Wed. May 28, 2025 10:45 AM - 12:15 PM Convention Hall (CH-B) (International Conference Hall, Makuhari Messe)

[E] Oral
| S (Solid Earth Sciences )
| S-VC Volcanology

[S-VC30] International Volcanology

11:30 AM - 11:45 AM

[SVC30-10] Multiple Eruptions and Magma Types of The Old Ijen Caldera Forming Eruption: Insight from Stratigraphy and Petrological Characteristics of Ignimbrite

*Sherinna Mega Cahyani¹, Tsukasa Ohba¹, Takashi Hoshide¹, Mradipta Lintang Alifcanta Moktikanana¹ (1.Department of Earth Resource Science, Graduate School of International Resource Sciences, Akita University)

11:45 AM - 12:00 PM

[SVC30-11] Melt extraction from crystal mush leading to the 1593 explosive basaltic andesite eruption of Raung volcano, Indonesia: a preliminary study

*Mradipta Lintang Alifcanta Moktikanana¹, Tsukasa Ohba¹, Takashi Hoshide¹ (1.Graduate School of International Resource Sciences, Akita University)

Wed. May 28, 2025 5:15 PM - 7:15 PM Poster Hall (Exhibition Hall 7&8, Makuhari Messe)

[E] Poster
| S (Solid Earth Sciences )
| S-VC Volcanology

[S-VC30] International Volcanology

5:15 PM - 7:15 PM

[SVC30-P03] Temporal Variation of Eruption Mechanisms at Bromo Volcano: Insights from Componentry and Petrological Analysis

*Aisyah Qurrataaini¹, Tsukasa Ohba¹, Jananda Nuralam Indriyanto², Takashi Hoshide¹ (1.Akita University, 2.Institut Teknologi Bandung)

5:15 PM - 7:15 PM

[SVC30-P04] Explosive Dynamics of the 45 ka Sandsea Caldera-Forming Eruption, Tengger Volcanic Complex (TVC): Insight from Grain Size Distribution, Componentry, and Textural Analysis

*Andhika Nugraha¹, Tsukasa Ohba¹, Takashi Hoshide¹, Indranova Suhendro^2,3, Muhammad Andriansyah Gurusinga^4,5, Gabriela Nogo Retnaningtyas Bunga Naen⁴ (1.Petrology and Volcanology Laboratory, Graduate School of International Resource Sciences, Akita University, 2.Department of Environmental Geography, Faculty of Geography, Universitas Gadjah Mada, 3.Center for Disaster Studies, Universitas Gadjah Mada, 4.Center for Regional Revitalization in Research and Education, Akita University, 5.Department of Geological Engineering, Faculty of Mineral Technology, Universitas Pembangunan Nasional “Veteran” Yogyakarta)

Mon. May 26, 2025 5:15 PM - 7:15 PM Poster Hall (Exhibition Hall 7&8, Makuhari Messe)

[J] Poster
| S (Solid Earth Sciences )
| S-VC Volcanology

[S-VC33] Mechanism of volcanic eruptions

5:15 PM - 7:15 PM

[SVC33-P03] Petrological characteristics of Tsumakoi-touge lava, Kampu volcano

*Yohei Koike¹, Tsukasa Ohba¹ (1.Akita university)

Tue. May 27, 2025 1:45 PM - 3:15 PM Convention Hall (CH-B) (International Conference Hall, Makuhari Messe)

[J] Oral
| S (Solid Earth Sciences )
| S-VC Volcanology

[S-VC34] Volcanic and igneous activities, and these long-term forecasting

2:15 PM - 2:30 PM

[SVC34-03] Explosive eruption record since 10 ka from tephrostratigraphy of Chokai volcano.

*Sota Kosuga¹, Tsukasa Ohba¹, Masao Ban², Takumi Imura² (1.Akita University, 2.Yamagata University)

Tue. May 27, 2025 5:15 PM - 7:15 PM Poster Hall (Exhibition Hall 7&8, Makuhari Messe)

[J] Poster
| S (Solid Earth Sciences )
| S-VC Volcanology

[S-VC34] Volcanic and igneous activities, and these long-term forecasting

5:15 PM - 7:15 PM

[SVC34-P11] Sequence of Zao Volcano 17th century eruptions based on geologic and petrologic features of volcanic ashes.

*Keia Yamanada¹, Masao Ban¹, Takumi Imura¹, Tsukasa Ohba² (1.Faculty of Science, Yamagata University, 2.Faculty of International Resource Sciences, Akita University)

5:15 PM - 7:15 PM

[SVC34-P18] Mineralogical Characteristics of Volcanic Ash during the 2019-2020 Eruptions of Aso Volcano

*AOI HIRATA¹, Tsukasa Ohba¹, Yasuo Miyabuchi² (1.Graduate School of International Resource Sciences, Akita university, 2.Center for Water Cycle, Marine Environment and Disaster Management, Kumamoto University)

Sun. May 25, 2025 5:15 PM - 7:15 PM Poster Hall (Exhibition Hall 7&8, Makuhari Messe)

[J] Poster
| S (Solid Earth Sciences )
| S-VC Volcanology

[S-VC35] Hydrothermal systems of volcanoes

5:15 PM - 7:15 PM

[SVC35-P04] Geochemical interaction between rocks and volcanic fluid in the hydrothermal system at Kurikoma volcano, northern Honshu

*Hinako Toda¹, Tsukasa Ohba², Ryohei Takahashi², Kazuhiro Amita³, Pearlyn Manalo² (1.Akita university, 2.Graduate School of International Resource Sciences, Akita University, 3.Faculty of Engineering Science, Department of Systems Design Engineering, Civil and Environmental Engineering Course, Akita University)

Mon. May 26, 2025 5:15 PM - 7:15 PM Poster Hall (Exhibition Hall 7&8, Makuhari Messe)

[E] Poster
| S (Solid Earth Sciences )
| S-CG Complex & General

[S-CG51] Hard-Rock Drilling Science: Continental and Deep-Sea Drilling, and Ophiolite

5:15 PM - 7:15 PM

[SCG51-P05] Heterogeneity of Plutonic Rocks in the Sodong Parat Peninsula, Ciletuh Mélange, Indonesia

*Rinaldi Ikhram¹, Takashi Hoshide¹, Tsukasa Ohba¹, Mega Fatimah Rosana², Adi Hardiyono² (1.Faculty of International Resource Science, Akita University, 2.Faculty of Geological Engineering, Padjadjaran University)

Tsukasa Ohba

Speaker, Author, Co-Author