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One tick of the time bomb: An increment of slip along the Sagaing Fault, Myanmar
Organised by:
Thames Valley Regional Group
Venue:
Queen's Lecture Theatre, Queen's Building, Royal Holloway University, Egham
Event status:
EVENT CLOSED
Speaker: Dr Ian Watkinson, Royal Holloway University
The Sagaing Fault is a 1500 km long structure passing through Myanmar that presently accommodates ~ 18 mm/yr of the lateral motion between India / West Myanmar and Sundaland.
A Mw6.8 earthquake close to Thabeikkyin city, 100 km north of Mandalay, occurred on 11th November 2012. It produced an exceptionally well-developed surface rupture 40 km long with 1.02 m of dextral displacement.
The rupture is characterised by en-echelon synthetic Riedel shears ranging from a few centimetres to 40 metres long. Large scale complexities, such as restraining and releasing step-overs and a wide termination splay, are controlled by long-lived faults below the shallow Quaternary sediments. This indicates that the Sagaing Fault is segmented, influencing predictions of future earthquake propagation mechanisms and magnitude.
The 2012 earthquake may have brought three adjacent structures, each capable of producing a M>7.9 earthquake, closer to failure. These structures pose a significant hazard to the millions of people who live along them in cities such as Mandalay, Nay Pyi Taw and Yangon.
- Numbers are required for catering, please RSVP if you plan to attend: [email protected]