TY - JOUR ID - 55062 TI - Thermal Anomaly Detection prior to earthquakes with training artificial neural networks with ant colony optimization JO - Environmental Management Hazards JA - JHSCI LA - en SN - 2423-415X AU - Choubsaz, Sepehr AU - Akhoondzadeh, Mehdi AU - Saradjian, Mohammad Reza AD - Graduate Student at Remote Sensing Department, Surveying and Geo-spatial Information Faculty, College of Engineering, University of Tehran, Tehran, Iran AD - Assistant Professor at Remote Sensing Department, Surveying and Geo-spatial Information Faculty, College of Engineering, University of Tehran, Tehran, Iran AD - Associate Professor at Remote Sensing Department, Surveying and Geo-spatial Information Faculty, College of Engineering, University of Tehran, Tehran, Iran Y1 - 2015 PY - 2015 VL - 2 IS - 2 SP - 207 EP - 224 KW - anomaly KW - earthquake KW - Artificial Neural Network KW - Ant colony Optimization KW - Thermal Pre-cursor DO - 10.22059/jhsci.2015.55062 N2 - Remote sensing techniques made it possible to study thermal anomalies prior to major earthquakes regardless of complications in comprehending earthquake mechanisms. Thermal pre-cursors are one the main resources for earthquake prediction. In this article, land surface temperature, atmospheric temperature, surface latent heat flux and outgoing long-wave radiation have been studied to detect anomalies prior to Varzaghan (August 11, 2012), Boushehr (April 9, 2013) and Saravan (April 16, 2013) earthquakes. To detect earthquake related anomalies, time series of each pre-cursor has been produced within the period of earthquake, land surface temperature and atmospheric temperature were acquired from MODIS products, surface latent heat flux from GLDAS library and outgoing long-wave radiation from AIRS products. These time series were predicted by an artificial neural network with ant colony optimization training method. The results of this study were compared with artificial neural network with Levenberg-Marquardt training algorithm. It has been shown that 10 to 13 days before Varzaghan earthquake, anomalies has appeared in all of the mentioned precursors, in case of Boushehr earthquake 6 to 9 days before the event, anomalies appeared in atmospheric temperature and outgoing long-wave radiation and also a strong anomaly appeared in surface latent heat flux 2 days prior to earthquake and in Saravan earthquakes anomalies have been detected 5 to 8 days before the earthquake in all of the studied thermal pre-cursors. UR - https://jhsci.ut.ac.ir/article_55062.html L1 - https://jhsci.ut.ac.ir/article_55062_3ea15513e9c99943d50ddb61df23a13c.pdf ER -