Tectonic leakage of fault bounded aquifers subject to non-isothermal recharge: a mechanism generating thermal precursors to seismic events

Abstract.A self adaptive approach (RST, Robust Satellite Technique) has been proposed as a suitable tool for satellite TIR surveys in seismically active regions devoted to detect and monitor thermal anomalies possibly related to earthquake occurrence. In this work, RST approach has been applied to 15 years of AVHRR (Advanced Very High Resolution Radiometer) thermal infrared observations in order to study the 6 April 2009 Abruzzo earthquake. Preliminary results show clear differences in TIR anomalies occurrence during the periods used for validation (15 March-15 April 2009) and the one (15 March-15 April 2008) without earthquakes with M L ≥4.5, used for confutation purposes. Quite clear TIR anomalies appears also to mark main tectonic lineaments during the preparatory phases of others, low magnitude(3.9

Section: Introductionmentioning

confidence: 88%

A study on the Abruzzo 6 April 2009 earthquake by applying the RST approach to 15 years of AVHRR TIR observations

Lisi

Filizzola

Genzano

et al. 2010

“…emission rates, to the modification of ground water regime (see Hamza, 2001) and/or to the increase of convective heat flux (Qiang et al, 1991;Tronin, 2000). Other, more complex models have been proposed, that include the increase of near surface temperature, among the other expected pre-seismic phenomena (e.g.…”

Section: Introductionmentioning

confidence: 99%

Using RST approach and EOS-MODIS radiances for monitoring seismically active regions: a study on the 6 April 2009 Abruzzo earthquake

Pergola

Aliano

Coviello

et al. 2010

Abstract.In the last few years, Robust Satellite data analysis Techniques (RST) have been proposed and successfully applied for monitoring major natural and environmental risks. Among the various fields of application, RST analysis has been used as a suitable tool for satellite TIR surveys in seismically active regions, devoted to detect and monitor thermal anomalies possibly related to earthquake occurrence. In this work, RST has been applied, for the first time, to thermal infrared observations collected by MODIS (Moderate Resolution Imaging Spectroradiometer) -the sensor onboard EOS (Earth Observing System) satellites -in the case of Abruzzo (Italy) earthquake occurred on 6 April 2009 (M L ∼5.8). First achievements, shown in this work, seem to confirm the sensitivity of the proposed approach in detecting perturbations of the Earths emission thermal field few days before the event. The reliability of such results, based on the analysis of 10 years of MODIS observations, seems to be supported by the results achieved analyzing the same area in similar observation conditions but in seismically unperturbed periods (no earthquakes with M L ≥5) that will be also presented.

“…Different authors (Qiang et al, 1991;Tramutoli et al, , 2009, in order to explain the appearance of anomalously high TIR records near the place and the time of earthquake occurrence, attributed their appearance to the increase of green-house gas (such as CO 2 , CH 4 , etc.) emission rates, to the modification of ground water regime (see Hamza, 2001) and/or to the increase of convective heat flux (Qiang et al, 1991;Tronin, 2000;Surkov et al, 2006). Other, more complex models (e.g.…”

Section: Introductionmentioning

confidence: 99%

RST analysis of MSG-SEVIRI TIR radiances at the time of the Abruzzo 6 April 2009 earthquake

Genzano

Aliano

Corrado

et al. 2009

Abstract. Space-time fluctuations of Earth's emitted Thermal Infrared (TIR) radiation have been observed from satellite months to weeks before earthquakes occurrence.The general RST approach has been proposed in order to discriminate normal (i.e. related to the change of natural factor and/or observation conditions) TIR signal fluctuations from anomalous signal transient possibly associated to earthquake occurrence. In this work RST approach is applied to the Abruzzo 6 April 2009 event (M L =5.8) by using for the first time MSG-SEVIRI (Meteosat Second Generation -Spinning Enhanced Visible and Infrared Imager) thermal infrared observations. A validation/confutation analysis has been performed in order to verify the presence/absence of anomalous space-time TIR transients in the presence/absence of significant seismic activity. MarchApril 2009 has been analyzed for validation purposes. Relatively unperturbed periods (no earthquakes with M L ≥5) have been taken for confutation. A specific TIR anomalies spacetime persistence analysis as well as a cloud coverage distribution test have been introduced in order to eliminate artifacts and outliers both in the validation and confutation phases. Preliminary results show clear differences in TIR anomalies occurrence during the periods used for validation and confutation purposes. Quite clear TIR anomalies appear also to mark main tectonic lines related to the preparatory phases of others, low magnitude (M L ∼4) earthquakes, occurred in the area.