The Study on the Possibility of Using Satellite in Monitoring Precursor of Magma Activity in the Baegdusan Volcano

Abstract

Abstract:The Baegdusan Volcano which erupted violently at 1000 AD is still have possibility of eruption. Therefore, it is necessary to monitor regularly the possibility of eruption. However, it is very difficult to install regular monitoring system or to get regularly monitored data due to geopolitic problems. This is why we have to develop regular monitoring technique using satellite. The geoid in the Baegdusan Volcanic area calculated from gravity data obtained from GRACE satellite, decreased from 2002 to 2005. The period of decreasing is well matched with time when magma activities were recognized in the Baegdusan Volcanic area. The decrease in geoid is interpreted to be caused by the decrease of water storage. Considering that the amount of rainfall from 2002 and 2005 is almost constant, the decrease in geoid may be related to the magma activity under the Baegdusan Volcano. The geomagnetic total force in the Baegdusan Volcanic area measured by CHAMP satellite, decreased from 2000 to 2005 and increased after 2005. The period of decrease is well matched with the time with increased activity of magma chamber under the Baegdusan Volcano indicating that the decrease of geomagnetic total force is caused by demagnetization of surrounding rocks due to the increase of temperature of magma chamber. These data

Analyzing the Disaster Vulnerability of Mt. Baekdusan Area Using Terrain Factors

“…그러므로 백두산 에 관련된 연구는 과거에는 화산학적 접근으로의 분 석 (Yun et al, 1993;Soh and Yun, 1999)에 대한 결 과가 주를 이루었으며, 최근 백두산 분화와 관련된 여러 가지 자료를 통해 분화 가능성이 논의되자 과 거 역사 시대 분화 기록에 대한 선행연구에 관련된 분석 (Yun and Cui, 1996;Park and Lim, 2010;Yun and Lee, 2011;Machida et al, 1981;1990) 및 분화 전조현상에 관련된 분석 (Xu et al, 2012;KMA, 2011;Un et al, 2013)이 주를 이루고 있다. 특히 접 근이 용이하지 않은 점을 고려하여 백두산에 대한 인공위성을 이용한 예측이 진행되고 있으며, 인공위 성에 의하여 측정된 중력 및 지오이드 자료를 이용 하여 백두산 하부의 마그마 챔버에 대한 연구 Lee et al, 2013) …”