A5101581113- Seismic Waves and Analysis
- Seismic Imaging and Inversion Techniques
- earthquake and tectonic studies
- High-pressure geophysics and materials
- Structural Health Monitoring Techniques
- Cryospheric studies and observations
- Seismic Performance and Analysis
- Underwater Acoustics Research
- Seismology and Earthquake Studies
- Landslides and related hazards
- Arctic and Antarctic ice dynamics
- Methane Hydrates and Related Phenomena
- Geological and Geochemical Analysis
- Polar Research and Ecology
- Geology and Paleoclimatology Research
- HVDC Systems and Fault Protection
- High-Voltage Power Transmission Systems
- Power Systems Fault Detection
- Flood Risk Assessment and Management
- Oceanographic and Atmospheric Processes
- Photonic and Optical Devices
- Nanowire Synthesis and Applications
- Marine and Coastal Research
- Advanced MEMS and NEMS Technologies
- Ocean Waves and Remote Sensing
Pukyong National University
2023-2025
Institut des Géosciences de l'Environnement
2023
Korea Polar Research Institute
2012-2015
Kookmin University
2011
Electronics and Telecommunications Research Institute
1997
ABSTRACT We estimated source parameters, such as corner frequency (fc), stress drop (Δσ), and seismic moment (M0) for the 2019 Ridgecrest earthquake sequence in southern California. Source spectra used to estimate parameters were corrected with site decay parameter (κ0) along geometrical spreading inelastic attenuation. The dataset consisting of 12,943 events from sequence, distributed by Community Stress Drop Validation Study Southern California Earthquake Center, offers opportunities...
A new method for dry etching of silicon dioxide surface micromachining is presented to obtain very compliant polysilicon microstructures with negligible stiction problem and greatly simplify the overall releasing procedure as well. By sacrificial hydrofluoric acid (HF) vapor instead conventional aqueous HF solution, need subsequent rinsing an elaborate drying eliminated. Condensation water on etch first identified cause that prevented success release in past. Use anhydrous HF/CH/sub 3/OH...
Upper-mantle structure between 100 and 300 km depth below the northern Antarctic Peninsula is imaged by modelling P-wave traveltime residuals from teleseismic events recorded on King Sejong Station (KSJ), Argentinean/Italian stations (JUBA ESPZ), an IRIS/GSN (PMSA) Seismic Experiment in Patagonia Antarctica (SEPA) broad-band stations. For measuring residuals, we applied a multichannel cross-correlation method inverted for upper-mantle using VanDecar's method. The new 3-D velocity model...
Research Article| October 01, 2014 Deployment and Performance of a Broadband Seismic Network near the New Korean Jang Bogo Station, Terra Nova Bay, East Antarctica Yongcheol Park; Park Korea Polar Institute, 26 Songdomirae‐ro, Yeonsu‐gu, Incheon 406‐840, Koreaypark@kopri.re.kr Search for other works by this author on: GSW Google Scholar Hyun Jae Yoo; Yoo Won Sang Lee; Lee Joohan Yeadong Kim; Kim Sang‐Hyun Dongseob Shin; Shin Hadong Author Article Information Publisher: Seismological Society...
중력계는 주로 지하 광물자원 탐사 및 지구조석과 같은 장주기 이벤트를 관측하는데 사용되고 있다. 최근 연구자들은 이 중력계를 이용하여 대형 원거리 지진 지진상시잡음 관측과 몇몇 새롭고 흥미로운 사실들을 발견하였다. Micro-g LaCoste사의 gPhone에 적용된 zero-length spring suspension 기술은 초저주파 신호도 훌륭히 관측 가능하게 하며, 이는 Earth's hum이나 심지어 지진해일 등을 큰 도움을 줄 수 있음을 시사한다. 연구에서는 충남 금산에서 2008년 11월 부터 2009년 7월까지 9개월간 임시로 설치/운영하였던 gPhone 자료를 분석하여 지진관측 상시지진잡음의 계절적 변화에 관한 사전결과를 보고하고자 한다. A gravity meter has been used for exploring subsurface mineral resources and monitoring long-period events such as Earth...
<p>Surface wave dispersion is one of the essential means to study structure Earth’s crust and upper mantle. However, complicated structures surface cause multipathing effects that make accurate phase measurement difficult. In this study, teleseismic Rayleigh-wave tomography was performed estimate crustal velocity southern part Korean Peninsula using differences between station pairs in a dense array instead absolute arrival times amplitudes. order change across...
Site effects caused by unconsolidated sediments laying on the bedrock amplify or attenuate ground motions propagated to surface. effect is unique site-by-site, and thus, makes analyzing actual attenuation characteristics of difficult. In southern Korean Peninsula, 17 seismic stations administered KMA KIGAM were equipped with a pair accelerometers; one installed at surface, other borehole (namely SB station). We estimate site response functions using ambient noise data. First,...