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![A: Location map of seismic experiment in south China. Study area is indicated by dot in inset map of East Asia. Seismic data generated by shots along two offshore seismic lines (lines 1 and 2) were recorded by eight onshore seismic stations in Guangdong Province in south China (triangles) and eight in Hong Kong (dots). Box in center shows spatial extent of Hong Kong region in this study (B and Fig. 2). B: Map of Hong Kong region showing locations of major faults in Hong Kong (after Ding and Lai, 1997; Megawati, 2007). Note that all faults in offshore regions, including Dangan Island fault zone located immediately south of Lianhuashan fault zone, are inferred from faults observed on land.]()
![A: Along-strike velocity anomaly and crustal structure of Dangan Island fault zone (DIFZ) (profile 1 in Fig. 2B). Velocity anomaly is calculated based on one-dimensional velocity-depth profile in study area. B: Profile showing velocity anomaly and crustal structure of Hong Kong, DIFZ, and South China Sea (profile 2 in Fig. 2B). Location of other profile is indicated in both diagrams. Regions r1, r4, and r5 correspond to those shown in Figure 2B. Note that r1 and r5 appear to form one geologic region separated by feature “a” in Figure 2 (B1, B2). Interpreted regions with fractured granites are based on surface observations and anomalously low velocity relative to igneous regions r1 and r5. See text for details.]()
![A: 1–3. Slices of seismic velocity model. B: 1–3. Seismic velocity anomaly. C: 1–3. Recovered velocity anomaly in checkerboard test at depths of 2, 10, and 20 km below surface. Seismic velocity anomaly is based on average one-dimensional velocity-depth profile in study area (Fig. 3A). Gray areas indicate regions with no ray coverage. Microseismic events (blue dots) are indicated. Large star represents location of MS 5.75 earthquake; small star indicates location of ML 4.0 earthquake (see text). Dotted lines delimit well-resolved areas at lateral scale of 0.2° (∼20 km) or larger. This is based on comparing recovered anomalies from checkerboard test (C, 1–3) with original checkerboard velocity anomalies, shown in Figure DR2 (see footnote 1). Regions (r1–r5) and feature “a” in well-resolved areas are discussed in text. Profile 1 corresponds to location of along-strike crustal variation of Dangan Island fault zone, as shown in Figure 3A, whereas profile 2 refers to across-strike section in Figure 3B.]()
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1-10 OF 10 RESULTS FOR
Dangan Island Fault
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Journal Article
Hybrid Simulations of Ground Motions from Local Earthquakes Affecting Hong Kong Available to Purchase
Publisher: Seismological Society of America
Published: 01 August 2007
Bulletin of the Seismological Society of America (2007) 97 (4): 1293–1307.
... of occurrence of local, large-magnitude earthquakes. The fact that the Dangan Island fault, which has generated a moderate earthquake in 1874, lies only 30 km southeast of Hong Kong, warrants a thorough investigation on the likely ground-motion intensities that may be produced by local earthquakes in the future...
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Journal Article
Three-dimensional tomographic model of the crust beneath the Hong Kong region Available to Purchase
Journal: Geology
Publisher: Geological Society of America
Published: 01 January 2012
Geology (2012) 40 (1): 59–62.
...Shaohong Xia; Xuelin Qiu; C.H. Tong; Huilong Xu; Minghui Zhao Abstract We present the first three-dimensional seismic velocity model of the Hong Kong region, including the Dangan Island fault zone (DIFZ). The crust beneath Hong Kong is predominantly igneous, and is characterized by relatively high...
FIGURES
Image
A: Location map of seismic experiment in south China. Study area is indicat... Available to Purchase
Published: 01 January 2012
Dangan Island fault zone located immediately south of Lianhuashan fault zone, are inferred from faults observed on land.
