About Lanzhou Institute of Seismology, China Earthquake Administration

Lanzhou Institute of Seismology, China Earthquake Administration

The Lanzhou Institute of Seismology is a research institute of the China Earthquake Administration based in Lanzhou, the capital of Gansu province in northwest China. It is the CEA's comprehensive earthquake research centre for the northwest, working on seismology, active-fault studies and earthquake hazard assessment in one of the most earthquake-exposed regions on Earth. Lanzhou sits at the geographic centre of China, on the northeastern margin of the Qinghai–Xizang (Tibetan) Plateau and on the northern segment of China's North–South seismic belt, the great zone of active faulting that runs down the country's centre. The province around it experienced the catastrophic 1920 Haiyuan earthquake and the 1927 Gulang earthquake, and the institute's science — from its historical field investigations of loess landslides to its long-running research exchange with the Kentucky Geological Survey — is shaped by that landscape of loess, faults and seismic risk.

Setting and institutional character

An older institutional survey describes the institute at 410 Donggang West Road, Lanzhou 730000, as one of the earliest earthquake research institutions in China, directly under what was then the China Seismological Bureau, with 409 scientists and technicians at the time of that description, among them 105 senior specialists. Although those staffing figures are dated, the characterisation remains apt: the institute is a comprehensive research centre for earthquake science in northwestern China rather than a single-discipline laboratory. Its location is scientifically deliberate. The Tibetan Plateau's northeastern margin is where the plateau's eastward push meets the loess country of Gansu, producing dense active faulting and a recorded history of very large earthquakes. An institute placed in Lanzhou can study active faults in the field, maintain regional monitoring and assessment capability, and advise the provincial authorities — it has also been associated with the Gansu Earthquake Administration — on the hazards its research identifies.

The earthquakes that define its region

The institute's region has suffered some of history's deadliest earthquakes. In 1920 an earthquake of about magnitude 8.5 in Gansu — the Haiyuan earthquake — took a reported 230,000 lives. In 1927 the Gulang earthquake, magnitude 8.0, struck Gulang County: a modern study using remote-sensing interpretation identified 807 landslides triggered by that event, covering 256 square kilometres, and it notes that the Lanzhou Institute of Seismology conducted several systematic field investigations in the last century and made detailed records of them, records on which present-day landslide research still draws. The 2008 Wenchuan earthquake, magnitude 7.9 to 8.0, which killed more than 70,000 people in neighbouring Sichuan and southeast Gansu, further renewed the institute's mission: its researchers worked with Wenchuan data on ground motion, and its international partners travelled to Gansu to support reconstruction. Historical investigation is thus a living function of the institute — its archive of field records from past earthquakes remains scientific capital for hazard research today.

Loess and earthquake landslides

A signature Lanzhou research theme is loess: the thick, wind-blown silt that blankets much of Gansu, including developed parts of Lanzhou itself. Loess behaves treacherously in earthquakes — it can amplify shaking, fail on slopes and produce enormous landslides, as the landslide fields of the 1927 Gulang earthquake demonstrate. Institute research and the studies built on its records examine the distribution, physical properties and microstructure of loess seismic landslides and their relation to fault belts. This specialism gives the institute an unusual international resonance: the liquefaction-prone sediments of the New Madrid Seismic Zone in the central United States behave in ways comparable to Gansu loess, which is one reason the Kentucky Geological Survey found the Lanzhou partnership so valuable. Understanding how soft ground responds to shaking — whether silt in Gansu or river deposits in Kentucky — is central to predicting where earthquake damage will be worst.

Active faults and hazard assessment

The institute works on seismology, active-fault studies and earthquake hazard assessment for northwest China. Its field scientists identify and characterise active faults — in Gansu, unlike in Kentucky, the faults are commonly exposed at the surface, a difference that visiting American researchers noted as a scientific opportunity to learn how the faults produce earthquakes. Hazard assessment projects have included work for the city of Tianshui in southeastern Gansu, where Kentucky and Lanzhou scientists jointly pursued seismic hazard mapping and assessment, presenting technical lectures and conducting field work together. The institute's researchers also develop methods used after earthquakes strike: a 2023 study by Lanzhou authors in Natural Hazards and Earth System Sciences proposed an improved method for rapid estimation of seismic intensity from aftershock sequences within two hours of a mainshock, using robust locally weighted regression, tested on 27 large earthquakes worldwide — work aimed at helping emergency responders judge the rupture and the affected area while information is still scarce.

