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Pohang earthquake 2017

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Journal Article

Earthquake-Induced Ground Deformations in the Low-Seismicity Region: A Case of the 2017 M5.4 Pohang, South Korea, Earthquake

Sinhang Kang, Byungmin Kim, M. EERI, Sungjin Bae, Hyejin Lee, Mirae Kim
Published: 01 August 2019
Earthquake Spectra (2019) 35 (3): 1235–1260.
DOI: https://doi.org/10.1193/062318EQS160M
...Sinhang Kang; Byungmin Kim, M. EERI; Sungjin Bae; Hyejin Lee; Mirae Kim A moment magnitude 5.4 earthquake struck the Pohang city located in the southeastern Korean Peninsula on 15 November 2017, possibly triggered by an enhanced geothermal system. Despite the moderate magnitude of the earthquake...
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Rupture Process of the 2017 M w 5.5 Pohang, South Korea, Earthquake via an Empirical Green’s Function Method

Eunbyeol Cho, Jeong‐Ung Woo, Junkee Rhie, Tae‐Seob Kang, So‐Young Baag
Published: 11 January 2023
Bulletin of the Seismological Society of America (2023) 113 (2): 592–603.
DOI: https://doi.org/10.1785/0120220161
...Eunbyeol Cho; Jeong‐Ung Woo; Junkee Rhie; Tae‐Seob Kang; So‐Young Baag ABSTRACT The M w 5.5 earthquake occurred in Pohang, South Korea on 15 November 2017, which is known as a “runaway earthquake,” and was triggered from a critical‐state fault as a result of fluid injection. As such earthquakes...
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Stress‐Drop Scaling of the 2016 Gyeongju and 2017 Pohang Earthquake Sequences Using Coda‐Based Methods

Gyeongdon Chai, Seung‐Hoon Yoo, Junkee Rhie, Tae‐Seob Kang
Published: 18 August 2020
Bulletin of the Seismological Society of America (2020) 110 (5): 2047–2057.
DOI: https://doi.org/10.1785/0120200132
... methods and Bayesian inversion. The 2016 Gyeongju earthquake sequence is a typical earthquake sequence generated by tectonic processes. In contrast, the 2017 Pohang earthquake sequence is believed to be related to fluid injections conducted for the development of enhanced geothermal systems. As the two...
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Aftershock Sequence and Statistics of the 2017 M w 5.5 Pohang, South Korea, Earthquake: Implications of Fault Heterogeneity and Postseismic Relaxation

Jeong‐Ung Woo, Minook Kim, Junkee Rhie, Tae‐Seob Kang
Published: 04 August 2020
Bulletin of the Seismological Society of America (2020) 110 (5): 2031–2046.
DOI: https://doi.org/10.1785/0120200059
... understanding of the spatial distribution and magnitude of these factors, as well as provide seismic hazard assessment. The 2017 M w 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...
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Dynamic Fault Interaction during a Fluid‐Injection‐Induced Earthquake: The 2017 M w 5.5 Pohang Event

Kadek Hendrawan Palgunadi, Alice‐Agnes Gabriel, Thomas Ulrich, José Ángel López‐Comino, Paul Martin Mai
Published: 04 August 2020
Bulletin of the Seismological Society of America (2020) 110 (5): 2328–2349.
DOI: https://doi.org/10.1785/0120200106
...Kadek Hendrawan Palgunadi; Alice‐Agnes Gabriel; Thomas Ulrich; José Ángel López‐Comino; Paul Martin Mai ABSTRACT The 15 November 2017 M w 5.5 Pohang, South Korea, earthquake has been linked to hydraulic stimulation and fluid injections, making it the largest induced seismic event associated...
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Journal Article

Ground‐Motion Amplifications in Small‐Size Hills: Case Study of Gokgang‐ri, South Korea, during the 2017 M L 5.4 Pohang Earthquake Sequence

Sinhang Kang, Byungmin Kim, Hyungik Cho, Junyoung Lee, Kiseog Kim, Sungjin Bae, Chang‐Guk Sun
Published: 22 October 2019
Bulletin of the Seismological Society of America (2019) 109 (6): 2626–2643.
DOI: https://doi.org/10.1785/0120190064
...Sinhang Kang; Byungmin Kim; Hyungik Cho; Junyoung Lee; Kiseog Kim; Sungjin Bae; Chang‐Guk Sun Abstract An earthquake with a local magnitude ( M L ) of 5.4 occurred in Pohang city, South Korea, on 15 November 2017. This study focuses on the damage that affected the village of Gokgang‐ri, which...
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Surface Deformations and Rupture Processes Associated with the 2017 M w 5.4 Pohang, Korea, Earthquake

