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ASTER and field observations of the 24 December 2006 eruption of Bezymianny Volcano, Russia

Carter A.J., Girina O.A. ORCID logoORCID: https://orcid.org/0000-0003-4918-2338, Ramsey M.S., Demyanchuk Yu.V. (2008) ASTER and field observations of the 24 December 2006 eruption of Bezymianny Volcano, Russia // Remote Sensing of Environment. Iss. 112. pp. 2569-2577. doi: 10.1016/j.rse.2007.12.001.

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Аннотация

An explosive eruption occurred at Bezymianny Volcano (Kamchatka Peninsula, Russia) on 24 December 2006 at 09:17 (UTC). Seismicity increased three weeks prior to the large eruption, which produced a 12–15 km above sea level (ASL) ash column. We present field observations from 27 December 2006 and 2 March 2007, combined with satellite data collected from 8 October 2006 to 11 April 2007 by the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER), as part of the instrument's rapid-response program to volcanic eruptions. Pixel-integrated brightness temperatures were calculated from both ASTER 90 m/pixel thermal infrared (TIR) data as well as 30 m/pixel shortwave infrared (SWIR) data. Four days prior to the eruption, the maximum TIR temperature was 45 °C above the average background temperature (−33 °C) at the dome, which we interpret was a precursory signal, and had dropped to 8 °C above background by 18 March 2007. On 20 December 2006, there was also a clear thermal signal in the SWIR data of 128 °C using ASTER Band 7 (2.26 μm). The maximum SWIR temperature was 181 °C on the lava dome on 4 January 2007, decreasing below the detection limit of the SWIR data by 11 April 2007. On 4 January 2007 a hot linear feature was observed at the dome in the SWIR data, which produced a maximum temperature of 700 °C for the hot fraction of the pixel using the dual band technique. This suggests that magmatic temperatures were present at the dome at this time, consistent with the emplacement of a new lava lobe following the eruption. The eruption also produced a large, 6.5 km long by up to 425 m wide pyroclastic flow (PF) deposit that was channelled into a valley to the south–southeast. The PF deposit cooled over the following three months but remained elevated above the average background temperature. A second field investigation in March 2007 revealed a still-warm PF deposit that contained fumaroles. It was also observed that the upper dome morphology had changed in the past year, with a new lava lobe having in-filled the crater that formed following the 9 May 2006 eruption. These data provide further information on effusive and explosive activity at Bezymianny using quantitative remote sensing data and reinforced by field observations to assist in pre-eruption detection as well as post-eruption monitoring.
Тип объекта: Статья
Название: ASTER and field observations of the 24 December 2006 eruption of Bezymianny Volcano, Russia
Язык: English
Издание: Remote Sensing of Environment
Тематика: 3 ГРНТИ - Государственный рубрикатор научно-технической информации > 38 ГЕОЛОГИЯ > 38.37 Петрография > 38.37.25 Вулканология
1 Вулканы > 1.1 Вулканы Курило-Камчатского региона > 1.1.1 Камчатка > Безымянный
Разместивший пользователь: к.г.-.м.н. О.А. Гирина
Дата размещения: 15 Мар 2013 04:39
Последнее изменение: 13 Май 2020 10:02
URI: http://repo.kscnet.ru/id/eprint/215

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