NOPR Collection:

Responses of meteorological parameters during August 24, 2016 Myanmar earthquake

Sun, 01 Mar 2020 00:00:00 GMT

Title: Responses of meteorological parameters during August 24, 2016 Myanmar earthquake Authors: Ghosh, Abhijit; Hazra, Pranab; De, S S; Guha, G; Biswas, Debasish Abstract: A continental plate movement in the Sunda Trench region resulted into the Myanmar Earthquake (M=6.8) of 24 August, 2016. The variations in the lithosphere–atmosphere-ionosphere (LAI) coupling take place during the occurrence of the earthquake. The thermodynamic equilibrium of the troposphere is very much connected with the atmospheric pressure, temperature, humidity, rainfall and wind speed. Some anomalies are observed on the surface temperature and other atmospheric parameters during the period. The anomalous surface latent heat increase takes place within a time interval of several days before a strong earthquake in this earthquake preparation zone. The variations in Lithosphere-Atmosphere-Ionosphere coupling during Myanmar earthquake (M=6.8) resulted in anomalous changes in different meteorological parameters. The variations in LAI may be due to enhanced radon and other greenhouse fluid emanations during the pre and post earthquake period. The meteorological data analyzed to investigate these observations as well as to invoke responses of the Myanmar earthquake. The occurrences of precursors during the pre-and post-periods of this earthquake from 1 August, 2016 to 30 August, 2016 are reported. Page(s): 5-12

Characteristic of Sporadic-E over the anomaly crest region during the low solar cycle

Sun, 01 Mar 2020 00:00:00 GMT

Title: Characteristic of Sporadic-E over the anomaly crest region during the low solar cycle Authors: Bhawre, Purushottam; Yadav, Ritesh Abstract: The paper describes the occurrence of the sporadic-E layer for the anomaly crest region Bhopal, (23.2° N, 77.4° E and 18.4°) over four years, covering the waning phase of the 23^rd Solar Cycle and the preliminary phase of 24^th Solar Cycle. This precise period is very appropriate for observing the sunspot number and it includes periods of stumpy solar activities. We also included space weather activities along with it. We have taken the auroral electrojet index (AE) and, disturbed storm time index (Dst), Interplanetary Magnetic Field (Bz), to characterize the storm intensity. The sunspot number (Rz), solar flux (F10.7) and Proton Density are described in solar activities. The occurrence probability of Sporadic- E, the layer is maximum in the summertime, temperate during the equinox time, and low during the wintertime. Noteworthy occurrence summits appears from June to July in summer and from December to January in winter. The layer occurrence exhibited a dual peak variation with individual layer group, in the morning and the other during the evening. The dawn layer ancestry was related to layering density-increased representative the consolidation of the layer while it decreased during the evening layer ancestry. Page(s): 13-18

Long term (1975-2016) anomaly of surface latent heat flux (SLHF) over Indian subcontinent: Signatures of early warning of earthquake disasters

Sun, 01 Mar 2020 00:00:00 GMT

Title: Long term (1975-2016) anomaly of surface latent heat flux (SLHF) over Indian subcontinent: Signatures of early warning of earthquake disasters Authors: Kumar, Adarsh Abstract: A long-term anomaly study of 42 years (1975-2016) of surface heat flux (SLHF) from the epicentres of the earthquakes over the Indian subcontinent carried out. The results of study revealed anomalous behaviour. On an average, maximum surge of SLHF was found to be 10-15 days before the main earthquake events which were likely due to the ocean atmosphere interaction. This improvement of SLHF before the most earthquake events was considerably attributed to the surge in infrared thermal (IR) temperatures within the epicentral and near surroundings. The abnormal surge in SLHF provides associate early cautionary of a ruinous earthquake during a region, provided there's a decent understanding of the ground noise because of the zonal tides and regional monsoon in surface heat energy flux. A lot of effort has been put to have an understanding of the level of background noise within the epicentral regions of the 10 earthquakes over the Indian Subcontinent during the last 42 years. Latitudinal and longitudinal effects of SLHF anomaly for the ten earthquakes over Indian Subcontinent were studied, which showed that the anomalous behaviour of SLHF before the main earthquake events were somewhat associated only with the coastal earthquake activities. Page(s): 19-27

Analysis of anomalous ionospheric total electron content variation for earthquakes in South East Asian region with IGS network

Sun, 01 Mar 2020 00:00:00 GMT

Title: Analysis of anomalous ionospheric total electron content variation for earthquakes in South East Asian region with IGS network Authors: Debnath, Anjan Abstract: A study to find ionospheric Total Electron Content (TEC) anomaly around various earthquake days that occurred during January, 2016 to March, 2017 in the South East Asian region has been undertaken. Large magnitude shallow earthquakes have only been considered. In the study, VTEC data from IGS network has been analyzed with the help of IONOLABTEC software tool. The analysis has been done based on IGS stations that fall within Dobrovolsky Radius of each earthquake. The analysis has included geo magnetically quiet days only to take out all non-seismic effects in the ionosphere. The analysis has shown TEC irregularity few days around almost all earthquake events. Page(s): 28-32