The Kentucky exchange: origins, 2004–2005

The institute's best-documented international relationship is its earthquake research exchange with the Kentucky Geological Survey (KGS) at the University of Kentucky. An agreement reached late in 2004 produced the first exchanges in 2005: in May that year three Lanzhou researchers — Institute Director Lanmin Wang, engineering seismology professor Yucheng Shi and geology professor Daoyang Yuan — visited Kentucky, sharing their research experience and touring sites of the Kentucky Seismic and Strong-Motion Network in the western part of the state. Weeks later, four KGS and University of Kentucky scientists, including KGS Director Jim Cobb and geologic hazards section head Zhenming Wang, visited Gansu as guests of the institute and the China Earthquake Administration. Both sides stressed the instructive similarities between their regions — histories of large earthquakes, instrument monitoring, and hazardous soft ground — and planned continuing exchanges of researchers and graduate students and a workshop on identifying active faults.

The exchange in practice

The programme developed into a sustained collaboration. Researchers and students travelled in both directions; Chinese seismologists spent a year at Kentucky as visiting scholars; joint field work assessed seismic hazards around Tianshui; and cooperative studies produced scientific papers on earthquakes in both countries. In 2009 three Kentucky scientists were invited to Tianshui from late July to early August — the fourth trip by Kentucky scientists to China under the programme, matched by an equal number of Chinese trips to Kentucky. After the 2008 Wenchuan earthquake, the exchange took on a reconstruction role: in June 2010 a Kentucky delegation travelled to Gansu to provide technical support in areas of southeast Gansu affected by the quake, visiting remote communities where homes and schools were being rebuilt, and lecturing on earthquake science and mitigation policy at the Lanzhou Institute and at the Institute of Crustal Dynamics in Beijing. The six-year-old exchange, the university reported, had become crucial to improving structural seismic resistance after the disaster.

Renewal for a thirteenth year

The exchange's longevity is itself notable. Under a memorandum of agreement signed in Lanzhou, the programme was renewed for a thirteenth year, with State Geologist and KGS Director Bill Haneberg signing alongside Lanzhou Institute Director Lanmin Wang. The renewed memorandum called for continued exchange of researchers, joint research on slope stability in locations where earthquakes can cause landslides, development of hazard maps for regions in China, and joint research papers. During the programme, participants collected and exchanged seismic data, assisted with field work, maintained seismic instruments, took part in seminars, and carried out seismic-reflection profiling of active faults. Chinese researchers involved in the exchange published work in the Journal of Soil Dynamics and Earthquake Engineering and the Bulletin of the Seismological Society of America, and ground-motion investigations using data from the 2008 Wenchuan earthquake were pursued jointly, with the aim of improving predictions of ground motion from large earthquakes in the central United States.

People

The institute's public record is closely associated with its long-serving director Lanmin Wang, a specialist in engineering seismology and loess dynamics who signed the Kentucky memoranda and led the 2005 delegation to Kentucky alongside professors Yucheng Shi and Daoyang Yuan, whose fields are engineering seismology and geology respectively. On the American side, the partnership ran through successive KGS directors Jim Cobb and Bill Haneberg and geologic hazards section head Zhenming Wang — himself a scientific bridge between the two institutions — with University of Kentucky geologist Edward Woolery a frequent participant. Visiting scholars from Lanzhou, such as Qian Li, worked at Kentucky within the geologic hazards group. These personal continuities explain the exchange's durability: it was maintained by named scientists over more than a decade, not by a single ceremonial agreement.

Publication and data work

Beyond the exchange, the institute's researchers publish in seismology, engineering geology and natural hazards journals, work with regional seismic data, and contribute the field investigations and historical records on which wider studies depend. Its data contribution is visible in the modern literature: landslide researchers explicitly build on the institute's systematic twentieth-century field investigations, and its scientists appear as authors on contemporary method papers such as the rapid intensity estimation study of 2023. The institute also functions within the CEA's wider system — older surveys list it among the bureau's fourteen major affiliated institutions, alongside the institutes of geophysics, geology and engineering mechanics — as the system's northwestern seismological centre.

Significance

The Lanzhou Institute of Seismology matters because it concentrates earthquake expertise where China's seismic risk and its most instructive earthquake landscapes coincide. Its combination of active-fault field science, loess and landslide research, regional hazard assessment and a uniquely durable trans-Pacific research exchange has made it both a guardian of the historical record of China's greatest earthquakes and a working partner in reducing future losses — in Gansu, and, through the Kentucky connection, in the American Midwest as well.