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Abstract

Summary

Increased long-wave thermal emissions is found out prior to many strong earthquakes. Within the wide Balkans, however, there are a few recent strong earthquakes (EQs), so our analysis is aimed to test the hypothesis for the pre-EQ generation of near surface thermal anomalies, for EQs with magnitude 4 or greater. 1872 events have been selected from the EMSC catalogue of earthquakes, occurred in magnetically quiet periods, during the time interval 2004–2014. The selected area for investigations covers the region with coordinates: 80–300E longitude and 350–530N latitude. Besides temperature, the near tropopause ozone and water vapour are also analysed.

Statistical analyses, based on the ANOVA F-test of variances, and the t-test of mean values, reveals that the suggested pre-EQ influence of the tectonic processes is stronger and most significant on the near tropopause ozone density. This influence is still traceable in the air temperature at 2m above the surface, and notably reduced in the soil temperature at ~3m beneath the surface. This result is suggestive that the pre-EQ anomalies in the lower stratospheric ozone density are projected on the surface temperature, due to modulation of the upper tropospheric water vapour greenhouse power.

© EAGE Publications BV
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/content/papers/10.3997/2214-4609.201902657
2019-09-18
2024-04-16

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http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609.201902657
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Pre-earthquake changes of atmospheric ozone and temperature over the wide Balkan region
Conference Proceedings 2019, 1 (2019); https://doi.org/10.3997/2214-4609.201902657
/content/papers/10.3997/2214-4609.201902657
/content/papers/10.3997/2214-4609.201902657
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