The location of tectonic lineaments such as faults and dykes are of interest for a range of applications, particularly because of their association with hydrothermal mineralization. The extraction of tectonic lineaments from digital satellite data is a fundamental application in remote sensing. Keywords: pre-earthquake anomaly lineament change multi-temporal Landsat 8 OLI Gorkha Imphal The results obtained using the automated and geo-integrated techniques help us to detect earthquake in advance prior to its strike, could be used an alternative method in worldwide for future earthquake monitoring. The research results witnessed major changes of lineaments, and observed anomalies prior to the two impending earthquakes while it was observed normal behaviour in absence of earthquake event. The derived lineament data were used further in different forms to observe pre-earthquake anomalies.

Epicenter based single tile of five multi-temporal Landsat 8 OLI data were considered for each case, where one image was considered to show the normal behaviour of lineament (in absence of earthquake) and three for anomalous behaviour prior to earthquake (in the presence of earthquake) and rest one used to represent post-earthquake behaviour (in absence of earthquake), respectively.

This data found convincing results to identify relevant anomalous variations prior to the two recent earthquakes i.e., Gorkha of Nepal 7.8 Mw (major) (25 April 2015) and Imphal of Manipur (Eastern India) 6.7 Mw (strong) (4 January 2016) compare with normal behaviour in absence of earthquake. Pre-earthquake anomaly detection and assessment was performed in the present study through lineament changes observation using multi-temporal Landsat 8 OLI satellite imageries.

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