Atmospheric Meteorological Parameters and Ionospheric F2 Layer Critical Frequency (foF2) Observation for 6th December, 2016 Indonesia Earthquake (M 6.5): A Case Study


  • Suman Paul Department of Physics, Rishi Bankim Chandra Evening College, Naihati, 24 Parganas (N), 743165, India;Centre of Advanced Study in Radio Physics and Electronics, University of Calcutta, Kolkata, 700009, India



On 6th December, 2016, an earthquake with M 6.5 occurred at the tectonic plate boundary, southwest of Sumatra, Indonesia (Latitude: 0.5897° S, Longitude: 101.3431° E). In this case, ionosphereic critical frequency of F2 layer (foF2) variations and meteorological parameters, viz., air temperature, relative humidity, atmospheric pressure and wind speed variations were investigated so as to detect any anomalies. Data are obtained from different websites freely available for researchers. In the absence of real ionosonde foF2 data, IRI 2016 model data were used. For each parameter, anomaly window were defined when values fell beyond ± 6 °C, < 70 %, ± 4 mb and ± 3.5 km h-1 from the event day value and one third of total foF2 values broke the limits of the upper and lower bounds. Certain random anomalies in temperature, relative humidity, pressure, wind speed and foF2 frequencies were observed different days prior to occurrence of the quake but each parameter showed anomalies 12 days before the occurrence. Also, geomagnetic tranquility was justified through Kp and Dst indices. This study reveals that continuous monitoring of atmospheric meteorological parameters and regular ionospheric foF2 observations might help us to predict an earthquake about a week prior to the occurrence.


Ionosphere; Ionosphereic foF2 anomaly; Meteorological parameter anomaly; Short-term prediction


[1] De S S, Paul S, Haldar D K, De D, Kundu A K, Chattopadhyay S, Barui S. Analyses of the effects of several earthquakes on the sub-ionospheric VLF–LF signal propagation. Journal of Atmospheric and Solar-Terrestrial Physics, 2012, 81-82, 20-26, DOI:

[2] De S S, De B K, Bandyopadhyay B, Paul S, Haldar D K, Bhowmick A, Barui S, Ali R. Effects on atmospherics at 6 kHz and 9 kHz recorded at Tripura during the India-Pakistan Border earthquake. Natural Hazards and Earth System Sciences, 2010, 10, 843-855, DOI:

[3] De S S, Bandyopadhyay B, Das T K, Paul S, Haldar D K, De B K, Chattopadhyay G. Studies on the anomalies in the behaviour of transmitted subionospheric VLF electromagnetic signals and the changes in the fourth Schumann resonance mode as signatures of two pending earthquakes. Indian Journal of Physics, 2011, 85(3), 447-470, DOI:

[4] De S S, De B K, Bandyopadhyay B, Paul S, De D, Barui S, Sanfui M, Pal P, Das T K. Studies on the precursors of an earthquake as the VLF electromagnetic sferics. Romanian Journal of Physics, 2011, 56(9-10), 1208-1227, LINK:

[5] Hazra P, Barui S, De S S, Paul S. Studies on the influence of two large earthquakes (M> 6) upon 9 kHz sferics recorded from Kolkata. Romanian Journal of Physics, 2015, 60(7-8), 1218-1224, LINK:

[6] Hazra P, De S S, Paul S, Guha G, Ghosh A. Thermal Anomalies Around the Time of Nepal Earthquakes M 7.8 April 25, 2015 and M 7.3 May 12, 2015. International Journal of Geotechnical Earthquake Engineering, 2017, 8(1), 58-73, DOI:

[7] Maksudov A U, Zufarov M A. Measurement of neutron and charged particle fluxes toward earthquake prediction. Earthquake Science, 2017, 30(5-6), 283-288, DOI:

[8] Novianta M A, Achmad M S, Setyaningsih E. Wireless Earthquakes Feature Monitoring Based on Acceleration and Magnetic Measurements Using MEMS Sensor. Proceedings of the 1st International Conference on Engineering Technology and Industrial Application (ICETIA 2014), 189-192, LINK:

