of much concern is whether events of MS7 or greater could occur again on the southern segment of the Longmenshan fault zone. In providing evidence to answer this question, this work analyzes the tectonic relationship between the Lushan event and the 2008 Wenchuan earthquake and the rupture history of the southern segment of the Longmenshan fault zone, through field investigations of active tectonics and paleoearthquake research, and our preliminary conclusions are as follows. The activity of the southern segment of the Longmenshan fault zone is much different to that of its central section, and the late Quaternary activity has propagated forward to the basin in the east. The seismogenic structure of the 2008 Wenchuan earthquake is the central-fore-range fault system, whereas that of the 2013 Lushan event is attributed to the fore-range-range-front fault system, rather than the central fault. The southern segment of the Longmenshan fault zone becomes wider towards the south with an increasing number of secondary faults, of which the individual faults exhibit much weaker surface activity. Therefore, this section is not as capable of generating a major earthquake as is the central segment. It is most likely that the 2013 earthquake fills the seismic gap around Lushan on the southern segment of the Longmenshan fault zone.

KeywordsLushan earthquake Wenchuan earthquake Longmenshan fault zone active tectonics paleoearthquake This article is published with open access at Springerlink.com

Download to read the full article text



Author: LiChun Chen - YongKang Ran - Hu Wang - YanBao Li - XinQuan Ma

Source: https://link.springer.com/







Related documents