Jin‐Hyuck Choi, Kyoungtae Ko, Yong Sik Gihm, Chang Soo Cho, Hoonyol Lee, Seok Goo Song, Eun‐Seok Bang, Hong‐Jin Lee, Han‐Kyung Bae, Sung Won Kim, Sung‐Ja Choi, Sung Soon Lee, Seung Ryeol Lee
Published: 12 February 2019
Bulletin of the Seismological Society of America (2019) 109 (2): 756–769.
DOI: https://doi.org/10.1785/0120180167
...Jin‐Hyuck Choi; Kyoungtae Ko; Yong Sik Gihm; Chang Soo Cho; Hoonyol Lee; Seok Goo Song; Eun‐Seok Bang; Hong‐Jin Lee; Han‐Kyung Bae; Sung Won Kim; Sung‐Ja Choi; Sung Soon Lee; Seung Ryeol Lee Abstract In November 2017, an M w 5.4 earthquake with a shallow ( ∼ 4 km ) hypocenter occurred in the Pohang...
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Static Slip Model of the 2017 M w 5.4 Pohang, South Korea, Earthquake Constrained by the InSAR Data

Seok Goo Song, Hoonyol Lee
Published: 21 November 2018
Seismological Research Letters (2019) 90 (1): 140–148.
DOI: https://doi.org/10.1785/0220180156
...Seok Goo Song; Hoonyol Lee ABSTRACT An M w 5.4 earthquake occurred in the city of Pohang in the southeastern part of the Korean Peninsula on 15 November 2017. It was a moderate‐sized crustal event but triggered enormous attention from the Korean public because strong shaking was felt over the whole...
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Shear failure of a captive column during the <span class="search-highlight">2017</span> <span class="search-highlight">Pohang</span> <span class="search-highlight">earthquake</span> in Kore...

Shear failure of a captive column during the 2017 Pohang earthquake in Kore...

Published: 01 May 2020
Figure 1. Shear failure of a captive column during the 2017 Pohang earthquake in Korea (M = 5.4).
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Map of surface deformations associated with the <span class="search-highlight">2017</span> <span class="search-highlight">Pohang</span> <span class="search-highlight">earthquake</span> sequ...

Map of surface deformations associated with the 2017 Pohang earthquake sequ...

Published: 12 February 2019
Figure 3. Map of surface deformations associated with the 2017 Pohang earthquake sequence. Deformational features and secondary effects of the earthquake include sand blows, ground cracks, rice paddy failures, rockfalls, and landfill slides. (Inset a) Orientations of sand blows (adapted from
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Examples of sand blows associated with the <span class="search-highlight">2017</span> <span class="search-highlight">Pohang</span> <span class="search-highlight">earthquake</span>. (a) A co...

Examples of sand blows associated with the 2017 Pohang earthquake. (a) A co...

Published: 12 February 2019
Figure 4. Examples of sand blows associated with the 2017 Pohang earthquake. (a) A conjugate system of sand blows on rice fields identified by unmanned aerial vehicle (UAV)‐derived images (ground resolution of ∼ 2    cm ). (b,c) Field photos showing sand blows erupted through ground
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Photographs of ground cracks induced by the <span class="search-highlight">2017</span> <span class="search-highlight">Pohang</span> <span class="search-highlight">earthquake</span> (locatio...

Photographs of ground cracks induced by the 2017 Pohang earthquake (locatio...

Published: 12 February 2019
Figure 5. Photographs of ground cracks induced by the 2017 Pohang earthquake (locations of each photograph shown in Fig.  3 ): (a,b) block jointing in bedrocks and (b) its related rockfalls. En echelon cracks on the dirt of (c) on a playground, (d,e) along a road, and (f) across a paved road
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3D images of rice paddies deformed by the <span class="search-highlight">2017</span> <span class="search-highlight">Pohang</span> <span class="search-highlight">earthquake</span>. (a) A str...

3D images of rice paddies deformed by the 2017 Pohang earthquake. (a) A str...

Published: 12 February 2019
Figure 6. 3D images of rice paddies deformed by the 2017 Pohang earthquake. (a) A structural pattern similar to mole tracks indicating a potential lateral component of motion during uplift. (b) A digital elevation model produced by Photoscan displaying about a half‐meter of uplift across a pop‐up
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(a) An example of landfill failure induced by the <span class="search-highlight">2017</span> <span class="search-highlight">Pohang</span> <span class="search-highlight">earthquake</span>, i...

