Chlorophyll concentration and surface temperature changes associated with earthquakes

Orographic role in anomalous VHF propagation on the background of impending earthquakes (EQ)

“…This indeed is a difficult task as earthquake preparatory processes could cause diverse effects in the near Earth space and their manifestations are observed at the surface that may extend even up to the ionosphere [Depueva and Ruzhin 1995, Devi et al 2001, Liu et al 2001, Devi et al 2004, Parrot et al 2008, Devi et al 2013a, Devi et al 2013b. However, in the context of present observation, the atmospheric factors with reference to EQ-time drop in temperature will be specially discussed as this is one of the prime factors leading to changes in near Earth dynamics and also that in almost all the reported cases related to EQ induced temperature variations, be it surface temperature, the Sea Surface Temperature (SST) or Surface Latent Heat Flux (SLHF) [Qiang 1997, Tronin 2000, Tronin 2002, Dey and Singh 2003, Cervone et al 2004, Ouzonov et al 2007, Singh et al 2007, Alvan et al 2012, Goswami et al 2014], an increase in its value has been noted except a few cases [Singh et al 2010]. Such enhancement in temperature is related to the strain that affects its fluid-rock interaction releasing radiation from Ultra Low Frequencies (ULF) to Infra Red (IR) especially along the fault zone.…”

Did tsunamis lead to changes in ocean properties? a revisit

“…Of these, only two tsunami events were described: the Sumatran tsunami of December 26, 2004 (11 papers), and the Japanese tsunami of March 11, 2011 (4 papers). The remaining two papers include one that described the effects of several earthquakes in the area of the Arabian Sea (Singh et al, 2006), and another one that described the effects several earthquakes across the Pacific coast of the Americas (Alvan et al, 2012). The papers and their main findings are reported in Tables 1-4, while their geographic coverages are summarized in Figure 1.…”

Geoinformation for Informed Decisions

“…Relationships between inland and oceanic seismic activities and anomalous changes in SLHF in different parts of the world have been registered by many researchers. Time series of SLHF have shown meaningful rises from a month to few days before the earthquake events (Cervone et al 2004Dey et al 2004;Alvan et al 2012Alvan et al , 2013. SLHF data with resolution of 1.9°by 1.9°are available from the National Center for Environmental Prediction (NCEP-NCAR), reanalysis data of the IRI/LDEO Climate Data Library (http://iridl.ldeo.columbia.edu) which are generated by taken into consideration the measured values at various worldwide stations and also those retrieved from satellite data.…”

“…So far, they have identified some events that theoretically are expected to take place and practically are possible to detect before and during earthquakes. Studies on the surface and air temperature, surface latent heat flux, relative humidity, radon isotopes, ionosphere variations and some other precursors resulted in successful detection of extraordinary changes during several past oceanic and land earthquake instances and assumptions on the causes of these events observed during seismic activities (Wang and Shi 1984;Gorny et al 1988;Nosov 1998;Freund and Ouzounov 2001;Tronin et al 2002Tronin et al , 2004Dey and Singh 2003a, b;Cervone et al 2004Cervone et al , 2006Pulinets 2004;Choudhury 2003-2005a, b, c;Saraf et al 2008;Choudhury et al 2006;Parrot et al 2006;Pulinets et al 2006;, Singh et al 2007aQin et al 2009;Kumar et al 2009;Revathi et al 2011;Alvan et al 2012).…”