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Heningtiyas, Hesti
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Earth & Planetary Sciences Education

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Potensi Radar Cuaca dalam Pengamatan Aktivitas Gunung Berapi (Studi Kasus Letusan Gunung Lewotobi Laki-laki 8 November 2024) Heningtiyas, Hesti; Supriyadi, Asep Adang; Arief, Syachrul

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Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/joe.v7i2.8394

Abstract

The characteristics of ash volcanoes can be detected using weather radar by analyzing volcanic ash clouds. Weather radar reflectivity data can describe the estimated height of the column of volcanic ash cloud and the trajectory or direction of the eruption cloud. The BMKG's C-band single-polarization weather radar at Maumere Meteorological Station observed several eruptions of Mount Lewotobi Laki-Laki. Mount Lewotobi Laki-Laki is about 60 km from Maumere Weather Radar, which is still included in the radar coverage. From several eruption events, the eruption activity on 8 November 2024 of Mount Lewotobi Laki-Laki could be observed from the Maumere Weather Radar. The radar data processing produces Maximum (MAX) and VCUT (Vertical Cut) products to obtain information on the height of volcanic eruptions and eruption characteristics in more detail. The MAX and VCUT products of weather radar on the eruption event in this study show that the height of the column of volcanic ash cloud observed by weather radar is higher than the direct observation report by PVMBG.
Measuring the Height of Volcanic Clouds Using Weather Radar : Case Study Mount Sinabung Eruptions in Medan, Indonesia Heningtiyas, Hesti; Achmadi, Budhi; Supriyadi, Asep Adang; Arief, Syachrul; Charolydya, Rindita
Indonesian Journal of Geography Vol 57, No 2 (2025): Indonesian Journal of Geography
Publisher : Faculty of Geography, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijg.96391

Abstract

Apart from being used to observe hydrometeorological phenomena, weather radar can also be used to observe volcanic eruptions. Weather radar reflectivity data can describe the estimated height of volcanic eruptions, while the HYSPLIT (Hybrid Single-Particle Lagrangian Integrated Trajectory) model describes the trajectory or direction of distribution of eruption clouds. BMKG's single polarization C-Band weather radar at the Regional Office I in Medan was able to observe several eruptions of Mount Sinabung. Mount Sinabung is about 50 km from the Medan Weather Radar hence is still within radar coverage. Several eruptive activities of Mount Sinabung can be observed from the Medan Weather Radar, using Maximum (MAX) and VCUT (Vertical Cut) products to obtain information on the height of volcanic eruptions and eruption characteristics. While, the HYSPLIT model developed by ARL-NOAA is used to determine the direction of distribution of volcanic ash immediately after the eruption. The MAX and VCUT weather radar products and the results of NOAA HYSPLIT model for several events in this study show that the eruption height in weather radar observations is higher than the HYSPLIT model and the direction of volcanic ash distribution is different from Volcanic Observatory Notice for Aviation (VONA) observations.Received: 2024-05-24 Revised: 2025-06-26 Accepted: 2025-08-15Published: 2025-08-19  
Co-Authors Achmadi, Budhi Arief, Syachrul Charolydya, Rindita Supriyadi, Asep Adang