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Periodic slow earthquakes on the flank of Kilauea volcano, Hawai'i

机译:夏威夷基拉韦厄火山侧翼的周期性缓慢地震

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摘要

We analyze 8 years of continuous GPS data from the Hilina slump (HS) on Kilauea volcano's south flank and identify 3 new slow earthquake (SE) events. The new SEs are very similar to the previously identified one from November 2000, suggesting they share a common source. The series of SEs are separated by regular periods of 774 (+/- 7) days. None of the newly identified events are associated with increased rainfall rates, precluding rainfall as a necessary SE trigger. All of the SEs are followed by increased microseismicity in a similar to NW-SE trending band in the southern HS, suggesting that the SEs trigger seismicity. SE location and source parameters are not well-constrained by the CGPS network, although moment can be constrained adequately for the January 2005 event. Using this as a reference, we calculate for the four events equivalent moment magnitude values of 5.6, 5.7, 5.5, and 5.8, in their order of occurrence. (c) 2006 Elsevier B.V. All rights reserved.
机译:我们分析了基拉韦厄火山南翼Hilina坍落度(HS)连续8年的GPS数据,并确定了3个新的慢地震(SE)事件。新的SE与之前确定的2000年11月的SE非常相似,表明它们具有相同的来源。 SE系列由774(+/- 7)天的定期间隔分开。新近识别出的事件均与降雨率增加无关,并没有将降雨作为必要的SE触发因素。所有SE都跟随着类似于南HS的NW-SE趋势带的增加的微地震活动性,这表明SE触发了地震活动。 SE的位置和源参数不受CGPS网络的约束,尽管对于2005年1月的事件可以适当地约束力矩。以此为参考,我们针对四个事件按其出现顺序计算了等效矩幅度值5.6、5.7、5.5和5.8。 (c)2006 Elsevier B.V.保留所有权利。

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