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首页> 外文期刊>Seismological Research Letters >Implementation of Routine Regional Moment Tensor Analysis in New Zealand
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Implementation of Routine Regional Moment Tensor Analysis in New Zealand

机译：在新西兰实施常规区域矩张量分析

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The active tectonics of New Zealand are dominated by three main features (figure 1). Beneath the North Island there is active subduction of the Hikurangi trough where the Pacific plate is undergoing oblique subduction beneath the Australian plate at 45 mm/yr (e.g., Demets et al. 1990; Demets et al. 1994). The Hikurangi trough extends from the Kermadec trench in the north and terminates in the upper South Island. Large subduction zone earthquakes of around Mw 8.0 in the lower North Island and around Mw 6.9 farther north are expected (Reyners 1998). Slow slip events have also been observed on the Hikurangi subduction interface (e.g., Wallace and Beavan 2006) similar to those documented at other Pacific Rim subduction margins (e.g., Dragert et al. 2001; Obara et al. 2004; Larson et al. 2004). A number of dextral strike-slip faults are also present throughout the North Island and the upper South Island and have produced a number of M 6.0–7.5 earthquakes in the past century (Doser and Webb 2003). The Wellington region is cut by five active dextral faults that have average recurrence intervals of meter-scale surface rupture that range from 500 to 5,000 years (Van Dissen and Berryman 1996). The Wairarapa fault is the only one of these to have ruptured in historic times, in 1855, in an event estimated at Mw 8.2 (Darby and Beanland 1992).
机译：新西兰的活跃构造以三个主要特征为主导（图1）。在北岛下方有Hikurangi槽活跃俯冲，太平洋板块以45毫米/年的速度在澳大利亚板块下方斜向俯冲（例如Demets等1990; Demets等1994）。 Hikurangi槽从北部的Kermadec trench沟延伸，终止于南岛上部。预计在北岛下部将发生8.0 Mw左右的大俯冲带地震，而在更北的6.9 Mw附近将发生大的俯冲带地震（Reyners 1998）。在Hikurangi俯冲界面上也观察到了慢滑事件（如Wallace和Beavan 2006），与其他环太平洋俯冲边缘处所记录的类似（如Dragert等，2001； Obara等，2004； Larson等，2004）。 ）。在整个北岛和上南岛，还存在许多右旋走滑断层，在过去的一个世纪中产生了6.0至7.5次M级地震（Doser和Webb 2003）。惠灵顿地区被五个活跃的右旋断层切断，这些断层的平均复发间隔为米级表面破裂，范围为500至5,000年（Van Dissen和Berryman 1996）。怀拉拉帕断层是历史上唯一一次破裂的断层，该断层于1855年发生，估计事件发生在8.2兆瓦时（Darby and Beanland 1992）。

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