SGER: Coral uplift associated with the Sumatran earthquakes of September 2007

本SGER建议书要求支付与2007年9月8.4级和7.9级地震有关的Pagai和Sipora岛周围海岸隆起的调查费用。那里发生了显著的隆起，上升的火山岩头远远高于海平面（通常几十厘米，局部超过1米）。已知这些水头在低潮时接近海平面（在厘米内），因此它们的合并提供了同震抬升的测量（对潮汐效应进行了适当的校正）。除了现有的SUGAR GPS测量数据外，该数据集还将提供特大逆冲断层共同滑动的特殊限制。该研究将揭示大型逆冲断层地震特征的重要信息，并对苏门答腊岛产生直接的社会影响，那里的巴塘（超过100万居民）面临着M8.5海啸地震的风险。这项研究将与我们的印度尼西亚合作伙伴合作进行，并将为研究生提供关键数据。

This SGER proposal is requested to cover the cost of surveying coastal uplift around thePagai and Sipora islands related to the M8.4 and 7.9 earthquakes of September 2007.Significant uplift has occurred there, rising porites heads well above the sea level (severaltens of centimeters typically and locally more than 1 meter). These heads are known togrow close (within centimeters) to the sea level at the time of the low tides and theiremergence thus provides a measurement of co-seismic uplift (with appropriate correctionfor tidal effects). This data set will provide exceptional constraints, in addition to theexisting SUGAR GPS measurements, on the co-slip on the megathrust.This research will shed important light on the characteristics of large megathrustearthquakes, with direct societal implication for Sumatra, where Padang (over 1 millioninhabitants) is exposed to the risk of a M8.5 tsunamigenic earthquake. This researchwill be conducted in collaboration with our Indonesian partners and will provide key datafor graduate students.