Projects | Earthquake Geology - Kerry Sieh

The basaltic Bolaven volcanic field covers 11,000 km2 of southern Laos and has erupted often in the past half-a-million years. Nonetheless, the exposure of populations and infrastructure to its volcanic hazards is unknown. We propose to assess quantitatively human exposure to its hazards. Our... Read more

This project is a multi-lateral collaboration between several EOS researchers and colleagues at other research institutions to study the tectonics and earthquakes of Southeast Asia. The project focuses on active faults of Myanmar, Thailand and adjoining countries. There are three major... Read more

A critical qualitative and quantitative analysis of primary sources is key to validate, improve, and supplement the census of historical earthquakes in Indonesia, which in turn is key to the assessment of regional seismic hazard. We propose to collect documentary evidence from the Dutch... Read more

Formally established in September 2016, the Singapore‐WiscAr Partnership (SWAP) facilitates collaboration between the Earth Observatory of Singapore and the WiscAr Geochronology Laboratory at the University of Wisconsin‐Madison, with emphasis on studies of earthquake science and volcanology... Read more

Over the past few years, we assembled evidence that the impact crater of the Australasian tektites lies beneath the Bolaven Plateau volcanic field in Southern Laos. Geochronological, gravimetric and sedimentologic tests in FY2017 further support the hypothesis. In FY2018 we will publish three... Read more

Between 2015 to 2017, we developed probabilistic seismic hazard maps for Southeast Asia from a uniform set of databases, a series of ground-shaking scenarios, and an innovative approach for probabilistic seismic hazard assessment (PSHA). We envision this integration of databases and approaches... Read more

Past Projects

Paleotsunami studies have shown that the 2004 Indian Ocean tsunami could have been anticipated. Nonetheless, important gaps in our understanding of past tsunami sources, characteristics and timing remain. At our Aceh Coastal Cave site, we propose to resolve important gaps in the record and... Read more

The marine geophysical data collected during the 2015 MEGA-TERA expedition provide a unique window into the near-trench structure of the Sumatran accretionary wedge. We are building detailed geological cross sections and reconstructions of the imaged faults and sedimentary units. From this, we... Read more

The project, funded by the Australian Research Council (ARC), aims to provide a new understanding of Indo-­Pacific history post-­1000 C.E. based on an enhanced understanding of the inter-­relationship between natural environmental cycles and events, and social and political cycles and events. By... Read more

The Aceh Geohazards Project combines geology, geomorphology, history and archaeology to better understand the past occurrence of tsunami in Aceh, and the extent to which such events might have impacted past societies. Our research has shown that the immediate predecessors of the 2004 tsunami... Read more

History shows that the fault system of the Shan Plateau poses a high seismic hazard. Slip rates and earthquake recurrence intervals of these faults are key to a better quantification of that hazard. However, estimates of reliable slip rates from geodetic and geological observations are very... Read more

Our new active-fault database and UAV survey results reveal new details of fault geometry along the central Sagaing fault. In 2015, we conducted paleoseismic studies along the Sagaing fault near the northern termination of the 1839 earthquake rupture and excavated one paleoseismological trench... Read more

We wish to understand the roles that active faults play in accommodating Sumatra’s oblique plate convergence and the potential hazards to society associated with them. To this end, we are measuring long-term Sumatran Fault slip rates by dating laterally offset features. Thus far, we have revised... Read more

We have shown that the immediate predecessors of the great 2004 tsunami occurred six centuries ago and devastated a 14th century coast settlement. We are now conducting a far more comprehensive interdisciplinary investigation of the interactions of coastal processes and settlements along the... Read more

Investigation of fault ruptures and other tectonic deformation immediately following earthquakes has taught us a great deal about the nature of earthquake sources. In particular, we have investigated the Landers earthquake (1992), the Imperial Valley earthquake (1979), the Chi-Chi, Taiwan,... Read more

Our studies of the spectacular 80-km rupture of the Chelungpu thrust fault of 1999 introduced us to the neotectonic wonders of Taiwan. Since the earthquake, we have produced a new neotectonic map and interpretation of the Taiwan orogen and focussed on the eastern of its two active sutures.

... Read more

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