17:15 〜 18:45
[MIS13-P01] Volcanic Lightning: Exploring the Correlation Between Volcanic Eruption, Lightning, and Transient Luminous Events (TLEs)
キーワード：Volcanic Lightning, Transient Luminous Events (TLEs), World-Wide Lightning Location Network (WWLLN), Global Volcanism Program (GVP)
Volcanic activities are the most general and devastating natural phenomena on Earth. Previous research and media evidence has shown that severe volcanic eruptions are usually accompanied by volcanic lightning. However, it is limited to understanding the volcanic electrification mechanism in nature because of the infrequent occurrence of explosive volcanic eruptions. Volcanic lightning is relatively rare in the natural world, accounting for less than 0.01% of all lightning events. Hence, this research has compiled all lightning events associated with volcanic eruptions from 2009 to 2022, utilizing a lightning dataset provided by the World Wide Lightning Location Network. (WWLLN) and a volcano list compiled by the Global Volcanism Program (GVP) at the Smithsonian Institution. Conduct a systematic analysis of the nature of volcanic lightning using a large dataset of volcanic lightning occurrences.
According to the GVP, there were 525 volcanic eruption events from 174 different volcanoes worldwide during the period, but only 287 out of the volcanic eruption events that occurred in 123 volcanoes showed evidence of volcanic lightning. Volcanic eruptions can be classified into several subsets based on volcano type, explosivity, latitude, and volcano elevation. This study indicates that specific conditions, such as the type of hydromagmatic eruptions involving interaction between magma and external water, are more conducive to triggering volcanic lightning. Besides, a positive correlation between the Volcanic Explosivity Index (VEI) and the occurrence rate of volcanic lightning can be confirmed in this study.
Transient Luminous Events (TLEs) are distinctive discharge phenomena in the upper atmosphere. Existing research has demonstrated a significant correlation between TLEs and lightning over the past two decades. In this study, the TLEs dataset provided by the Imager of Sprite and Upper Atmospheric Lightning (ISUAL) instrument onboard the FORMOSAT-2 satellite will examine the association between TLEs and volcanic lightning. This investigation determines whether volcanic lightning, similar to tropospheric lightning, can impact the upper atmosphere through electromagnetic pulses or quasi-electrostatic field variations. This study found that 186 TLEs might be related to volcanic lightning, including ELVES, Sprite, Halo, and Blue Jet, indicating that volcanic eruptions can impact the global electric circuit by volcanic lightning.
According to the GVP, there were 525 volcanic eruption events from 174 different volcanoes worldwide during the period, but only 287 out of the volcanic eruption events that occurred in 123 volcanoes showed evidence of volcanic lightning. Volcanic eruptions can be classified into several subsets based on volcano type, explosivity, latitude, and volcano elevation. This study indicates that specific conditions, such as the type of hydromagmatic eruptions involving interaction between magma and external water, are more conducive to triggering volcanic lightning. Besides, a positive correlation between the Volcanic Explosivity Index (VEI) and the occurrence rate of volcanic lightning can be confirmed in this study.
Transient Luminous Events (TLEs) are distinctive discharge phenomena in the upper atmosphere. Existing research has demonstrated a significant correlation between TLEs and lightning over the past two decades. In this study, the TLEs dataset provided by the Imager of Sprite and Upper Atmospheric Lightning (ISUAL) instrument onboard the FORMOSAT-2 satellite will examine the association between TLEs and volcanic lightning. This investigation determines whether volcanic lightning, similar to tropospheric lightning, can impact the upper atmosphere through electromagnetic pulses or quasi-electrostatic field variations. This study found that 186 TLEs might be related to volcanic lightning, including ELVES, Sprite, Halo, and Blue Jet, indicating that volcanic eruptions can impact the global electric circuit by volcanic lightning.