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Relocations of Earthquakes (1899–1917) in South-Central Alaska

机译：阿拉斯加中南部地震（1899–1917年）的迁移

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摘要

I have relocated 18 earthquakes occurring in the south-central Alaska region between 1899 and 1917 using a bootstrap relocation technique. Locations of events within the Yakutat region suggest that the 1899 sequence began on 4 September with a MS = 7.9 event within the area of the Pamplona fault zone/western Transition fault zone, rupturing the western portion of the North American/Pacific plate interface. A MS = 7.4 event on 10 September appears to have ruptured the offshore portion of the plate interface to the east of the 4 September event. This was followed by a MS = 8.0 event that likely ruptured the onshore and down-dip portion of the plate interface. A MS = 7.0 event in 1908 may have ruptured a small portion of the plate interface between the 4 September and 10 September events. Events occurring between 1911 and 1916 in the Prince William Sound region appear to be slab events occurring in similar locations to more recent seismicity. Within the Kodiak region the 1900 earthquake of MS = 7.7 has a location consistent with the rupture of the Kodiak asperity which also ruptured during the 1964 great Alaska earthquake. Other large magnitude Kodiak events appear to be associated with regions of recent seismicity, including the Karluk Lake area of southwestern Kodiak Island and the Albatross Basin located offshore southeast of Kodiak Island. Space-time seismicity patterns since 1899 indicate that magnitude 6 to7 events have occurred with regularity in the Kodiak Island region; that there has been a lack of magnitude ≥ 6 events in the Prince William Sound region since 1964, and that the Yakutat region has remained notably quiescent at the magnitude ≥ 6 level.
机译：我使用自举重定位技术将1899年至1917年之间在阿拉斯加中南部地区发生的18次地震进行了迁移。雅库塔特地区事件的发生位置表明，1899年序列于9月4日开始，在潘普洛纳断裂带/西过渡断裂带区域内发生MS = 7.9事件，从而破坏了北美/太平洋西部。板接口。 9月10日的MS = 7.4事件似乎使9月4日事件以东的板块界面近海部分破裂。其次是MS = 8.0事件，该事件可能会使板块界面的陆上和下倾部分破裂。 1908年的MS = 7.0事件可能已经破坏了9月4日至9月10日事件之间一小部分板块界面。 1911年至1916年之间发生在威廉王子湾地区的事件似乎是平板事件，发生在与最近地震活动相似的位置。在科迪亚克地区，1900年MS = 7.7地震的位置与科迪亚克粗糙的破裂一致，后者在1964年阿拉斯加大地震中也破裂了。其他大规模的科迪亚克事件似乎与最近的地震活动有关，包括科迪亚克岛西南部的卡尔鲁克湖地区和科迪亚克岛东南部的信天翁盆地。自1899年以来的时空地震活动模式表明，在科迪亚克岛地区定期发生6至7级地震。自1964年以来，威廉王子湾地区一直缺少6级以上的事件，而雅库塔特地区在6级以上仍显着静止。

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