@article{ref1,
title="A large hydrothermal reservoir beneath Taal Volcano (Philippines) revealed by magnetotelluric observations and its implications to the volcanic activity",
journal="Proceedings of the Japan Academy, series B, physical and biological sciences",
year="2013",
author="Alanis, Paul K. B. and Yamaya, Yusuke and Takeuchi, Akihiro and Sasai, Yoichi and Okada, Yoshihiro and Nagao, Toshiyasu",
volume="89",
number="8",
pages="383-389",
abstract="Taal Volcano is one of the most active volcanoes in the Philippines. The magnetotelluric 3D forward analyses indicate the existence of a large high resistivity anomaly (∼100 Ω·m) with a volume of at least 3 km × 3 km × 3 km, which is capped by a conductive layer (∼10 Ω·m), beneath the Main Crater. This high resistivity anomaly is hypothesized to be a large hydrothermal reservoir, consisting of the aggregate of interconnected cracks in rigid and dense host rocks, which are filled with hydrothermal fluids coming from a magma batch below the reservoir. The hydrothermal fluids are considered partly in gas phase and liquid phase. The presence of such a large hydrothermal reservoir and the stagnant magma below may have influences on the volcano's activity. Two possibilities are presented. First, the 30 January 1911 explosion event was a magmatic hydrothermal eruption rather than a base-surge associated with a phreato-magmatic eruption. Second, the earlier proposed four eruption series may be better interpreted by two cycles, each consisting of series of summit and flank eruptions.(Communicated by Seiya Uyeda, M.J.A.).<p /> <p>Language: en</p>",
language="en",
issn="0386-2208",
doi="",
url="http://dx.doi.org/"
}