Multi-Parametric Climatological Analysis Reveals the Involvement of Fluids in the Preparation Phase of the 2008 Ms 8.0 Wenchuan and 2013 Ms 7.0 Lushan Earthquakes

摘要: A multi-parametric approach was applied to climatological data before the Ms 8.0 2008 Wenchuan and 7.0 2013 Lushan earthquakes (EQs) in order detect anomalous changes associated preparing phase of those large seismic events. analysis for Precursor Identification (CAPRI) algorithm used detection anomalies time series four parameters (aerosol optical depth, AOD; skin temperature, SKT; surface latent heat flux, SLHF total column water vapour, TCWV). Our results show a chain processes occurred within two months EQs: AOD response is earliest, followed by SKT, TCWV EQs. close spatial relation between seismogenic Longmenshan fault (LMSF) zone extent detected indicates that some faults The similarity sequence may be related same process: we interpret observed as consequence upraising gases from fluid-rich middle/upper crust along pre-existing faults, their release into atmosphere. analytical able capture phenomena preparation strong