Publications

Mohamed, EK; Gahalaut, VK; Sekertekin, A; Inyurt, S (2021). Atmospheric, ionospheric and earth-related variations associated with the 11th August 2012 earthquakes, Ahar, Iran. JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS, 216, 105595.

Abstract
On August 11, 2012, two successive strong earthquakes (Mw = 6.4 and 6.3) hit the East Azerbaijan Province, NW Iran at 12:23 and 12:34 UTC. This study investigated the variations of multi earthquakes precursors, (Land Surface Temperature (LST), Total Electron Content (TEC), Outgoing Longwave Radiation (OLR), and Air Temperature (AT) of non-seismic phenomena before and after the successive Ahar (Iran) earthquakes. In this study, we used the moving median method to detect the anomalies in TEC, whereas ?2? (95% confidence level) interval was used in MODIS LST and OLR analyses as an anomaly indicator. The results indicated that the MODIS Nighttime LST decreased by 5.5?6.3 ?C compared to the mean (LST) within 10?12 days before the earthquakes Then a dramatic increase was observed on August 02, 2012. The LST results were consistent with the results of OLR, where the anomaly was observed on July 29, 2012. In addition to LST and OLR, significant TEC anomalous disturbances (increase and decrease) occurred two weeks before the earthquakes started on 28th July and reached the highest value 3 days before the earthquakes. Furthermore, AT analysis also provided identical results with LST behaviors. These results were instructive for seismologists and represent the importance of the corresponding potential precursors for upcoming earthquakes.

DOI:
10.1016/j.jastp.2021.105595

ISSN:
1364-6826