Image
A: Along-strike velocity anomaly and crustal structure of Dangan Island fau... Available to Purchase
Published: 01 January 2012
Figure 3. A: Along-strike velocity anomaly and crustal structure of Dangan Island fault zone (DIFZ) (profile 1 in Fig. 2B ). Velocity anomaly is calculated based on one-dimensional velocity-depth profile in study area. B: Profile showing velocity anomaly and crustal structure of Hong Kong, DIFZ
Image
A: 1–3. Slices of seismic velocity model. B: 1–3. Seismic velocity anomaly.... Available to Purchase
Published: 01 January 2012
of Dangan Island fault zone, as shown in Figure 3A , whereas profile 2 refers to across-strike section in Figure 3B .
Journal Article
Fault‐Plane Determination of the 4 January 2020 Offshore Pearl River Delta Earthquake and Its Implication for Seismic Hazard Assessment Available to Purchase
Journal: Seismological Research Letters
Publisher: Seismological Society of America
Published: 06 January 2021
Seismological Research Letters (2021) 92 (3): 1913–1925.
... earthquake) and moderate events (23 June 1874 M w 5.8 Dangan Island earthquake, 15 May 1911 M w 6 Honghai Bay earthquake, and 14 September 2006 M L 4.0 Dangan Island earthquake). The northwest‐trending faults are in a relatively small scale, with the largest documented event being...
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Includes: Supplemental Content
Journal Article
Neotectonic fault activity in Hong Kong: evidence from seismic events and thermoluminescence dating of fault gouge Available to Purchase
Journal: Journal of the Geological Society
Publisher: Geological Society of London
Published: 01 December 1997
Journal of the Geological Society (1997) 154 (6): 1001–1007.
... include: the Ms 6.0 event in Honghai Bay (85 km east of Hong Kong) on 15 May 1911, the Ms 5.5 event near Macau on 12 August 1905 and the Ms 5.75 event near the Dangan Islands on 23 June 1874. These and other smaller events are considered to be mainly related to displacements on either NE-trending faults...
Journal Article
High‐Resolution Crustal Shear‐Wave Velocity Structure in the Pearl River Delta, South China Available to Purchase
Journal: Seismological Research Letters
Publisher: Seismological Society of America
Published: 15 September 2021
Seismological Research Letters (2022) 93 (1): 338–350.
... of Dangan Island in the PRD has been listed as an area with potential for an M w 7.5 earthquake ( Xia et al. , 2018 ). According to numerical simulations of ground motions ( Megawati, 2007 ), Hong Kong too is at the risk of earthquake disasters in the magnitude range of M w 6.0–6.5...
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Includes: Supplemental Content
Journal Article
Rupture Dynamics of the Middle Section of Littoral Fault Zone: Potential Maximum Magnitude and Cascading Rupture Analysis Available to Purchase
Journal: Seismological Research Letters
Publisher: Seismological Society of America
Published: 15 April 2025
Seismological Research Letters (2025)
...), the middle segment (the Pearl River Estuary, Fig. 1 ), and the eastern segment (from eastern Guangdong to Fujian) (Fig. 1 , Yang et al. , 2022 ). The middle segment of LFZ is ∼12 km offshore from Dangan Island in Zhuhai City, Guangdong Province. It dips southeastward and spans about 20 km in width ( Cao...
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Early Publication
Includes: Supplemental Content
Journal Article
Site-Specific Probabilistic Seismic-Hazard Assessment: Direct Amplitude-Based Approach Available to Purchase
Publisher: Seismological Society of America
Published: 01 April 2006
Bulletin of the Seismological Society of America (2006) 96 (2): 392–403.
.... (in press). Chau , K. T. , K. W. Lai , Y. L. Wong , R. H. C. Wong , L. X. Wang , Y. W. Chan , W. T. Wong , Y. S. H. Guo , and W. Zhu ( 2004 ). Three-dimensional surface cracking and faulting in Dangan Islands area, south of Hong Kong , in Proc. of the 3rd...
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