已入深夜,您辛苦了!由于当前在线用户较少,发布求助请尽量完整地填写文献信息,科研通机器人24小时在线,伴您度过漫漫科研夜!祝你早点完成任务,早点休息,好梦!

Aftershock Sequence and Statistics of the 2017 Mw 5.5 Pohang, South Korea, Earthquake: Implications of Fault Heterogeneity and Postseismic Relaxation

余震 地震学 地质学 前震 断层(地质) 应力场 地震灾害 序列(生物学) 构造学 地震构造 地震记录 空间分布 地震间隙 生物 热力学 物理 有限元法 遥感 遗传学
作者
Jeong‐Ung Woo,Minook Kim,Junkee Rhie,Tae‐Seob Kang
出处
期刊:Bulletin of the Seismological Society of America [Seismological Society of America]
卷期号:110 (5): 2031-2046 被引量:12
标识
DOI:10.1785/0120200059
摘要

ABSTRACT The sequence of foreshocks, mainshock, and aftershocks associated with a fault rupture is the result of interactions of complex fault systems, the tectonic stress field, and fluid movement. Analysis of shock sequences can aid our understanding of the spatial distribution and magnitude of these factors, as well as provide seismic hazard assessment. The 2017 Mw 5.5 Pohang earthquake sequence occurred following fluid-induced seismic activity at a nearby enhanced geothermal system site and is an example of reactivation of a critically stressed fault system in the Pohang basin, South Korea. We created an earthquake catalog based on unsupervised data mining and measuring the energy ratio between short- and long-window seismograms recorded by a temporary seismic network. The spatial distribution of approximately 4000 relocated aftershocks revealed four fault segments striking southwestward. We also determined that the three largest earthquakes (ML>4) were located at the boundary of two fault segments. We infer that locally concentrated stress at the junctions of the faults caused such large earthquakes and that their ruptures on multiple segments can explain the high proportion of non-double-couple components. The area affected by aftershocks continues to expand to the southwest and northeast by 0.5 and 1 km decade−1, respectively, which may result from postseismic deformation or sequentially transferred static coulomb stress. The b-values of the Gutenberg–Richter relationship temporarily increased for the first three days of the aftershock sequence, suggesting that the stress field was perturbed. The b-values were generally low (<1) and locally variable throughout the aftershock area, which may be due to the complex fault structures and material properties. Furthermore, the mapped p-values of the Omori law vary along strike, which may indicate anisotropic expansion speeds in the aftershock region.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
PDF的下载单位、IP信息已删除 (2025-6-4)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
好久不见完成签到 ,获得积分10
2秒前
英俊的铭应助几酝采纳,获得30
3秒前
aa完成签到,获得积分10
5秒前
Doris完成签到 ,获得积分10
5秒前
Chi_bio关注了科研通微信公众号
6秒前
CodeCraft应助hhhi采纳,获得10
9秒前
一直向前发布了新的文献求助10
11秒前
15秒前
18秒前
18秒前
AFM发布了新的文献求助10
23秒前
24秒前
独特跳跳糖完成签到 ,获得积分10
24秒前
立军完成签到,获得积分10
27秒前
Sarah完成签到 ,获得积分10
28秒前
落晖完成签到 ,获得积分10
28秒前
Chi_bio发布了新的文献求助10
28秒前
xx1234567890发布了新的文献求助10
29秒前
张aa完成签到 ,获得积分10
29秒前
风鱼完成签到 ,获得积分10
30秒前
没有昵称完成签到 ,获得积分10
33秒前
三井库里发布了新的文献求助10
35秒前
39秒前
洛芷发布了新的文献求助10
42秒前
在水一方应助hugeng采纳,获得10
42秒前
Eliauk完成签到 ,获得积分10
44秒前
Jepsen完成签到 ,获得积分10
44秒前
44秒前
hhhi发布了新的文献求助10
49秒前
空里流霜不觉飞完成签到 ,获得积分10
50秒前
53秒前
hugeng完成签到,获得积分10
54秒前
noothinh完成签到,获得积分10
55秒前
Chi_bio完成签到,获得积分10
56秒前
lizigongzhu完成签到,获得积分10
56秒前
hugeng发布了新的文献求助10
57秒前
ding应助昏睡的南霜采纳,获得10
58秒前
ding应助曹大壮采纳,获得10
58秒前
yydragen应助黎乐荷采纳,获得30
58秒前
58秒前
高分求助中
A new approach to the extrapolation of accelerated life test data 1000
ACSM’s Guidelines for Exercise Testing and Prescription, 12th edition 500
Indomethacinのヒトにおける経皮吸収 400
Phylogenetic study of the order Polydesmida (Myriapoda: Diplopoda) 370
基于可调谐半导体激光吸收光谱技术泄漏气体检测系统的研究 350
Robot-supported joining of reinforcement textiles with one-sided sewing heads 320
Aktuelle Entwicklungen in der linguistischen Forschung 300
热门求助领域 (近24小时)
化学 材料科学 医学 生物 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 遗传学 基因 物理化学 催化作用 冶金 细胞生物学 免疫学
热门帖子
关注 科研通微信公众号,转发送积分 3989918
求助须知:如何正确求助?哪些是违规求助? 3532013
关于积分的说明 11255831
捐赠科研通 3270829
什么是DOI,文献DOI怎么找? 1805053
邀请新用户注册赠送积分活动 882233
科研通“疑难数据库(出版商)”最低求助积分说明 809216