当前位置: X-MOL 学术Seismol. Res. Lett. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
The 1922 Peninsula Malaysia Earthquakes: Rare Intraplate Seismicity within the Sundaland Block in Southeast Asia
Seismological Research Letters ( IF 3.3 ) Pub Date : 2020-09-01 , DOI: 10.1785/0220200052
Stacey Servito Martin, Yu Wang, Muzli Muzli, Shengji Wei

Seismic hazard in the southern Malay Peninsula located within the Sundaland block in Southeast Asia is poorly understood. The paucity of historical earthquakes and low‐magnitude instrumented seismicity has led to the assumption that this region is largely aseismic. We question this point of view by reassessing historical seismicity in this region and, in particular, a pair of moderate earthquakes in the 1920s. The first of these struck on 31 January 1922 at ≈9:10 a.m. local time (LT) for which we estimate an intensity magnitude (⁠MI⁠) ≈5.4⁠, and for the second earthquake on 7 February 1922 at ≈12:15 p.m. LT, we estimate MI≈5.0⁠. We also identify at least 34 felt earthquakes between 1803 and 1950 that were potentially local within the Sundaland block. These include a very widely felt shock (or set of shocks) on 26 June 1874 that was felt in parts of Borneo, Java, and Sumatra. The discovery of these earthquakes challenges the tectonic stability of the Malay Peninsula and the stable interior of the Sundaland block. The record of historical seismicity in this region relies heavily on European sources, and we recommend locating and consulting indigenous sources to improve the current understanding of regional seismic hazard. We also underscore the need to evaluate the impact of ground motions from rare local earthquakes on the extant building stock and on transportation infrastructure that are otherwise relatively immune to the long‐period effects of distant earthquakes commonly felt in the Malay Peninsula.

中文翻译:

1922年马来西亚半岛地震:东南亚Sundaland地块内的罕见板内地震活动

人们对在东南亚的da他兰地块内的马来半岛南部的地震危险知之甚少。缺乏历史地震和低强度仪器化地震活动导致人们认为该地区大部分是抗震的。我们通过重新评估该地区的历史地震活动性,尤其是1920年代两次中等地震,质疑这一观点。第一场地震于1922年1月31日在当地时间(LT)≈9:10发生,据此我们估计出强度等级(⁠MI⁠)≈5.4⁠,第二次地震于1922年2月7日在≈12:15下午LT,我们估计MI≈5.0⁠。我们还确定了1803年至1950年之间的至少34场感觉到的地震,这些地震可能是在Sundaland区块内发生的。其中包括1874年6月26日在婆罗洲,爪哇和苏门答腊部分地区感受到的广泛震动(或一系列震动)。这些地震的发现挑战了马来半岛的构造稳定性和da他兰地块的稳定内部。该地区的历史地震活动记录在很大程度上取决于欧洲的资料来源,我们建议定位并咨询本地资料来源,以增进对地区地震危险性的当前了解。我们还强调有必要评估罕见的局部地震对现有建筑物和运输基础设施的地震动的影响,否则这些建筑物相对不受马来半岛通常感受到的远距离地震的长期影响。这些地震的发现挑战了马来半岛的构造稳定性和da他兰地块的稳定内部。该地区的历史地震活动记录在很大程度上取决于欧洲的资料来源,我们建议定位并咨询本地资料来源,以增进对地区地震危险性的当前了解。我们还强调有必要评估罕见的局部地震对现有建筑物和运输基础设施的地震动的影响,否则这些建筑物相对不受马来半岛通常感受到的远距离地震的长期影响。这些地震的发现挑战了马来半岛的构造稳定性和da他兰地块的稳定内部。该地区的历史地震活动记录在很大程度上取决于欧洲的资料来源,我们建议定位并咨询本地资料来源,以增进对地区地震危险性的当前了解。我们还强调有必要评估罕见的局部地震对现有建筑物和运输基础设施的地震动的影响,否则这些建筑物相对不受马来半岛通常感受到的远距离地震的长期影响。我们建议定位并咨询土著资源,以增进对区域地震危险性的当前了解。我们还强调有必要评估罕见的局部地震对现有建筑群和运输基础设施的地震动的影响,否则这些建筑相对不受马来半岛通常感受到的远距离地震的长期影响。我们建议找到并咨询土著资源,以增进对区域地震危害的当前了解。我们还强调有必要评估罕见的局部地震对现有建筑物和运输基础设施的地震动的影响,否则这些建筑物相对不受马来半岛通常感受到的远距离地震的长期影响。
更新日期:2020-09-03
down
wechat
bug