• 대한원격탐사학회지
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• 제40권3호
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• pp.307-316
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• 2024

2024년 1월 1일 일본 노토반도에서 모멘트 규모 7.5의 강진이 발생했다. 이 강진에 의해 노토반도에는 심각한 지표 변위가 발생하였다. 지표 변위 파악에는 global navigation satellite system (GNSS) 기지국에서 측정된 자료를 사용하나 기지국이 존재하지 않는 지역의 정보를 획득하기에는 한계점이 존재한다. 따라서 본 연구에서는 급격하게 발생한 변위를 탐지할 수 있는 offset tracking을 이용하여 노토반도 전역의 수평 지표 변위를 파악하고자 한다. Offset tracking 기법을 이용하여 노토반도를 분석한 결과 진앙이 위치한 노토반도의 북동쪽 지역보다 북서쪽 지역에서 더 많은 수평 방향 지표 변위가 발생하였으며 지표 변위 값이 최대 2.9 m에 달하는 것으로 나타났다. 본 연구의 결과는 지상 GNSS 기지국을 통해 지표 변위 자료를 획득하지 못하는 지역의 지표 변위 값을 산출하는 데 활용할 수 있을 것이다.

• 한국방재학회:학술대회논문집
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• 한국방재학회 2009년도 정기 학술발표대회
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• pp.26-35
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• 2009

Efficient recovery assistance for individual households is one of the inevitable issues in management after a disaster. Discussion on how the assistance should be provided to them, however, has been put aside whereas amount or contents of it have been disputed every time a disaster happens. Public support system in a time of disaster in Japan is very complicated because many laws are related to recovery support and each law covers just a part of total recovery needs of affected household. It is difficult to see whole picture of the system for affected households. Therefore, households must have many interactions with various sections in charge of particular assistance service to know the contents of each assistance and requirements to receive it to decide combination of supports they use. It is crucial for efficient recovery assistance operation to manage those customer relations since considerable part of troubles in individual recovery came from failure in each interactions caused by lack of common understanding on each recovery process between them. In this paper, I want to introduce how support system in Japan is fragmented, a case of Anamizu town which adopted a customer-oriented framework of information management system for their assistance operation after Mar. 2007 Noto peninsula earthquake and what was learned from the case.

• 한국지하수토양환경학회지:지하수토양환경
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• 제29권4호
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• pp.32-43
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• 2024

Recently, numerous earthquakes have caused significant casualties and property damage worldwide, including major events in 2023 (Türkiye, M7.8; Morocco, M6.8) and 2024 (Noto Peninsula, Japan, M7.6; Taiwan, M7.4). In South Korea, the frequency of detectable and noticeable earthquakes has been gradually increasing since the M5.8 Gyeongju Earthquake. Notable recent events include those in Jeju (M4.9), Goesan (M4.1), the East Sea (M4.5), and Gyeongju (M4.0) since 2020. This study, for the first time in South Korea, monitored groundwater levels and temperatures at a 1Hz frequency to observe the responses in groundwater to moderate and small earthquakes primarily occurring within the country. Between April 23, 2023, and May 22, 2023, 17 earthquakes were reported in the East Sea region with magnitudes ranging from M2.0 to M4.5. Analysis of groundwater level responses at the Gangneung observation station revealed fluctuations associated with five of these events. The 1Hz observation data clearly showed groundwater level changes even for small earthquakes, indicating that groundwater is highly sensitive to the frequent small earthquakes recently occurring in South Korea. The analysis confirmed that the maximum amplitude of groundwater level changes due to earthquakes is proportional to the earthquake's magnitude and the distance from the epicenter. These findings highlight the importance of precise 1Hz-level observations in earthquake-groundwater research. This study provides foundational data for earthquake monitoring and prediction and emphasizes the need for ongoing research into monitoring the changes in groundwater parameters (such as aquifer characteristics, quantity/quality, and contaminant migration) induced by various magnitudes of earthquakes that may occur within the country in the future.