Vol. 29, issue 12, article # 10

Abstract:

The paper presents the study of atomic oxygen [OI] 557.7 nm atmospheric emission (airglow heights of 85–115 km) during earthquakes (EQ) with a magnitude of M ³ 5 in the Baikal rift zone during 2014–2016. The analysis of variations in OI 557.7 nm atmospheric emission during the recorded EQs is carried out; it revealed higher values of average nocturnal intensities of this emission within several days before an EQ in comparison with subsequent days. The amplitude of the variations in average nocturnal values of 557.7 nm emission from maximum before an EQ to minimum in subsequent days is 40–60% on the average and can reach ³ 100–200% for some events. The analysis of possible mechanisms of the variations in 557.7 nm emission during EQs can be associated with the sources directly contributing to EQ preparation and with the dynamics of the lower atmosphere independently affecting seismic activity and the upper atmosphere. The latter leads to a correlation between these processes not connected by cause F-effect relations.

Keywords:

earthquake, airglow, 557.7 nm emission

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