3 years ago

The surface rupture zone and paleoseismic evidence on the seismogenic fault of the 1976 Ms 7.8 Tangshan earthquake, China

Hui Guo, Junxiang Zhao

Publication date: Available online 13 November 2018

Source: Geomorphology

Author(s): Hui Guo, Junxiang Zhao


The Ms 7.8 Tangshan earthquake of 1976 was the largest earthquake that occurred in the northern North China Plain over the last 300 years. Most of the earthquake scarps had been disturbed or had disappeared, except for some seismic ruins and relics that were protected or had remained. Aerial photos taken after the earthquake also indicate the locations of some of these scarps. In this study, we reinvestigated the surface rupture zone of this earthquake and conducted composite borehole profiling and trenching across the new-found surface rupture to obtain the paleo-earthquake events of the seismogenic fault. The following major conclusions regarding the Ms 7.8 Tangshan earthquake have been reached. 1) The length of the rupture zone of the Tangshan earthquake was >47 km. In addition, to the east and west sides of the main surface rupture, there was a prominent secondary fissure zone. 2) The Tangshan Fault experienced nine paleoearthquake events since 115 ka. The timing of the four faulting events prior to the 1976 earthquake was 7.76–8.13 ka, around 16.2 ka, around 24.3 ka, and >32.41 ka. Considering the earthquake of 1976, the recurrence interval of the five strong earthquake events is about 8.1 ka. 3) The magnitudes of these paleoearthquakes E2 to E5, which happened before the Tangshan earthquake, were about Ms 7.6–7.7, Ms 7.5–7.9, Ms 7.7–7.8, and Ms 7.5, respectively. Research on the 1976 Tangshan earthquake is important for improving earthquake predictions in the North China Plain.

Graphical Abstract

Unlabelled Image

You might also like
Discover & Discuss Important Research

Keeping up-to-date with research can feel impossible, with papers being published faster than you'll ever be able to read them. That's where Researcher comes in: we're simplifying discovery and making important discussions happen. With over 19,000 sources, including peer-reviewed journals, preprints, blogs, universities, podcasts and Live events across 10 research areas, you'll never miss what's important to you. It's like social media, but better. Oh, and we should mention - it's free.

  • Download from Google Play
  • Download from App Store
  • Download from AppInChina

Researcher displays publicly available abstracts and doesn’t host any full article content. If the content is open access, we will direct clicks from the abstracts to the publisher website and display the PDF copy on our platform. Clicks to view the full text will be directed to the publisher website, where only users with subscriptions or access through their institution are able to view the full article.