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Investigation of Ionospheric Response to June 2009 Sarychev Peak Volcano Eruption
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| Title: | Investigation of Ionospheric Response to June 2009 Sarychev Peak Volcano Eruption |
| Authors: | Shestakov, Nikolay Browse this author | | Orlyakovskiy, Alexander Browse this author | | Perevalova, Natalia Browse this author | | Titkov, Nikolay Browse this author | | Chebrov, Danila Browse this author | | Ohzono, Mako Browse this author | | Takahashi, Hiroaki Browse this author →KAKEN DB |
| Keywords: | volcanic eruption | | explosion | | GNSS ionosphere sounding | | covolcanic ionospheric disturbances |
| Issue Date: | Feb-2021 |
| Publisher: | MDPI |
| Journal Title: | Remote Sensing |
| Volume: | 13 |
| Issue: | 4 |
| Start Page: | 638 |
| Publisher DOI: | 10.3390/rs13040638 |
| Abstract: | Global Navigation Satellite Systems have been extensively used to investigate the ionosphere response to various natural and man-made phenomena for the last three decades. However, ionospheric reaction to volcano eruptions is still insufficiently studied and understood. In this work we analyzed the ionospheric response to the 11-16 June 2009 VEI class 4 Sarychev Peak volcano eruption by using surrounding Russian and Japanese GPS networks. Prominent covolcanictotal electron content (TEC)ionospheric disturbances (CVIDs) with amplitudes and periods ranged between 0.03-0.15 TECU and 2.5-4.5 min were discovered for the three eruptive events occurred at 18:51 UT, 14 June; at 01:15 and 09:18 UT, 15 June 2009. The estimates of apparent CVIDs velocities vary within 700-1000 m/s in the far-field zone (300-900 km to the southwest from the volcano) and 1300-1800 m/s in close proximity toSarychev Peak. The characteristics of the observed TEC variations allow us to attribute them to acoustic mode. The south-southwestward direction is preferred for CVIDs propagation. We concluded that the ionospheric response to a volcano eruption is mainly determined by a ratio between explosion strength and background ionization level. Some evidence of secondary (F2-layer) CVIDs' source eccentric location were obtained. |
| Rights: | http://creativecommons.org/licenses/by/4.0/ |
| Type: | article |
| URI: | http://hdl.handle.net/2115/81040 |
| Appears in Collections: | 理学院・理学研究院 (Graduate School of Science / Faculty of Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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