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| 1 | Lushan M_S7.0 earthquake:A blind reserve-fault event显示文摘In the epicenter of the Lushan MS7.0 earthquake there are several imbricate active reverse faults lying from northwest to southeast,namely the Gengda-Longdong,Yanjing-Wulong,Shuangshi-Dachuan and Dayi faults.Emergency field investigations have indicated that no apparent earthquake surface rupture zones were located along these active faults or their adjacent areas.Only brittle compressive ruptures in the cement-covered pavements can be seen in Shuangshi,Taiping,Longxing and Longmen Townships,and these ruptures show that a local crustal shortening occurred in the region during the earthquake.Combining spatial distribution of the relocated aftershocks and focal mechanism solutions,it is inferred that the Lushan earthquake is classified as a typical blind reverse-fault earthquake,and it is advised that the relevant departments should pay great attention to other historically un-ruptured segments along the Longmenshan thrust belt and throughout its adjacent areas. | XU XiWei WEN XueZe HAN ZhuJun CHEN GuiHua LI ChuanYou ZHENG WenJun ZHNAG ShiMin REN ZhiQun XU Chong TAN XiBin WEI ZhanYu WANG MingMing REN JunJie HE ZhongTai LIANG MingJian | 2013 | Chinese Science Bulletin2013，58，28： | 35 |
| 2 | New Progress in Paleoearthquake Studies of the East Sertengshan Piedmont Fault, Inner Mongolia, China显示文摘The two eastern segments of the Sertengshan piedmont fault have moved considerably since the Holocene. Several paleoseismic events have occurred along the fault since 30 ka BP. Paleoearthquake studies have been advanced by digging new trenches and combining the results with the findings of previous studies. Comprehensive analyses of the trenches revealed that 6 paleoseismic events have occurred on the Kuoluebulong segment since approximately 30 ka BP within the following successive time periods: 19.01–37.56, 18.73, 15.03–15.86, 10.96, 5.77–6.48, and 2.32 ka BP. The analyses also revealed that 6 paleoseismic events have occurred on the Dashetai segment since approximately 30 ka BP, and the successive occurrence times are 29.07, 19.12–28.23, 13.92–15.22, 9.38–9.83, 6.08–8.36, and 3.59 ka BP. The results indicate that quasi-periodic recurrences occurred along the two segments with an approximate 4 000 a mean recurrence interval. The consistent timing of the 6 events between the two segments indicates that the segments might conform to the cascade rupturing model between the two segments. As recorded by a large number of Chinese historical texts, the latest event on the Kuoluebulong segment is the historical M 8.0 earthquake occurred on November 11, 7 BC. | Zhongtai He Baoqi Ma Jianyu Long Jinyan Wang Hao Zhang | 2018 | Journal of Earth Science2018，29，2： | 2 |
| 3 | Study on Paleo- earthquakes in Daqingshan Piedmont Fault, Inner Mongolia of China by Using Holocene Paleosols on the Paleo-aUuvial-pluvial Fans 显示文摘 | He Zhongtai Ma Baoqi Hou Jianjun | 2012 | Zeitschrift ftir Geomorphologie2012，56，3： | 1 |
| 4 | Responses of Stream Geomorphic Indices to Piedmont Fault Activity in the Daqingshan Area of China显示文摘A recent correlation of stream geomorphic indices to fault activity has revealed that stream geomorphologies in bedrock mountain areas are good records of local fault movements. The Daqingshan piedmont fault is one of the main active faults in the fault system on the northern margin of the Hetao Basin and has produced frequent large-scale earthquakes since the Late Pleistocene. In the present study, following the segmentation regime of previous studies, we divide the fault zone into five segments, namely, the Baotou, Tuyouqi West, Tuzuoqi West, Bikeqi, and Hohhot segments, and we discuss the relationship between the drainage basin geomorphology and the piedmont fault activity in the Daqingshan area using 30 m spatial resolution Shuttle Radar Topography Mission(SRTM) digital elevation model(DEM) data. We use a range of geomorphic indices to examine the drainage basins in the Daqingshan area, including the channel steepness index(ksn), slope, hypsometric