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Stable Continental Region Earthquakes in South China

机译：中国南方大陆稳定地震

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— This paper reviews some remarkable characteristics of earthquakes in a Stable Continental Region (SCR) of the South China Block (SCB). The kernel of the SCB is the Yangtze platform solidified in late Proterozoic time, with continental growth to the southeast by a series of fold belts in Paleozoic time. The facts that the deviatoric stress is low, the orientations of the major tectonic features in the SCB are substantially normal to the maximum horizontal principal stress, and a relatively uniform crust, seem to be the major reasons for lack of significant seismicity in most regions of the SCB. Earthquakes in this region are mainly associated with three seismic zones: (1) the Southeast China Coast seismic zone related to Guangdong-Fujian coastal folding belt (associated with Eurasia-Philippine Sea plate collision); (2) the Southern Yellow Sea seismic zone associated with continental shelf rifts and basins; and (3) the Downstream Yangtze River seismic zone spatially coinciding with Tertiary rifts and basin development. All three seismic zones are close to one or two major economic and population centers in the SCB so that they pose significant seismic hazards. Earthquake focal mechanisms in the SCB are consistent with strike-slip to normal faulting stress regimes. Because of the global and national economic significance of the SCB and its dense population, the seismic hazard of the region is of outstanding importance. Comparing the SCB with another less developed region, a pending earthquake with the same size and tectonic setting would cause substantially more severe social and economic losses in the SCB. This paper also compiles an inventory of historic moderate to great earthquakes in the SCB; most of the data are not widely available in English literature.
机译：—本文回顾了华南地块（SCB）稳定大陆地区（SCR）的一些地震特征。 SCB的核心是在元古代晚期凝固的扬子地台，在古生代时期通过一系列褶皱带向东南方向大陆扩张。偏应力低，SCB中主要构造特征的方向基本垂直于最大水平主应力以及地壳相对均匀的事实，似乎是该地区大多数地区缺乏明显地震活动性的主要原因。 SCB。该地区的地震主要与三个地震带有关：（1）与粤闽沿海折叠带有关的东南沿海地震带（与欧亚-菲律宾海板块碰撞有关）； （2）与大陆架裂谷和盆地有关的南黄海地震带； （3）长江下游地震带在空间上与第三纪裂谷和盆地发育相吻合。这三个地震带都靠近SCB的一两个主要经济和人口中心，因此它们构成了严重的地震危险。 SCB中的地震震源机制与正常断层应力状态下的走滑一致。由于SCB及其人口密集的全球和国家经济意义，该地区的地震危险非常重要。将渣打银行与另一个欠发达地区进行比较，一场规模相同，构造背景相同的地震将在渣打银行造成更大的社会和经济损失。本文还汇编了SCB中的历史性中到大地震清单。大多数数据在英国文学中并不广泛。

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