(a) An example of landfill failure induced by the 2017 Pohang earthquake, i...

Published: 12 February 2019
Figure 8. (a) An example of landfill failure induced by the 2017 Pohang earthquake, imaged by UAV‐derived photography. (b) Compressional features (unfilled white arrows) such as folded ground on a tilted rice paddy and extensional cracks (filled black arrows) in the northwestern side
Journal Article

Triggering of the Pohang, Korea, Earthquake ( M w 5.5) by Enhanced Geothermal System Stimulation

William L. Ellsworth, Domenico Giardini, John Townend, Shemin Ge, Toshihiko Shimamoto
Published: 07 August 2019
Seismological Research Letters (2019) 90 (5): 1844–1858.
DOI: https://doi.org/10.1785/0220190102
...William L. Ellsworth; Domenico Giardini; John Townend; Shemin Ge; Toshihiko Shimamoto ABSTRACT On the afternoon of 15 November 2017, the coastal city of Pohang, Korea, was rocked by a magnitude 5.5 earthquake ( M w , U.S. Geological Survey). Questions soon arose about the possible involvement...
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Shear-wave velocity map for Pohang Basin, South Korea, based on the P-wave seismogram method

Junyoung Lee, Kwang-Hee Kim, Su Young Kang, Moon Son, Byungmin Kim, M.EERI
Published: 01 August 2022
Earthquake Spectra (2022) 38 (3): 2162–2182.
DOI: https://doi.org/10.1177/87552930221076532
...Junyoung Lee; Kwang-Hee Kim; Su Young Kang; Moon Son; Byungmin Kim, M.EERI The 2017 M L 5.4 Pohang, South Korea earthquake, which caused severe damage, raised attention to the importance of the characterization of the Pohang Basin structure and the identification of active faults. We utilize 366...
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Improved Injection Schedules of CO 2 for Pohang Basin, Yeongil Bay, South Korea: Regarding Field Security and Injection Effectiveness

Dogyun Kim, Doeon Kim, Woosueng Jo, Jonggeun Choe, Honggeun Jo
Journal: Lithosphere
Publisher: GSW
Published: 15 November 2024
Lithosphere (2024) 2024 (4): lithosphere_2024_176.
DOI: https://doi.org/10.2113/2024/lithosphere_2024_176
... efficiency to ensuring safety of carbon dioxide (CO 2 ) storage after the Pohang earthquake occurrence in 2017. In this research, we present a stepwise CO 2 injection scenario, which gradually increases injection rate during early stage of CO 2 injection period. Furthermore, we conduct sensitivity analyses...
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Numerical prediction of settlement due to the Pohang earthquake

Sung-Sik Park, Nhat-Phi Doan, Zhenzhen Nong
Published: 01 May 2021
Earthquake Spectra (2021) 37 (2): 652–685.
DOI: https://doi.org/10.1177/8755293020957345
...Sung-Sik Park; Nhat-Phi Doan; Zhenzhen Nong On 15 November 2017, an earthquake with a magnitude of 5.4 caused geotechnical damage over a wide area of Pohang, South Korea. In this study, the UBCSAND constitutive effective stress model is calibrated by cyclic direct simple shear (CDSS) tests...
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Crustal stress buildup/relaxation and pore pressure in preparation and sequential brittle-shear fault rupture — Implications for a general theory of earthquake nucleation

Clay Kurison
Journal: Interpretation
Published: 25 July 2024
Interpretation (2024) 12 (3): SD37–SD75.
DOI: https://doi.org/10.1190/INT-2023-0007.1
... of induced seismicity (2016 M w 5.1 Fairview earthquake, Oklahoma, USA and 2017 M w 5.5 Pohang earthquake, South Korea) and multiple cases of natural seismicity in different environments. STRATA was found to be consistent with the associated triggering mechanisms...
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Assessing Potential Seismic Hazard in Enhanced Geothermal Systems: Insights from Comparing Gonghe and Pohang Reservoirs

Supeng Zhang, Yinlin Ji, Hannes Hofmann, Frédéric Cappa, Shouding Li
Published: 27 September 2024
Seismological Research Letters (2024)
DOI: https://doi.org/10.1785/0220240245
... is available only in the electronic edition. In Pohang, the WCEPs of earthquakes generally exhibit a continuous increase during hydraulic stimulations, with slight fluctuations, whereas the EPs show an increase before 18 May 2017, followed by a sharp decrease (Fig.  6b ) due to the reduction in the real...
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