integral(HI), relief degree of land surface(RDLS), and stream lengthgradient index(SL), extracted with ArcGIS and MATLAB, and we also consider local lithologic and climate aspects. Furthermore, we compare the geomorphic indices with the slip rates of individual segments of the Daqingshan piedmont fault and paleoseismic data. The results show that the geomorphic indices of drainage basins in the Daqingshan area are primarily affected by the piedmont fault activity in the Daqingshan area. The geomorphic indices also demonstrate that piedmont fault activity has been the most intense in the middle segment of this fault system since the Late Quaternary and decreases towards the two sides. | Junyi Wang Zhongtai He | 2020 | Journal of Earth Science2020，31，5： | 0 |
| 5 | The 2014 Northern Thailand Mw 6.1 Earthquake and its Seismogenic Tectonics显示文摘On May 5, 2014, an earthquake with a magnitude of Mw 6.1(the largest earthquake in Thailand so far) occurred in Chiang Rai of the Golden Triangle area in northern Thailand. We had an opportunity to conduct field survey immediately after the earthquake. Serious damage to buildings and casualties of lives were observed, and the estimated Maximum Mercalli Intensity(MMI) of the earthquake is Ⅷ(evaluated according to the MMI scale of the Chinese Standard). No long continuous ground ruptures were produced during the earthquake, but in the epicenter(commonly within MMI Ⅷ extent), massive small linear ruptures(usually several tens of meters long) developed and displayed intriguing structural features, offsetting many roads several centimeters left laterally on NE trending cracks or offsetting right laterally on NW trending ones. The focal mechanism solution of earthquake shows that this is a pure strike-slip event, and two nodal planes in NW and NE directions had the same motion senses respectively as those of breakage associated with the earthquake. The long axis of the isoseismals and aftershock distributions are in NE direction,which is consistent with the strike of Luang Namtha fault. The 230-km-long Luang Namtha fault which starts from the border of China and Laos, runs through northern Laos, and terminates at Chiang Rai of Thailand is predominated by left-lateral strike-slip and active in late Quaternary, and two earthquakes over Ms 6.0 occurred along the fault in 1925 and 2007 respectively. This Mw 6.1 earthquake occurred at the southwestern end of the fault. All related features such as evident structural rupturing, elongated orientation of MMI and aftershock distribution,as well as the location of the epicenter,suggest that the Luang Namtha fault may be responsible for the 2014 Northern Thailand earthquake. | CHANG Zufeng DONG Pin-liang YUAN Renmao HOU Jianjun HE Zhongtai LI Jianlin CHANG Hao | 2022 | Acta Geologica Sinica(English Edition)2022，96，2： | 0 |
| 6 | Lacustrine sedimentary responses to earthquakes—soft-sediment deformation structures since late Pleistocene:A review of current understanding显示文摘The traces left by earthquakes in lacustrine sediments are studied to determine the occurrence of ancient earthquakes by identifying seismically induced soft-sediment deformation structures(SSDS).Dating can help reconstruct the relative frequency of earthquakes.Identifying seismically induced seismites,which carry abundant seismic information from numerous SSDS,is both critical and challenging.Studying the deformation mechanism of SSDS and learning about the common criteria of seismically induced SSDS improve the identification of earthquake triggers.With better research into SSDS,seismic events can be effectively captured,and temporal constraints can be carried out by 14C dating and optically stimulated luminescence(OSL)dating to identify and date the occurrence of ancient earthquakes.The present contribution primarily addresses the meaning and mechanism of SSDS and their relationship with earthquake magnitude as well as the common criteria of the SSDS induced by earthquakes. | Long Guo Zhongtai He Linlin Li | 2023 | Earthquake Research Advances2023，3，2： | 0 |
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