[9] Zeren Z M, Zhang X M, Shen X H, Sun W H, Ning D M, Ruzhin Y. VLF radio signal anomalies associated with strong earthquakes. XXXIth URSI General Assembly of Scientific Symposium, (URSI GASS 2014), DOI:

[10] Tao Yu,Tian M,Yungang W, Jingsong W. Study of the ionospheric anomaly before the Wenchuan earthquake. Chinese Science Bulletin, 2009, 54(6), 1080-1086, DOI:

[11] Devi M, Barbara A K, Depueva A. Association of Total Electron Content (TEC) and foF2 variations with earthquake events at the anomaly crest region. Annals of Geophysics, 2004, 47(1), 83-91, DOI:

[12] Chuo Y J, Chen Y I, Liu J Y, Pulinets, S A. Ionospheric foF2 variations prior to strong earthquakes in Taiwan area. Advances in Space Research, 2001, 27(6-7), 1305-1310, DOI:

[13] Irfan M, Alam A, Junaid M, Ameen M A, Iqbal T, Fuqiong H. Anomalous Ionospheric foF2 Variations Observed Prior to the Dalbandin Earthquake in Pakistan. Earthquake Research in China, 2015, 29(4), 567-575.

[14] Liperovskaya E V, Parrot M, Bogdanov V V, Meister C V, Rodkin M V, Liperovsky V A. On variations foF2 and F-spread before strong earthquakes in Japan. Natural Hazards and Earth System Sciences, 2006, 6(5), 735-739, DOI:

[15] Wiens D A, DeMets C, Gordon R G, Stein S, Argus D, Engeln J F, Lundgren P, Quible D, Stein C, Weinstein S, Woods D F. A diffuse plate boundary model for Indian Ocean tectonics. Geophysical Research Letters, 1985, 12, 429-432, DOI:

[16] Delescluse M, Chamot-Rooke N. Instantaneous deformation and kinematics of the India–Australia Plate. Geophysical Journal International, 2007, 168(2), 818-842, DOI:

[17] Sibuet J C, Rangin C, Pichon X L, Singh S, Cattaneo A, Graindorge D, Klingelhoefer F, Lin J-Yi, Malod J, Maury T, Schneider J L, Sultan N, Umber M, Yamaguchi H, the “Sumatra aftershocks” team. 26th December 2004 great Sumatra–Andaman earthquake: Co-seismic and post-seismic motions in northern Sumatra. Earth and Planetary Science Letters, 2007, 263(1-2), 88-103, DOI:

[18] Pulinets S A, Liu J Y, Safronova I. A. Interpretation of a statistical analysis of variations in the fof2 critical frequency before earthquakes based on data from chung-li ionospheric station. Geomagnetism and Aeronomy, 2004, 44(1), 102-106.

[19] Xu T, Hu Y, Wu J. Wu Z, Suo Y, Feng J. Giant disturbance in the ionospheric F2 region prior to the M8. 0 Wenchuan earthquake on 12 May 2008. Annales Geophysicae, 2010, 28(8), 1533-1538, DOI:

[20] Hazra P, Paul S, Chatterjee S, Chandra A. Meteorological Parameter Studies during 6th December 2016 Indonesia Earthquake (Mw 6.5), “Lecture Notes in Electrical Engineering”, Conference proceedings under Springer Book Series, accepted for publication.

[21] Panda G, Jain S K, Vijay S K, Gwal A K. Study of ionospheric perturbation during Turkey Central earthquake of December 20, 2007. Journal of Indian Geophysical Union, 2010, 14(2), 133-138.

[22] Jánský J, Pasko V P. Earthquake lights: Mechanism of electrical coupling of Earth's crust to the lower atmosphere. Journal of Geophysical Research: Atmospheres, 2018, 123, 8901-8914, DOI:


How to Cite

Paul, S. (2018). Atmospheric Meteorological Parameters and Ionospheric F2 Layer Critical Frequency (foF2) Observation for 6th December, 2016 Indonesia Earthquake (M 6.5): A Case Study. Journal of Atmospheric Science Research, 1(1), 6–12.


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